/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/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:39:07,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:39:07,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:39:08,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:39:08,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:39:08,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:39:08,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:39:08,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:39:08,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:39:08,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:39:08,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:39:08,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:39:08,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:39:08,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:39:08,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:39:08,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:39:08,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:39:08,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:39:08,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:39:08,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:39:08,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:39:08,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:39:08,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:39:08,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:39:08,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 18:39:08,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 18:39:08,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 18:39:08,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 18:39:08,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 18:39:08,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 18:39:08,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:39:08,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:39:08,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:39:08,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:39:08,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:39:08,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:39:08,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:39:08,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:39:08,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:39:08,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:39:08,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:39:08,054 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 [2021-02-19 18:39:08,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:39:08,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:39:08,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:39:08,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:39:08,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:39:08,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:39:08,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:39:08,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:39:08,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:39:08,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:39:08,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:39:08,078 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:39:08,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:39:08,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:39:08,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:39:08,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:39:08,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:39:08,430 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:39:08,431 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:39:08,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2021-02-19 18:39:08,432 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2021-02-19 18:39:08,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:39:08,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:39:08,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:39:08,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:39:08,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:39:08,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:39:08,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:39:08,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:39:08,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:39:08,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/1) ... [2021-02-19 18:39:08,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:39:08,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:39:08,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:39:08,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:39:08,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (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 [2021-02-19 18:39:08,599 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:39:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:39:08,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:39:08,600 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:39:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:39:08,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:39:08,600 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:39:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:39:08,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:39:08,601 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:39:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:39:08,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:39:08,603 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:39:08,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:39:08,839 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:39:08,841 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:39:08 BoogieIcfgContainer [2021-02-19 18:39:08,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:39:08,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:39:08,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:39:08,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:39:08,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:39:08" (1/2) ... [2021-02-19 18:39:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1df3ea and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:39:08, skipping insertion in model container [2021-02-19 18:39:08,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:39:08" (2/2) ... [2021-02-19 18:39:08,847 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2021-02-19 18:39:08,852 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:39:08,852 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:39:08,855 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:39:08,856 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:39:08,904 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:39:08,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:39:08,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:39:08,935 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:39:08,936 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:39:08,936 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:39:08,936 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:39:08,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:39:08,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:39:08,936 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:39:08,944 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-02-19 18:39:08,971 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:39:08,984 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:08,985 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:08,985 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash -841025293, now seen corresponding path program 1 times [2021-02-19 18:39:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:08,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452326176] [2021-02-19 18:39:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452326176] [2021-02-19 18:39:09,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:09,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 18:39:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348680425] [2021-02-19 18:39:09,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:39:09,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:39:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:39:09,296 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:09,346 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-02-19 18:39:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:39:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 18:39:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:09,369 INFO L225 Difference]: With dead ends: 257 [2021-02-19 18:39:09,369 INFO L226 Difference]: Without dead ends: 230 [2021-02-19 18:39:09,371 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:39:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-02-19 18:39:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-02-19 18:39:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-02-19 18:39:09,441 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-02-19 18:39:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:09,442 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-02-19 18:39:09,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-02-19 18:39:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:39:09,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:09,444 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:09,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:39:09,445 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1445394957, now seen corresponding path program 1 times [2021-02-19 18:39:09,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:09,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379529645] [2021-02-19 18:39:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379529645] [2021-02-19 18:39:09,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:09,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:39:09,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952602229] [2021-02-19 18:39:09,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:39:09,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:39:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:39:09,530 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:39:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:09,603 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2021-02-19 18:39:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:39:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:39:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:09,607 INFO L225 Difference]: With dead ends: 355 [2021-02-19 18:39:09,608 INFO L226 Difference]: Without dead ends: 355 [2021-02-19 18:39:09,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:39:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-02-19 18:39:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2021-02-19 18:39:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2021-02-19 18:39:09,639 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2021-02-19 18:39:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:09,640 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2021-02-19 18:39:09,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:39:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2021-02-19 18:39:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:39:09,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:09,641 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:09,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:39:09,642 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1218173577, now seen corresponding path program 2 times [2021-02-19 18:39:09,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:09,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015088587] [2021-02-19 18:39:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015088587] [2021-02-19 18:39:09,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:09,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:39:09,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366138897] [2021-02-19 18:39:09,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:39:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:39:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:39:09,710 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) 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) [2021-02-19 18:39:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:09,784 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2021-02-19 18:39:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:39:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) 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 [2021-02-19 18:39:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:09,787 INFO L225 Difference]: With dead ends: 450 [2021-02-19 18:39:09,788 INFO L226 Difference]: Without dead ends: 450 [2021-02-19 18:39:09,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:39:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-02-19 18:39:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-02-19 18:39:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2021-02-19 18:39:09,803 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2021-02-19 18:39:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:09,803 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2021-02-19 18:39:09,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) 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) [2021-02-19 18:39:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2021-02-19 18:39:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:39:09,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:09,812 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:09,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:39:09,813 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1305466823, now seen corresponding path program 3 times [2021-02-19 18:39:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:09,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036653860] [2021-02-19 18:39:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036653860] [2021-02-19 18:39:09,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:09,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:39:09,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942257857] [2021-02-19 18:39:09,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:39:09,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:39:09,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:39:09,865 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:39:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:09,929 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2021-02-19 18:39:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:39:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:39:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:09,931 INFO L225 Difference]: With dead ends: 349 [2021-02-19 18:39:09,931 INFO L226 Difference]: Without dead ends: 345 [2021-02-19 18:39:09,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:39:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-02-19 18:39:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2021-02-19 18:39:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2021-02-19 18:39:09,940 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2021-02-19 18:39:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:09,940 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2021-02-19 18:39:09,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:39:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2021-02-19 18:39:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:39:09,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:09,941 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:09,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:39:09,942 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1237790365, now seen corresponding path program 1 times [2021-02-19 18:39:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:09,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989129946] [2021-02-19 18:39:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989129946] [2021-02-19 18:39:09,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:09,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:39:09,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175640343] [2021-02-19 18:39:09,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:39:09,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:39:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:39:09,968 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:10,043 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2021-02-19 18:39:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:39:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:39:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:10,046 INFO L225 Difference]: With dead ends: 345 [2021-02-19 18:39:10,046 INFO L226 Difference]: Without dead ends: 307 [2021-02-19 18:39:10,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:39:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-02-19 18:39:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2021-02-19 18:39:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-02-19 18:39:10,053 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-02-19 18:39:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:10,054 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-02-19 18:39:10,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-02-19 18:39:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:39:10,054 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:10,055 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:10,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:39:10,055 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1898762083, now seen corresponding path program 2 times [2021-02-19 18:39:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:10,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425885024] [2021-02-19 18:39:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:10,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425885024] [2021-02-19 18:39:10,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:39:10,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 18:39:10,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081682645] [2021-02-19 18:39:10,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:39:10,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:39:10,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:39:10,125 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:10,143 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2021-02-19 18:39:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:39:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:39:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:10,146 INFO L225 Difference]: With dead ends: 257 [2021-02-19 18:39:10,146 INFO L226 Difference]: Without dead ends: 241 [2021-02-19 18:39:10,146 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:39:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-02-19 18:39:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-02-19 18:39:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2021-02-19 18:39:10,155 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2021-02-19 18:39:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:10,155 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2021-02-19 18:39:10,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2021-02-19 18:39:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:39:10,156 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:10,156 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:10,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:39:10,157 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1870108967, now seen corresponding path program 1 times [2021-02-19 18:39:10,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:10,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005453366] [2021-02-19 18:39:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:10,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005453366] [2021-02-19 18:39:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301441140] [2021-02-19 18:39:10,192 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 [2021-02-19 18:39:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:39:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:10,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:10,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:39:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774649788] [2021-02-19 18:39:10,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:39:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:39:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:39:10,352 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 18:39:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:10,454 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2021-02-19 18:39:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:39:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 [2021-02-19 18:39:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:10,456 INFO L225 Difference]: With dead ends: 295 [2021-02-19 18:39:10,456 INFO L226 Difference]: Without dead ends: 295 [2021-02-19 18:39:10,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-02-19 18:39:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2021-02-19 18:39:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-02-19 18:39:10,463 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2021-02-19 18:39:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-02-19 18:39:10,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 18:39:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-02-19 18:39:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:39:10,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:10,464 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:10,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 18:39:10,678 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash 203396161, now seen corresponding path program 1 times [2021-02-19 18:39:10,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:10,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446793355] [2021-02-19 18:39:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:10,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446793355] [2021-02-19 18:39:10,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237792939] [2021-02-19 18:39:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:39:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:39:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:10,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:39:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439558042] [2021-02-19 18:39:10,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:39:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:39:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:39:10,886 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-02-19 18:39:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:10,971 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-02-19 18:39:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:39:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 21 [2021-02-19 18:39:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:10,975 INFO L225 Difference]: With dead ends: 280 [2021-02-19 18:39:10,975 INFO L226 Difference]: Without dead ends: 280 [2021-02-19 18:39:10,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-02-19 18:39:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-02-19 18:39:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-02-19 18:39:10,982 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-02-19 18:39:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:10,982 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-02-19 18:39:10,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-02-19 18:39:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-02-19 18:39:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:39:10,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:10,983 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:11,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:11,198 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash 970661811, now seen corresponding path program 1 times [2021-02-19 18:39:11,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:11,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032430298] [2021-02-19 18:39:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:11,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032430298] [2021-02-19 18:39:11,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977685059] [2021-02-19 18:39:11,282 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 [2021-02-19 18:39:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:39:11,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:11,507 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 18 treesize of output 14 [2021-02-19 18:39:11,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:11,518 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 16 treesize of output 12 [2021-02-19 18:39:11,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-02-19 18:39:11,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:11,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,538 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2021-02-19 18:39:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:39:11,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:11,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:11,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:39:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:11,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:11,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:39:11,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504764776] [2021-02-19 18:39:11,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:39:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:39:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:11,607 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:39:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:11,705 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2021-02-19 18:39:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:39:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 23 [2021-02-19 18:39:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:11,708 INFO L225 Difference]: With dead ends: 476 [2021-02-19 18:39:11,708 INFO L226 Difference]: Without dead ends: 449 [2021-02-19 18:39:11,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-02-19 18:39:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2021-02-19 18:39:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 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) [2021-02-19 18:39:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-02-19 18:39:11,719 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-02-19 18:39:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:11,720 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-02-19 18:39:11,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:39:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-02-19 18:39:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:39:11,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:11,721 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:11,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:11,930 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1935110977, now seen corresponding path program 2 times [2021-02-19 18:39:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773392821] [2021-02-19 18:39:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773392821] [2021-02-19 18:39:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196632686] [2021-02-19 18:39:12,047 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 [2021-02-19 18:39:12,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:39:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:12,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-02-19 18:39:12,186 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 19 treesize of output 15 [2021-02-19 18:39:12,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 18:39:12,236 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 24 treesize of output 18 [2021-02-19 18:39:12,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 18:39:12,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2021-02-19 18:39:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:39:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760145557] [2021-02-19 18:39:12,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:39:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:39:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:12,302 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-02-19 18:39:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:12,372 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2021-02-19 18:39:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:39:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-02-19 18:39:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:12,375 INFO L225 Difference]: With dead ends: 517 [2021-02-19 18:39:12,375 INFO L226 Difference]: Without dead ends: 490 [2021-02-19 18:39:12,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-02-19 18:39:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-02-19 18:39:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 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) [2021-02-19 18:39:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-02-19 18:39:12,386 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-02-19 18:39:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:12,386 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-02-19 18:39:12,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-02-19 18:39:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-02-19 18:39:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:39:12,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:12,387 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:12,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:12,597 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1241061027, now seen corresponding path program 3 times [2021-02-19 18:39:12,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:12,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730523951] [2021-02-19 18:39:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:12,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730523951] [2021-02-19 18:39:12,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157392005] [2021-02-19 18:39:12,662 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 [2021-02-19 18:39:12,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:39:12,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:39:12,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:12,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-02-19 18:39:12,792 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 19 treesize of output 15 [2021-02-19 18:39:12,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,804 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 20 treesize of output 16 [2021-02-19 18:39:12,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-02-19 18:39:12,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:39:12,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:12,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:12,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:39:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:12,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:12,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:39:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101135726] [2021-02-19 18:39:12,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:39:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:39:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:12,869 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-02-19 18:39:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:12,966 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2021-02-19 18:39:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:39:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 23 [2021-02-19 18:39:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:12,969 INFO L225 Difference]: With dead ends: 572 [2021-02-19 18:39:12,969 INFO L226 Difference]: Without dead ends: 545 [2021-02-19 18:39:12,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-02-19 18:39:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2021-02-19 18:39:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 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) [2021-02-19 18:39:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-02-19 18:39:12,979 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-02-19 18:39:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:12,979 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-02-19 18:39:12,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-02-19 18:39:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-02-19 18:39:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:12,981 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:12,981 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:13,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 18:39:13,194 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 44889105, now seen corresponding path program 4 times [2021-02-19 18:39:13,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:13,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277185911] [2021-02-19 18:39:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277185911] [2021-02-19 18:39:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904563991] [2021-02-19 18:39:13,226 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 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 [2021-02-19 18:39:13,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:39:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:13,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:13,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:39:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255482993] [2021-02-19 18:39:13,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:39:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:39:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:39:13,327 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:13,896 INFO L93 Difference]: Finished difference Result 1541 states and 4596 transitions. [2021-02-19 18:39:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:39:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:39:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:13,904 INFO L225 Difference]: With dead ends: 1541 [2021-02-19 18:39:13,904 INFO L226 Difference]: Without dead ends: 1541 [2021-02-19 18:39:13,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:39:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-02-19 18:39:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 639. [2021-02-19 18:39:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.2962382445141065) internal successors, (2103), 638 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2103 transitions. [2021-02-19 18:39:13,933 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2103 transitions. Word has length 25 [2021-02-19 18:39:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:13,933 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 2103 transitions. [2021-02-19 18:39:13,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2103 transitions. [2021-02-19 18:39:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:13,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:13,936 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:14,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:14,151 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695491, now seen corresponding path program 5 times [2021-02-19 18:39:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:14,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890028362] [2021-02-19 18:39:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890028362] [2021-02-19 18:39:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828352410] [2021-02-19 18:39:14,198 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 [2021-02-19 18:39:14,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:39:14,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:14,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:14,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:14,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-02-19 18:39:14,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882885877] [2021-02-19 18:39:14,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:39:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:39:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:39:14,301 INFO L87 Difference]: Start difference. First operand 639 states and 2103 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:14,972 INFO L93 Difference]: Finished difference Result 1522 states and 4653 transitions. [2021-02-19 18:39:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:39:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:39:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:14,980 INFO L225 Difference]: With dead ends: 1522 [2021-02-19 18:39:14,980 INFO L226 Difference]: Without dead ends: 1522 [2021-02-19 18:39:14,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:39:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-02-19 18:39:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 877. [2021-02-19 18:39:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.256849315068493) internal successors, (2853), 876 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2853 transitions. [2021-02-19 18:39:15,013 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2853 transitions. Word has length 25 [2021-02-19 18:39:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:15,013 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 2853 transitions. [2021-02-19 18:39:15,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2853 transitions. [2021-02-19 18:39:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:15,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:15,016 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:15,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:15,236 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash 109770645, now seen corresponding path program 6 times [2021-02-19 18:39:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:15,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114800759] [2021-02-19 18:39:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:15,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114800759] [2021-02-19 18:39:15,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594310993] [2021-02-19 18:39:15,266 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 [2021-02-19 18:39:15,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:39:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:39:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:15,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:15,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:39:15,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299447840] [2021-02-19 18:39:15,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:39:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:39:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:39:15,373 INFO L87 Difference]: Start difference. First operand 877 states and 2853 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:15,789 INFO L93 Difference]: Finished difference Result 2682 states and 8563 transitions. [2021-02-19 18:39:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:39:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:39:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:15,802 INFO L225 Difference]: With dead ends: 2682 [2021-02-19 18:39:15,802 INFO L226 Difference]: Without dead ends: 2656 [2021-02-19 18:39:15,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:39:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-02-19 18:39:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 1223. [2021-02-19 18:39:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 3.4459901800327333) internal successors, (4211), 1222 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 4211 transitions. [2021-02-19 18:39:15,859 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 4211 transitions. Word has length 25 [2021-02-19 18:39:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:15,859 INFO L480 AbstractCegarLoop]: Abstraction has 1223 states and 4211 transitions. [2021-02-19 18:39:15,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 4211 transitions. [2021-02-19 18:39:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:15,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:15,864 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:16,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 18:39:16,081 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1981173825, now seen corresponding path program 7 times [2021-02-19 18:39:16,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:16,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872359538] [2021-02-19 18:39:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:16,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872359538] [2021-02-19 18:39:16,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359085878] [2021-02-19 18:39:16,108 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 [2021-02-19 18:39:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:16,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:16,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:39:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922813521] [2021-02-19 18:39:16,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:39:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:39:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:39:16,198 INFO L87 Difference]: Start difference. First operand 1223 states and 4211 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:39:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:16,263 INFO L93 Difference]: Finished difference Result 1760 states and 5792 transitions. [2021-02-19 18:39:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:39:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-02-19 18:39:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:16,272 INFO L225 Difference]: With dead ends: 1760 [2021-02-19 18:39:16,272 INFO L226 Difference]: Without dead ends: 1754 [2021-02-19 18:39:16,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-02-19 18:39:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1180. [2021-02-19 18:39:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.4079728583545377) internal successors, (4018), 1179 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 4018 transitions. [2021-02-19 18:39:16,321 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 4018 transitions. Word has length 25 [2021-02-19 18:39:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:16,321 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 4018 transitions. [2021-02-19 18:39:16,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:39:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 4018 transitions. [2021-02-19 18:39:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:16,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:16,324 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:16,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:39:16,542 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash -55350563, now seen corresponding path program 8 times [2021-02-19 18:39:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:16,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376871745] [2021-02-19 18:39:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376871745] [2021-02-19 18:39:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30727187] [2021-02-19 18:39:16,584 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 [2021-02-19 18:39:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:16,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:16,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:39:16,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100191233] [2021-02-19 18:39:16,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:39:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:39:16,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:39:16,670 INFO L87 Difference]: Start difference. First operand 1180 states and 4018 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 18:39:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:16,943 INFO L93 Difference]: Finished difference Result 3403 states and 11244 transitions. [2021-02-19 18:39:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:39:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 25 [2021-02-19 18:39:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:16,962 INFO L225 Difference]: With dead ends: 3403 [2021-02-19 18:39:16,962 INFO L226 Difference]: Without dead ends: 3381 [2021-02-19 18:39:16,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:39:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2021-02-19 18:39:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 1430. [2021-02-19 18:39:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.5269419174247725) internal successors, (5040), 1429 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 5040 transitions. [2021-02-19 18:39:17,017 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 5040 transitions. Word has length 25 [2021-02-19 18:39:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:17,017 INFO L480 AbstractCegarLoop]: Abstraction has 1430 states and 5040 transitions. [2021-02-19 18:39:17,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 18:39:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 5040 transitions. [2021-02-19 18:39:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:39:17,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:17,022 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:17,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:39:17,243 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1110523337, now seen corresponding path program 9 times [2021-02-19 18:39:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:17,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338696950] [2021-02-19 18:39:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:17,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338696950] [2021-02-19 18:39:17,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312434523] [2021-02-19 18:39:17,297 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 [2021-02-19 18:39:17,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:39:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:39:17,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:17,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:39:17,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252589951] [2021-02-19 18:39:17,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:39:17,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:17,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:39:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:39:17,417 INFO L87 Difference]: Start difference. First operand 1430 states and 5040 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:17,913 INFO L93 Difference]: Finished difference Result 4790 states and 15883 transitions. [2021-02-19 18:39:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:39:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:39:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:17,929 INFO L225 Difference]: With dead ends: 4790 [2021-02-19 18:39:17,929 INFO L226 Difference]: Without dead ends: 4746 [2021-02-19 18:39:17,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:39:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-02-19 18:39:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 2146. [2021-02-19 18:39:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2145 states have (on average 3.7104895104895106) internal successors, (7959), 2145 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 7959 transitions. [2021-02-19 18:39:18,058 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 7959 transitions. Word has length 25 [2021-02-19 18:39:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:18,058 INFO L480 AbstractCegarLoop]: Abstraction has 2146 states and 7959 transitions. [2021-02-19 18:39:18,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 7959 transitions. [2021-02-19 18:39:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:39:18,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:18,063 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:18,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:39:18,280 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:18,280 INFO L82 PathProgramCache]: Analyzing trace with hash -499348829, now seen corresponding path program 10 times [2021-02-19 18:39:18,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:18,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716306301] [2021-02-19 18:39:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:18,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716306301] [2021-02-19 18:39:18,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401188321] [2021-02-19 18:39:18,312 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 [2021-02-19 18:39:18,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:39:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:18,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:18,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:39:18,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311404863] [2021-02-19 18:39:18,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:39:18,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:39:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:18,396 INFO L87 Difference]: Start difference. First operand 2146 states and 7959 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 18:39:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:18,511 INFO L93 Difference]: Finished difference Result 3884 states and 14007 transitions. [2021-02-19 18:39:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:39:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 26 [2021-02-19 18:39:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:18,522 INFO L225 Difference]: With dead ends: 3884 [2021-02-19 18:39:18,522 INFO L226 Difference]: Without dead ends: 3500 [2021-02-19 18:39:18,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:39:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-02-19 18:39:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3025. [2021-02-19 18:39:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.7354497354497354) internal successors, (11296), 3024 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 11296 transitions. [2021-02-19 18:39:18,608 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 11296 transitions. Word has length 26 [2021-02-19 18:39:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:18,609 INFO L480 AbstractCegarLoop]: Abstraction has 3025 states and 11296 transitions. [2021-02-19 18:39:18,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 18:39:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 11296 transitions. [2021-02-19 18:39:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:39:18,618 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:18,618 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:18,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:39:18,835 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash -415570673, now seen corresponding path program 11 times [2021-02-19 18:39:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:18,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120693899] [2021-02-19 18:39:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120693899] [2021-02-19 18:39:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035917702] [2021-02-19 18:39:18,870 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 [2021-02-19 18:39:18,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:39:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:39:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:18,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:18,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:39:18,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062779811] [2021-02-19 18:39:18,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:39:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:39:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:18,935 INFO L87 Difference]: Start difference. First operand 3025 states and 11296 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 18:39:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:19,051 INFO L93 Difference]: Finished difference Result 6472 states and 23938 transitions. [2021-02-19 18:39:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:39:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 26 [2021-02-19 18:39:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:19,074 INFO L225 Difference]: With dead ends: 6472 [2021-02-19 18:39:19,074 INFO L226 Difference]: Without dead ends: 6337 [2021-02-19 18:39:19,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:39:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-02-19 18:39:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 5444. [2021-02-19 18:39:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5444 states, 5443 states have (on average 3.834466286974095) internal successors, (20871), 5443 states have internal predecessors, (20871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5444 states to 5444 states and 20871 transitions. [2021-02-19 18:39:19,242 INFO L78 Accepts]: Start accepts. Automaton has 5444 states and 20871 transitions. Word has length 26 [2021-02-19 18:39:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:19,243 INFO L480 AbstractCegarLoop]: Abstraction has 5444 states and 20871 transitions. [2021-02-19 18:39:19,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 18:39:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5444 states and 20871 transitions. [2021-02-19 18:39:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:39:19,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:19,254 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:19,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:19,455 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:19,455 INFO L82 PathProgramCache]: Analyzing trace with hash 716393291, now seen corresponding path program 12 times [2021-02-19 18:39:19,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:19,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744291354] [2021-02-19 18:39:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:19,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744291354] [2021-02-19 18:39:19,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9351928] [2021-02-19 18:39:19,516 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 [2021-02-19 18:39:19,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:39:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:19,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:19,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:39:19,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883656840] [2021-02-19 18:39:19,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:39:19,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:19,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:39:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:39:19,606 INFO L87 Difference]: Start difference. First operand 5444 states and 20871 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:20,081 INFO L93 Difference]: Finished difference Result 7489 states and 26215 transitions. [2021-02-19 18:39:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:39:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 18:39:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:20,104 INFO L225 Difference]: With dead ends: 7489 [2021-02-19 18:39:20,104 INFO L226 Difference]: Without dead ends: 7451 [2021-02-19 18:39:20,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:39:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-02-19 18:39:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 4848. [2021-02-19 18:39:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4848 states, 4847 states have (on average 3.770786053228801) internal successors, (18277), 4847 states have internal predecessors, (18277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 18277 transitions. [2021-02-19 18:39:20,278 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 18277 transitions. Word has length 26 [2021-02-19 18:39:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:20,278 INFO L480 AbstractCegarLoop]: Abstraction has 4848 states and 18277 transitions. [2021-02-19 18:39:20,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 18277 transitions. [2021-02-19 18:39:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:39:20,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:20,290 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:20,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:20,506 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 120798613, now seen corresponding path program 13 times [2021-02-19 18:39:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:20,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353150260] [2021-02-19 18:39:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353150260] [2021-02-19 18:39:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511219057] [2021-02-19 18:39:20,546 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 [2021-02-19 18:39:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:39:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:20,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:20,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-02-19 18:39:20,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895239383] [2021-02-19 18:39:20,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:39:20,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:39:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:39:20,626 INFO L87 Difference]: Start difference. First operand 4848 states and 18277 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 18:39:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:20,755 INFO L93 Difference]: Finished difference Result 7090 states and 25995 transitions. [2021-02-19 18:39:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:39:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 28 [2021-02-19 18:39:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:20,776 INFO L225 Difference]: With dead ends: 7090 [2021-02-19 18:39:20,776 INFO L226 Difference]: Without dead ends: 6826 [2021-02-19 18:39:20,776 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:39:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-02-19 18:39:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 6194. [2021-02-19 18:39:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 3.650411755207492) internal successors, (22607), 6193 states have internal predecessors, (22607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 22607 transitions. [2021-02-19 18:39:20,918 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 22607 transitions. Word has length 28 [2021-02-19 18:39:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:20,918 INFO L480 AbstractCegarLoop]: Abstraction has 6194 states and 22607 transitions. [2021-02-19 18:39:20,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 18:39:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 22607 transitions. [2021-02-19 18:39:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:39:20,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:20,933 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:21,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:39:21,146 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash 226531849, now seen corresponding path program 14 times [2021-02-19 18:39:21,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:21,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625218142] [2021-02-19 18:39:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625218142] [2021-02-19 18:39:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280517303] [2021-02-19 18:39:21,174 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 [2021-02-19 18:39:21,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:39:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:39:21,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:21,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:39:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085329319] [2021-02-19 18:39:21,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:39:21,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:21,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:39:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:39:21,262 INFO L87 Difference]: Start difference. First operand 6194 states and 22607 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:21,667 INFO L93 Difference]: Finished difference Result 10892 states and 38505 transitions. [2021-02-19 18:39:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:39:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:39:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:21,695 INFO L225 Difference]: With dead ends: 10892 [2021-02-19 18:39:21,696 INFO L226 Difference]: Without dead ends: 10752 [2021-02-19 18:39:21,696 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:39:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2021-02-19 18:39:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9497. [2021-02-19 18:39:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9497 states, 9496 states have (on average 3.6148904802021904) internal successors, (34327), 9496 states have internal predecessors, (34327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9497 states to 9497 states and 34327 transitions. [2021-02-19 18:39:21,961 INFO L78 Accepts]: Start accepts. Automaton has 9497 states and 34327 transitions. Word has length 28 [2021-02-19 18:39:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:21,962 INFO L480 AbstractCegarLoop]: Abstraction has 9497 states and 34327 transitions. [2021-02-19 18:39:21,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 9497 states and 34327 transitions. [2021-02-19 18:39:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:21,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:21,982 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:22,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:22,198 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1167222923, now seen corresponding path program 15 times [2021-02-19 18:39:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:22,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807977164] [2021-02-19 18:39:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807977164] [2021-02-19 18:39:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037994524] [2021-02-19 18:39:22,492 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 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 [2021-02-19 18:39:22,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:39:22,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:39:22,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:22,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:22,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:22,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:22,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:39:22,819 INFO L446 ElimStorePlain]: Different costs {1=[v_C_14], 2=[A, B]} [2021-02-19 18:39:22,832 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-02-19 18:39:22,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:39:22,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:22,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:22,866 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:39:22,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-02-19 18:39:22,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:39:22,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:22,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-02-19 18:39:22,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:39:22,946 INFO L628 ElimStorePlain]: treesize reduction 22, result has 58.5 percent of original size [2021-02-19 18:39:22,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:39:22,954 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:31 [2021-02-19 18:39:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-02-19 18:39:23,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:23,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:23,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:23,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-02-19 18:39:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 18:39:23,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266384864] [2021-02-19 18:39:23,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:39:23,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:39:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:39:23,340 INFO L87 Difference]: Start difference. First operand 9497 states and 34327 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:28,689 INFO L93 Difference]: Finished difference Result 21627 states and 74484 transitions. [2021-02-19 18:39:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:39:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:28,753 INFO L225 Difference]: With dead ends: 21627 [2021-02-19 18:39:28,753 INFO L226 Difference]: Without dead ends: 21422 [2021-02-19 18:39:28,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=901, Invalid=5419, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:39:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21422 states. [2021-02-19 18:39:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21422 to 10014. [2021-02-19 18:39:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 3.592329971037651) internal successors, (35970), 10013 states have internal predecessors, (35970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 35970 transitions. [2021-02-19 18:39:29,134 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 35970 transitions. Word has length 30 [2021-02-19 18:39:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:29,134 INFO L480 AbstractCegarLoop]: Abstraction has 10014 states and 35970 transitions. [2021-02-19 18:39:29,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 35970 transitions. [2021-02-19 18:39:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:29,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:29,157 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:29,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:39:29,366 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1944518219, now seen corresponding path program 16 times [2021-02-19 18:39:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:29,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856443251] [2021-02-19 18:39:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:29,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856443251] [2021-02-19 18:39:29,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249269948] [2021-02-19 18:39:29,580 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 [2021-02-19 18:39:29,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:39:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:29,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:29,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:29,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-02-19 18:39:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:39:29,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:39:29,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-02-19 18:39:29,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:29,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2021-02-19 18:39:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:39:29,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:29,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:29,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:39:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:29,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:29,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-02-19 18:39:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506124131] [2021-02-19 18:39:29,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:39:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:39:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:39:29,897 INFO L87 Difference]: Start difference. First operand 10014 states and 35970 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:30,729 INFO L93 Difference]: Finished difference Result 15241 states and 54239 transitions. [2021-02-19 18:39:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:39:30,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:30,773 INFO L225 Difference]: With dead ends: 15241 [2021-02-19 18:39:30,773 INFO L226 Difference]: Without dead ends: 15214 [2021-02-19 18:39:30,773 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:39:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-02-19 18:39:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 10167. [2021-02-19 18:39:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10167 states, 10166 states have (on average 3.58715325595121) internal successors, (36467), 10166 states have internal predecessors, (36467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 36467 transitions. [2021-02-19 18:39:31,102 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 36467 transitions. Word has length 30 [2021-02-19 18:39:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:31,102 INFO L480 AbstractCegarLoop]: Abstraction has 10167 states and 36467 transitions. [2021-02-19 18:39:31,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 36467 transitions. [2021-02-19 18:39:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:31,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:31,124 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:31,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:39:31,325 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 901101423, now seen corresponding path program 17 times [2021-02-19 18:39:31,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:31,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371632628] [2021-02-19 18:39:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371632628] [2021-02-19 18:39:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624846126] [2021-02-19 18:39:31,586 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 [2021-02-19 18:39:31,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:39:31,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 18:39:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:39:31,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:31,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:31,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:31,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-02-19 18:39:31,939 INFO L446 ElimStorePlain]: Different costs {3=[v_C_18], 5=[A, B]} [2021-02-19 18:39:31,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:31,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-02-19 18:39:31,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:31,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:31,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:31,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:31,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2021-02-19 18:39:31,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:31,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:31,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-02-19 18:39:31,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:32,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:32,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:39:32,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:34 [2021-02-19 18:39:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:32,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 18:39:32,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:32,146 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.0 percent of original size [2021-02-19 18:39:32,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:32,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:15 [2021-02-19 18:39:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:32,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:32,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-02-19 18:39:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749956006] [2021-02-19 18:39:32,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:39:32,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:39:32,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:39:32,205 INFO L87 Difference]: Start difference. First operand 10167 states and 36467 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:33,020 INFO L93 Difference]: Finished difference Result 15225 states and 54145 transitions. [2021-02-19 18:39:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:39:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:33,065 INFO L225 Difference]: With dead ends: 15225 [2021-02-19 18:39:33,065 INFO L226 Difference]: Without dead ends: 15154 [2021-02-19 18:39:33,065 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:39:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15154 states. [2021-02-19 18:39:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15154 to 10149. [2021-02-19 18:39:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10149 states, 10148 states have (on average 3.588194718171068) internal successors, (36413), 10148 states have internal predecessors, (36413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10149 states to 10149 states and 36413 transitions. [2021-02-19 18:39:33,354 INFO L78 Accepts]: Start accepts. Automaton has 10149 states and 36413 transitions. Word has length 30 [2021-02-19 18:39:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:33,355 INFO L480 AbstractCegarLoop]: Abstraction has 10149 states and 36413 transitions. [2021-02-19 18:39:33,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10149 states and 36413 transitions. [2021-02-19 18:39:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:33,376 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:33,376 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:33,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 18:39:33,576 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2095394709, now seen corresponding path program 18 times [2021-02-19 18:39:33,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:33,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81449621] [2021-02-19 18:39:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81449621] [2021-02-19 18:39:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138472768] [2021-02-19 18:39:33,879 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 [2021-02-19 18:39:33,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:39:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:39:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:33,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:33,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:33,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:33,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:33,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:39:34,070 INFO L446 ElimStorePlain]: Different costs {1=[v_C_20], 5=[A, B]} [2021-02-19 18:39:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:34,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:39:34,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-02-19 18:39:34,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:34,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:34,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-02-19 18:39:34,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:34,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:24 [2021-02-19 18:39:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:39:34,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:34,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:34,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:39:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:34,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:34,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:39:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759423241] [2021-02-19 18:39:34,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:39:34,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:39:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:39:34,163 INFO L87 Difference]: Start difference. First operand 10149 states and 36413 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:34,888 INFO L93 Difference]: Finished difference Result 15390 states and 54696 transitions. [2021-02-19 18:39:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:39:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:34,932 INFO L225 Difference]: With dead ends: 15390 [2021-02-19 18:39:34,932 INFO L226 Difference]: Without dead ends: 15255 [2021-02-19 18:39:34,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:39:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2021-02-19 18:39:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 10163. [2021-02-19 18:39:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 3.5874827789805157) internal successors, (36456), 10162 states have internal predecessors, (36456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 36456 transitions. [2021-02-19 18:39:35,254 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 36456 transitions. Word has length 30 [2021-02-19 18:39:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:35,254 INFO L480 AbstractCegarLoop]: Abstraction has 10163 states and 36456 transitions. [2021-02-19 18:39:35,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 36456 transitions. [2021-02-19 18:39:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:35,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:35,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:35,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:39:35,474 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 54708983, now seen corresponding path program 19 times [2021-02-19 18:39:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228302149] [2021-02-19 18:39:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228302149] [2021-02-19 18:39:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311505965] [2021-02-19 18:39:35,752 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 [2021-02-19 18:39:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:35,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:35,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:39:35,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:35,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:39:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:39:35,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:35,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:39:35,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:39:35,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:35,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:35,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-02-19 18:39:36,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:39:36,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:36,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:39:36,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:36,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:36,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:36,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:39:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:36,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:39:36,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947431190] [2021-02-19 18:39:36,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:39:36,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:36,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:39:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:39:36,039 INFO L87 Difference]: Start difference. First operand 10163 states and 36456 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:36,942 INFO L93 Difference]: Finished difference Result 15442 states and 54923 transitions. [2021-02-19 18:39:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:39:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:36,986 INFO L225 Difference]: With dead ends: 15442 [2021-02-19 18:39:36,986 INFO L226 Difference]: Without dead ends: 15414 [2021-02-19 18:39:36,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:39:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15414 states. [2021-02-19 18:39:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15414 to 10184. [2021-02-19 18:39:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10183 states have (on average 3.5871550623588333) internal successors, (36528), 10183 states have internal predecessors, (36528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 36528 transitions. [2021-02-19 18:39:37,262 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 36528 transitions. Word has length 30 [2021-02-19 18:39:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:37,262 INFO L480 AbstractCegarLoop]: Abstraction has 10184 states and 36528 transitions. [2021-02-19 18:39:37,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 36528 transitions. [2021-02-19 18:39:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:37,281 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:37,281 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:37,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:39:37,481 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1064086309, now seen corresponding path program 20 times [2021-02-19 18:39:37,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:37,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148856106] [2021-02-19 18:39:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148856106] [2021-02-19 18:39:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261706198] [2021-02-19 18:39:37,761 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 [2021-02-19 18:39:37,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:37,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:37,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:37,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:37,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-02-19 18:39:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:39:37,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:52 [2021-02-19 18:39:37,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-02-19 18:39:37,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:37,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:39:37,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:37,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:37,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:18 [2021-02-19 18:39:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:39:38,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:38,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:38,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:38,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-02-19 18:39:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:38,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:38,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:39:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137121155] [2021-02-19 18:39:38,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:39:38,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:39:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:39:38,045 INFO L87 Difference]: Start difference. First operand 10184 states and 36528 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:38,906 INFO L93 Difference]: Finished difference Result 15509 states and 55098 transitions. [2021-02-19 18:39:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:39:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:38,952 INFO L225 Difference]: With dead ends: 15509 [2021-02-19 18:39:38,952 INFO L226 Difference]: Without dead ends: 15428 [2021-02-19 18:39:38,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:39:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15428 states. [2021-02-19 18:39:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15428 to 10176. [2021-02-19 18:39:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.5887960687960687) internal successors, (36516), 10175 states have internal predecessors, (36516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36516 transitions. [2021-02-19 18:39:39,172 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36516 transitions. Word has length 30 [2021-02-19 18:39:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:39,173 INFO L480 AbstractCegarLoop]: Abstraction has 10176 states and 36516 transitions. [2021-02-19 18:39:39,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36516 transitions. [2021-02-19 18:39:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:39,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:39,187 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:39,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:39,388 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash -309157291, now seen corresponding path program 21 times [2021-02-19 18:39:39,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:39,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625840513] [2021-02-19 18:39:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:39,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625840513] [2021-02-19 18:39:39,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194115336] [2021-02-19 18:39:39,662 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 [2021-02-19 18:39:39,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:39:39,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:39:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:39,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:39,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:39,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:39,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-02-19 18:39:39,906 INFO L446 ElimStorePlain]: Different costs {1=[v_C_26], 5=[A, B]} [2021-02-19 18:39:39,922 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-02-19 18:39:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:39:39,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:39,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:39,957 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-02-19 18:39:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2021-02-19 18:39:39,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:39:39,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:39,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:39,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:39:40,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:39:40,038 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-02-19 18:39:40,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:39:40,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:33 [2021-02-19 18:39:40,325 INFO L446 ElimStorePlain]: Different costs {0=[C], 2=[v_prenex_1]} [2021-02-19 18:39:40,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:39:40,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:40,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:40,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-02-19 18:39:40,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:40,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:40,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:39:40,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:20 [2021-02-19 18:39:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:40,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:40,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-02-19 18:39:40,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329415973] [2021-02-19 18:39:40,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:39:40,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:40,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:39:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:39:40,433 INFO L87 Difference]: Start difference. First operand 10176 states and 36516 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:43,028 INFO L93 Difference]: Finished difference Result 16941 states and 59595 transitions. [2021-02-19 18:39:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:39:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:43,078 INFO L225 Difference]: With dead ends: 16941 [2021-02-19 18:39:43,078 INFO L226 Difference]: Without dead ends: 16770 [2021-02-19 18:39:43,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=1931, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:39:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16770 states. [2021-02-19 18:39:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16770 to 10358. [2021-02-19 18:39:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 3.588201216568504) internal successors, (37163), 10357 states have internal predecessors, (37163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 37163 transitions. [2021-02-19 18:39:43,326 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 37163 transitions. Word has length 30 [2021-02-19 18:39:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:43,327 INFO L480 AbstractCegarLoop]: Abstraction has 10358 states and 37163 transitions. [2021-02-19 18:39:43,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 37163 transitions. [2021-02-19 18:39:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:43,346 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:43,346 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:43,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:39:43,548 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1410855701, now seen corresponding path program 22 times [2021-02-19 18:39:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238035802] [2021-02-19 18:39:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238035802] [2021-02-19 18:39:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567698642] [2021-02-19 18:39:43,915 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 [2021-02-19 18:39:43,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:39:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:43,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:43,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:43,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:43,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:43,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:39:44,068 INFO L446 ElimStorePlain]: Different costs {1=[v_C_28], 5=[A, B]} [2021-02-19 18:39:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:44,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:39:44,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:44,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-02-19 18:39:44,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:44,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:44,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-02-19 18:39:44,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:44,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-02-19 18:39:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:39:44,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:44,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:44,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:39:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:44,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:44,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-02-19 18:39:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990298061] [2021-02-19 18:39:44,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:39:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:39:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:39:44,197 INFO L87 Difference]: Start difference. First operand 10358 states and 37163 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:45,280 INFO L93 Difference]: Finished difference Result 15587 states and 55443 transitions. [2021-02-19 18:39:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:39:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:45,325 INFO L225 Difference]: With dead ends: 15587 [2021-02-19 18:39:45,326 INFO L226 Difference]: Without dead ends: 15556 [2021-02-19 18:39:45,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:39:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15556 states. [2021-02-19 18:39:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15556 to 10418. [2021-02-19 18:39:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10418 states, 10417 states have (on average 3.5867332245368146) internal successors, (37363), 10417 states have internal predecessors, (37363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 37363 transitions. [2021-02-19 18:39:45,612 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 37363 transitions. Word has length 30 [2021-02-19 18:39:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:45,612 INFO L480 AbstractCegarLoop]: Abstraction has 10418 states and 37363 transitions. [2021-02-19 18:39:45,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 37363 transitions. [2021-02-19 18:39:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:45,633 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:45,633 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:45,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:45,838 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1314080905, now seen corresponding path program 23 times [2021-02-19 18:39:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:45,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225933691] [2021-02-19 18:39:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:46,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225933691] [2021-02-19 18:39:46,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223150636] [2021-02-19 18:39:46,223 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 [2021-02-19 18:39:46,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:39:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:39:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:46,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:46,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-02-19 18:39:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:46,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:39:46,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:46,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-02-19 18:39:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:39:46,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:46,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-02-19 18:39:46,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:39:46,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:39:46,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:46,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:46,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-02-19 18:39:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:46,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:46,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 18:39:46,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855379111] [2021-02-19 18:39:46,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:39:46,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:39:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:39:46,656 INFO L87 Difference]: Start difference. First operand 10418 states and 37363 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:47,654 INFO L93 Difference]: Finished difference Result 14226 states and 50216 transitions. [2021-02-19 18:39:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:39:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:47,694 INFO L225 Difference]: With dead ends: 14226 [2021-02-19 18:39:47,694 INFO L226 Difference]: Without dead ends: 14187 [2021-02-19 18:39:47,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:39:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14187 states. [2021-02-19 18:39:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14187 to 10487. [2021-02-19 18:39:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10487 states, 10486 states have (on average 3.584875071523937) internal successors, (37591), 10486 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10487 states to 10487 states and 37591 transitions. [2021-02-19 18:39:47,919 INFO L78 Accepts]: Start accepts. Automaton has 10487 states and 37591 transitions. Word has length 30 [2021-02-19 18:39:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:47,919 INFO L480 AbstractCegarLoop]: Abstraction has 10487 states and 37591 transitions. [2021-02-19 18:39:47,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10487 states and 37591 transitions. [2021-02-19 18:39:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:47,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:47,939 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:48,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-02-19 18:39:48,154 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1862091099, now seen corresponding path program 24 times [2021-02-19 18:39:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:48,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615870416] [2021-02-19 18:39:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615870416] [2021-02-19 18:39:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807603211] [2021-02-19 18:39:48,568 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 [2021-02-19 18:39:48,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:39:48,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:39:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:39:48,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:48,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-02-19 18:39:48,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:48,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:39:48,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:48,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-02-19 18:39:48,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:39:48,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-02-19 18:39:48,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:48,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:26 [2021-02-19 18:39:48,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:39:48,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:48,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:48,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-02-19 18:39:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:48,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:48,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 18:39:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319320246] [2021-02-19 18:39:48,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:39:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:39:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:39:48,972 INFO L87 Difference]: Start difference. First operand 10487 states and 37591 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:50,229 INFO L93 Difference]: Finished difference Result 14055 states and 49645 transitions. [2021-02-19 18:39:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:39:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:50,269 INFO L225 Difference]: With dead ends: 14055 [2021-02-19 18:39:50,270 INFO L226 Difference]: Without dead ends: 13945 [2021-02-19 18:39:50,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:39:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13945 states. [2021-02-19 18:39:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13945 to 10520. [2021-02-19 18:39:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 3.5842760718699496) internal successors, (37703), 10519 states have internal predecessors, (37703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 37703 transitions. [2021-02-19 18:39:50,497 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 37703 transitions. Word has length 30 [2021-02-19 18:39:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:50,497 INFO L480 AbstractCegarLoop]: Abstraction has 10520 states and 37703 transitions. [2021-02-19 18:39:50,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 37703 transitions. [2021-02-19 18:39:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:50,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:50,517 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:50,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:50,718 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:50,718 INFO L82 PathProgramCache]: Analyzing trace with hash -87620779, now seen corresponding path program 25 times [2021-02-19 18:39:50,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:50,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136483245] [2021-02-19 18:39:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136483245] [2021-02-19 18:39:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490842051] [2021-02-19 18:39:51,054 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 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 [2021-02-19 18:39:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:51,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:51,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:51,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-02-19 18:39:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:39:51,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:51,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-02-19 18:39:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-02-19 18:39:51,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-02-19 18:39:51,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:51,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:20 [2021-02-19 18:39:51,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-02-19 18:39:51,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:51,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:51,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-02-19 18:39:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:51,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:51,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-02-19 18:39:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023823984] [2021-02-19 18:39:51,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:39:51,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:39:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:39:51,365 INFO L87 Difference]: Start difference. First operand 10520 states and 37703 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:52,337 INFO L93 Difference]: Finished difference Result 14024 states and 49557 transitions. [2021-02-19 18:39:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:39:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:52,382 INFO L225 Difference]: With dead ends: 14024 [2021-02-19 18:39:52,382 INFO L226 Difference]: Without dead ends: 13991 [2021-02-19 18:39:52,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:39:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13991 states. [2021-02-19 18:39:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13991 to 10532. [2021-02-19 18:39:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 3.5856993637831165) internal successors, (37761), 10531 states have internal predecessors, (37761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 37761 transitions. [2021-02-19 18:39:52,658 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 37761 transitions. Word has length 30 [2021-02-19 18:39:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:52,659 INFO L480 AbstractCegarLoop]: Abstraction has 10532 states and 37761 transitions. [2021-02-19 18:39:52,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 37761 transitions. [2021-02-19 18:39:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:52,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:52,678 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:52,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 18:39:52,878 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:52,878 INFO L82 PathProgramCache]: Analyzing trace with hash 380319241, now seen corresponding path program 26 times [2021-02-19 18:39:52,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:52,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992464456] [2021-02-19 18:39:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:53,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992464456] [2021-02-19 18:39:53,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986795503] [2021-02-19 18:39:53,127 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 [2021-02-19 18:39:53,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:53,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:39:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:53,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:39:53,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:53,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-02-19 18:39:53,332 INFO L446 ElimStorePlain]: Different costs {1=[v_C_36], 5=[A, B]} [2021-02-19 18:39:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:39:53,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:53,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:53,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-02-19 18:39:53,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:53,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:39:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:39:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-02-19 18:39:53,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:53,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:24 [2021-02-19 18:39:53,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:39:53,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:53,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:53,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:39:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:53,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:53,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:39:53,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144496593] [2021-02-19 18:39:53,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:39:53,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:39:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:39:53,451 INFO L87 Difference]: Start difference. First operand 10532 states and 37761 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:54,405 INFO L93 Difference]: Finished difference Result 16102 states and 57119 transitions. [2021-02-19 18:39:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:39:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:54,454 INFO L225 Difference]: With dead ends: 16102 [2021-02-19 18:39:54,454 INFO L226 Difference]: Without dead ends: 16039 [2021-02-19 18:39:54,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:39:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2021-02-19 18:39:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 10494. [2021-02-19 18:39:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.5870580386924615) internal successors, (37639), 10493 states have internal predecessors, (37639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 37639 transitions. [2021-02-19 18:39:54,710 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 37639 transitions. Word has length 30 [2021-02-19 18:39:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:54,710 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 37639 transitions. [2021-02-19 18:39:54,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 37639 transitions. [2021-02-19 18:39:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:54,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:54,730 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:54,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:54,931 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash -763156697, now seen corresponding path program 27 times [2021-02-19 18:39:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:54,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589715490] [2021-02-19 18:39:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589715490] [2021-02-19 18:39:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999261845] [2021-02-19 18:39:55,238 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 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 [2021-02-19 18:39:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:39:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:39:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:55,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:39:55,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:39:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:39:55,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:39:55,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:39:55,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,595 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-02-19 18:39:55,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2021-02-19 18:39:55,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:39:55,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:39:55,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:39:55,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:55 [2021-02-19 18:39:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:55,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:55,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:39:55,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616566182] [2021-02-19 18:39:55,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:39:55,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:39:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:39:55,777 INFO L87 Difference]: Start difference. First operand 10494 states and 37639 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:56,824 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-02-19 18:39:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:59,334 INFO L93 Difference]: Finished difference Result 16771 states and 59073 transitions. [2021-02-19 18:39:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:39:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:39:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:59,385 INFO L225 Difference]: With dead ends: 16771 [2021-02-19 18:39:59,385 INFO L226 Difference]: Without dead ends: 16638 [2021-02-19 18:39:59,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:39:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-02-19 18:39:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 10514. [2021-02-19 18:39:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10514 states, 10513 states have (on average 3.586892418909921) internal successors, (37709), 10513 states have internal predecessors, (37709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10514 states to 10514 states and 37709 transitions. [2021-02-19 18:39:59,638 INFO L78 Accepts]: Start accepts. Automaton has 10514 states and 37709 transitions. Word has length 30 [2021-02-19 18:39:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:59,638 INFO L480 AbstractCegarLoop]: Abstraction has 10514 states and 37709 transitions. [2021-02-19 18:39:59,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10514 states and 37709 transitions. [2021-02-19 18:39:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:39:59,658 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:59,658 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:59,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:39:59,858 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1386946995, now seen corresponding path program 28 times [2021-02-19 18:39:59,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:59,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746140619] [2021-02-19 18:39:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:00,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746140619] [2021-02-19 18:40:00,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517999438] [2021-02-19 18:40:00,155 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 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 [2021-02-19 18:40:00,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:40:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:00,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:00,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:00,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:00,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-02-19 18:40:00,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:00,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-02-19 18:40:00,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:00,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:00,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:00,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-02-19 18:40:00,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:00,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:00,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:40:00,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:00,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:00,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:40:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:00,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:00,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-02-19 18:40:00,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490379904] [2021-02-19 18:40:00,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:40:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:40:00,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:00,591 INFO L87 Difference]: Start difference. First operand 10514 states and 37709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:01,315 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-02-19 18:40:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:02,097 INFO L93 Difference]: Finished difference Result 16713 states and 59099 transitions. [2021-02-19 18:40:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:40:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:02,160 INFO L225 Difference]: With dead ends: 16713 [2021-02-19 18:40:02,161 INFO L226 Difference]: Without dead ends: 16652 [2021-02-19 18:40:02,161 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:40:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-02-19 18:40:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 10544. [2021-02-19 18:40:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10544 states, 10543 states have (on average 3.5849378734705493) internal successors, (37796), 10543 states have internal predecessors, (37796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10544 states to 10544 states and 37796 transitions. [2021-02-19 18:40:02,447 INFO L78 Accepts]: Start accepts. Automaton has 10544 states and 37796 transitions. Word has length 30 [2021-02-19 18:40:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:02,447 INFO L480 AbstractCegarLoop]: Abstraction has 10544 states and 37796 transitions. [2021-02-19 18:40:02,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 10544 states and 37796 transitions. [2021-02-19 18:40:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:02,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:02,471 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:02,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:02,672 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:02,672 INFO L82 PathProgramCache]: Analyzing trace with hash 268151703, now seen corresponding path program 29 times [2021-02-19 18:40:02,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:02,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324583237] [2021-02-19 18:40:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:03,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324583237] [2021-02-19 18:40:03,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653195973] [2021-02-19 18:40:03,032 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 [2021-02-19 18:40:03,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:40:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:40:03,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:03,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:03,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:03,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:03,359 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:40:03,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2021-02-19 18:40:03,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:03,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:73 [2021-02-19 18:40:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:40:03,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:03,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-02-19 18:40:03,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:03,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:25 [2021-02-19 18:40:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:03,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-02-19 18:40:03,551 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:40:03,569 INFO L628 ElimStorePlain]: treesize reduction 17, result has 56.4 percent of original size [2021-02-19 18:40:03,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:03,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-02-19 18:40:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:03,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:03,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:40:03,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884046071] [2021-02-19 18:40:03,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:40:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:40:03,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:40:03,641 INFO L87 Difference]: Start difference. First operand 10544 states and 37796 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:04,629 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 18:40:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:06,432 INFO L93 Difference]: Finished difference Result 17437 states and 61320 transitions. [2021-02-19 18:40:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:40:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:06,486 INFO L225 Difference]: With dead ends: 17437 [2021-02-19 18:40:06,486 INFO L226 Difference]: Without dead ends: 17238 [2021-02-19 18:40:06,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:40:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2021-02-19 18:40:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 10532. [2021-02-19 18:40:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 3.5855094482955083) internal successors, (37759), 10531 states have internal predecessors, (37759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 37759 transitions. [2021-02-19 18:40:06,743 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 37759 transitions. Word has length 30 [2021-02-19 18:40:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:06,743 INFO L480 AbstractCegarLoop]: Abstraction has 10532 states and 37759 transitions. [2021-02-19 18:40:06,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 37759 transitions. [2021-02-19 18:40:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:06,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:06,764 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:06,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:06,970 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1110387405, now seen corresponding path program 30 times [2021-02-19 18:40:06,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:06,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374415958] [2021-02-19 18:40:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:07,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374415958] [2021-02-19 18:40:07,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111261410] [2021-02-19 18:40:07,119 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 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 [2021-02-19 18:40:07,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:40:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:07,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:07,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:07,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:07,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-02-19 18:40:07,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:07,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:54 [2021-02-19 18:40:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:07,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-02-19 18:40:07,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:07,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-02-19 18:40:07,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:07,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:40:07,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:07,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:07,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-02-19 18:40:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:07,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:07,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:07,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978080649] [2021-02-19 18:40:07,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:07,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:07,463 INFO L87 Difference]: Start difference. First operand 10532 states and 37759 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:07,860 INFO L93 Difference]: Finished difference Result 11495 states and 40806 transitions. [2021-02-19 18:40:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:40:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:07,893 INFO L225 Difference]: With dead ends: 11495 [2021-02-19 18:40:07,893 INFO L226 Difference]: Without dead ends: 11467 [2021-02-19 18:40:07,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-02-19 18:40:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10570. [2021-02-19 18:40:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.58321506291986) internal successors, (37871), 10569 states have internal predecessors, (37871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 37871 transitions. [2021-02-19 18:40:08,106 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 37871 transitions. Word has length 30 [2021-02-19 18:40:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:08,106 INFO L480 AbstractCegarLoop]: Abstraction has 10570 states and 37871 transitions. [2021-02-19 18:40:08,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 37871 transitions. [2021-02-19 18:40:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:08,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:08,126 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:08,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 18:40:08,327 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1764128279, now seen corresponding path program 31 times [2021-02-19 18:40:08,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:08,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235895719] [2021-02-19 18:40:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:08,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235895719] [2021-02-19 18:40:08,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772367344] [2021-02-19 18:40:08,459 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 [2021-02-19 18:40:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:08,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:08,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:08,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-02-19 18:40:08,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:08,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-02-19 18:40:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:08,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:08,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:08,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-02-19 18:40:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:08,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:40:08,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:08,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:08,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:40:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:08,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:08,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:08,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884711473] [2021-02-19 18:40:08,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:08,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:08,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:08,807 INFO L87 Difference]: Start difference. First operand 10570 states and 37871 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:09,246 INFO L93 Difference]: Finished difference Result 11381 states and 40464 transitions. [2021-02-19 18:40:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:40:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:09,279 INFO L225 Difference]: With dead ends: 11381 [2021-02-19 18:40:09,279 INFO L226 Difference]: Without dead ends: 11347 [2021-02-19 18:40:09,280 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:40:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11347 states. [2021-02-19 18:40:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11347 to 10597. [2021-02-19 18:40:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 3.5820120800302) internal successors, (37955), 10596 states have internal predecessors, (37955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 37955 transitions. [2021-02-19 18:40:09,553 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 37955 transitions. Word has length 30 [2021-02-19 18:40:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:09,553 INFO L480 AbstractCegarLoop]: Abstraction has 10597 states and 37955 transitions. [2021-02-19 18:40:09,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 37955 transitions. [2021-02-19 18:40:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:09,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:09,575 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:09,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 18:40:09,782 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash 744310235, now seen corresponding path program 32 times [2021-02-19 18:40:09,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:09,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644246471] [2021-02-19 18:40:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:09,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644246471] [2021-02-19 18:40:09,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605773805] [2021-02-19 18:40:09,924 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) [2021-02-19 18:40:09,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:40:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:09,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:09,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:10,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:10,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:10,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-02-19 18:40:10,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:10,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:54 [2021-02-19 18:40:10,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-02-19 18:40:10,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-02-19 18:40:10,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:10,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,227 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:24 [2021-02-19 18:40:10,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:10,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:10,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:10,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:40:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:10,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:10,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:10,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094423273] [2021-02-19 18:40:10,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:10,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:10,293 INFO L87 Difference]: Start difference. First operand 10597 states and 37955 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:10,741 INFO L93 Difference]: Finished difference Result 11584 states and 41048 transitions. [2021-02-19 18:40:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:40:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:10,773 INFO L225 Difference]: With dead ends: 11584 [2021-02-19 18:40:10,773 INFO L226 Difference]: Without dead ends: 11535 [2021-02-19 18:40:10,773 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:40:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11535 states. [2021-02-19 18:40:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11535 to 10601. [2021-02-19 18:40:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.5827358490566037) internal successors, (37977), 10600 states have internal predecessors, (37977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 37977 transitions. [2021-02-19 18:40:10,980 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 37977 transitions. Word has length 30 [2021-02-19 18:40:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:10,981 INFO L480 AbstractCegarLoop]: Abstraction has 10601 states and 37977 transitions. [2021-02-19 18:40:10,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 37977 transitions. [2021-02-19 18:40:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:11,003 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:11,003 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:11,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:40:11,203 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2119050897, now seen corresponding path program 33 times [2021-02-19 18:40:11,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:11,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521722786] [2021-02-19 18:40:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521722786] [2021-02-19 18:40:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874981387] [2021-02-19 18:40:11,556 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 [2021-02-19 18:40:11,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:40:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:11,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 18:40:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:11,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:11,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:11,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:11,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:11,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:11,968 INFO L446 ElimStorePlain]: Different costs {0=[v_C_50], 2=[A, B]} [2021-02-19 18:40:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:40:11,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:11,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:12,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-02-19 18:40:12,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:40:12,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:12,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-02-19 18:40:12,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 18:40:12,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:12,062 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:30 [2021-02-19 18:40:12,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 9 treesize of output 14 [2021-02-19 18:40:12,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:40:12,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 18:40:12,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:40:12,283 INFO L628 ElimStorePlain]: treesize reduction 9, result has 87.1 percent of original size [2021-02-19 18:40:12,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:40:12,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:71 [2021-02-19 18:40:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:12,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:12,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-02-19 18:40:12,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047705536] [2021-02-19 18:40:12,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:40:12,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:40:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:40:12,384 INFO L87 Difference]: Start difference. First operand 10601 states and 37977 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:13,602 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 18:40:14,360 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 18:40:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:16,426 INFO L93 Difference]: Finished difference Result 16921 states and 59570 transitions. [2021-02-19 18:40:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:40:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:16,478 INFO L225 Difference]: With dead ends: 16921 [2021-02-19 18:40:16,479 INFO L226 Difference]: Without dead ends: 16739 [2021-02-19 18:40:16,479 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=422, Invalid=2770, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:40:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16739 states. [2021-02-19 18:40:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16739 to 10629. [2021-02-19 18:40:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.5825178773052313) internal successors, (38075), 10628 states have internal predecessors, (38075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 38075 transitions. [2021-02-19 18:40:16,734 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 38075 transitions. Word has length 30 [2021-02-19 18:40:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:16,734 INFO L480 AbstractCegarLoop]: Abstraction has 10629 states and 38075 transitions. [2021-02-19 18:40:16,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 38075 transitions. [2021-02-19 18:40:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:16,755 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:16,755 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:16,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:16,956 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash -25812707, now seen corresponding path program 34 times [2021-02-19 18:40:16,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:16,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959424054] [2021-02-19 18:40:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:17,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959424054] [2021-02-19 18:40:17,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159901071] [2021-02-19 18:40:17,288 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 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 [2021-02-19 18:40:17,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:40:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:17,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:17,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:17,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:40:17,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:17,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:40:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:40:17,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:17,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-02-19 18:40:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:17,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:17,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:40:17,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:17,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:17,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-02-19 18:40:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-02-19 18:40:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011696311] [2021-02-19 18:40:17,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:40:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:40:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:17,642 INFO L87 Difference]: Start difference. First operand 10629 states and 38075 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:19,227 INFO L93 Difference]: Finished difference Result 17261 states and 60804 transitions. [2021-02-19 18:40:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:40:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:19,281 INFO L225 Difference]: With dead ends: 17261 [2021-02-19 18:40:19,282 INFO L226 Difference]: Without dead ends: 17200 [2021-02-19 18:40:19,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:40:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17200 states. [2021-02-19 18:40:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17200 to 10673. [2021-02-19 18:40:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10673 states, 10672 states have (on average 3.58095952023988) internal successors, (38216), 10672 states have internal predecessors, (38216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10673 states to 10673 states and 38216 transitions. [2021-02-19 18:40:19,540 INFO L78 Accepts]: Start accepts. Automaton has 10673 states and 38216 transitions. Word has length 30 [2021-02-19 18:40:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:19,540 INFO L480 AbstractCegarLoop]: Abstraction has 10673 states and 38216 transitions. [2021-02-19 18:40:19,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10673 states and 38216 transitions. [2021-02-19 18:40:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:19,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:19,561 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:19,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:19,763 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1144607999, now seen corresponding path program 35 times [2021-02-19 18:40:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:19,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114803484] [2021-02-19 18:40:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:20,064 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:40:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114803484] [2021-02-19 18:40:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633404495] [2021-02-19 18:40:20,239 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 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 [2021-02-19 18:40:20,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:40:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:40:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:20,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:20,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:20,564 INFO L354 Elim1Store]: treesize reduction 76, result has 14.6 percent of original size [2021-02-19 18:40:20,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 116 [2021-02-19 18:40:20,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:20,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:157, output treesize:73 [2021-02-19 18:40:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2021-02-19 18:40:20,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:20,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 51 [2021-02-19 18:40:20,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:20,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:169, output treesize:68 [2021-02-19 18:40:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:20,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:20,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-02-19 18:40:20,806 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:40:20,829 INFO L628 ElimStorePlain]: treesize reduction 20, result has 52.4 percent of original size [2021-02-19 18:40:20,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:20,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-02-19 18:40:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:20,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:20,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:40:20,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314018589] [2021-02-19 18:40:20,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:40:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:40:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:40:20,912 INFO L87 Difference]: Start difference. First operand 10673 states and 38216 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:21,759 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:40:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:23,531 INFO L93 Difference]: Finished difference Result 17422 states and 61248 transitions. [2021-02-19 18:40:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:40:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:23,584 INFO L225 Difference]: With dead ends: 17422 [2021-02-19 18:40:23,584 INFO L226 Difference]: Without dead ends: 17254 [2021-02-19 18:40:23,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:40:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2021-02-19 18:40:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 10655. [2021-02-19 18:40:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 10654 states have (on average 3.5826919466866904) internal successors, (38170), 10654 states have internal predecessors, (38170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 38170 transitions. [2021-02-19 18:40:23,844 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 38170 transitions. Word has length 30 [2021-02-19 18:40:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:23,844 INFO L480 AbstractCegarLoop]: Abstraction has 10655 states and 38170 transitions. [2021-02-19 18:40:23,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 38170 transitions. [2021-02-19 18:40:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:23,866 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:23,866 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:24,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-02-19 18:40:24,067 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1758431847, now seen corresponding path program 36 times [2021-02-19 18:40:24,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:24,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833859103] [2021-02-19 18:40:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:24,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833859103] [2021-02-19 18:40:24,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016923328] [2021-02-19 18:40:24,432 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 [2021-02-19 18:40:24,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:40:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:40:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:24,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:24,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:40:24,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:40:24,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 18:40:24,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-02-19 18:40:24,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 18:40:24,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:40:24,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:24,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:24,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:53 [2021-02-19 18:40:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 18:40:24,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789428277] [2021-02-19 18:40:24,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:40:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:40:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:40:24,951 INFO L87 Difference]: Start difference. First operand 10655 states and 38170 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:25,761 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-02-19 18:40:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:27,048 INFO L93 Difference]: Finished difference Result 17158 states and 60402 transitions. [2021-02-19 18:40:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:40:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:27,098 INFO L225 Difference]: With dead ends: 17158 [2021-02-19 18:40:27,099 INFO L226 Difference]: Without dead ends: 17015 [2021-02-19 18:40:27,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:40:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2021-02-19 18:40:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 10667. [2021-02-19 18:40:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10667 states, 10666 states have (on average 3.5827864241515095) internal successors, (38214), 10666 states have internal predecessors, (38214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10667 states to 10667 states and 38214 transitions. [2021-02-19 18:40:27,370 INFO L78 Accepts]: Start accepts. Automaton has 10667 states and 38214 transitions. Word has length 30 [2021-02-19 18:40:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:27,370 INFO L480 AbstractCegarLoop]: Abstraction has 10667 states and 38214 transitions. [2021-02-19 18:40:27,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10667 states and 38214 transitions. [2021-02-19 18:40:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:27,393 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:27,393 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:27,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:27,602 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -750298031, now seen corresponding path program 37 times [2021-02-19 18:40:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:27,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351263213] [2021-02-19 18:40:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:27,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351263213] [2021-02-19 18:40:27,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497196928] [2021-02-19 18:40:27,955 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 [2021-02-19 18:40:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:27,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:28,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:28,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:28,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:28,226 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 2=[v_C_58]} [2021-02-19 18:40:28,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:40:28,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:40:28,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:28,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:40:28,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 18:40:28,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:28,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,270 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-02-19 18:40:28,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:28,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:28,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:28,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:40:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:28,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:28,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-02-19 18:40:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357358889] [2021-02-19 18:40:28,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:40:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:40:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:28,345 INFO L87 Difference]: Start difference. First operand 10667 states and 38214 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:29,872 INFO L93 Difference]: Finished difference Result 16652 states and 58930 transitions. [2021-02-19 18:40:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:40:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:29,929 INFO L225 Difference]: With dead ends: 16652 [2021-02-19 18:40:29,929 INFO L226 Difference]: Without dead ends: 16575 [2021-02-19 18:40:29,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:40:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-02-19 18:40:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 10705. [2021-02-19 18:40:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 10704 states have (on average 3.582772795216741) internal successors, (38350), 10704 states have internal predecessors, (38350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 38350 transitions. [2021-02-19 18:40:30,191 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 38350 transitions. Word has length 30 [2021-02-19 18:40:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:30,192 INFO L480 AbstractCegarLoop]: Abstraction has 10705 states and 38350 transitions. [2021-02-19 18:40:30,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 38350 transitions. [2021-02-19 18:40:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:30,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:30,213 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:30,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:30,414 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 969714961, now seen corresponding path program 38 times [2021-02-19 18:40:30,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:30,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248258373] [2021-02-19 18:40:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:30,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248258373] [2021-02-19 18:40:30,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436324014] [2021-02-19 18:40:30,690 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 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 [2021-02-19 18:40:30,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:40:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:40:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:30,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:30,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:30,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:30,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:30,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:30,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-02-19 18:40:30,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:30,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:30,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:30,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-02-19 18:40:30,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:30,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2021-02-19 18:40:30,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:30,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:31,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:31,000 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-02-19 18:40:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:31,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:31,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:31,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:31,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-02-19 18:40:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:31,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:31,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 18:40:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006735747] [2021-02-19 18:40:31,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:40:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:40:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:40:31,150 INFO L87 Difference]: Start difference. First operand 10705 states and 38350 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:32,185 INFO L93 Difference]: Finished difference Result 16383 states and 58155 transitions. [2021-02-19 18:40:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:40:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:32,242 INFO L225 Difference]: With dead ends: 16383 [2021-02-19 18:40:32,243 INFO L226 Difference]: Without dead ends: 16356 [2021-02-19 18:40:32,243 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:40:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16356 states. [2021-02-19 18:40:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16356 to 10811. [2021-02-19 18:40:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10811 states, 10810 states have (on average 3.582053654024052) internal successors, (38722), 10810 states have internal predecessors, (38722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 38722 transitions. [2021-02-19 18:40:32,518 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 38722 transitions. Word has length 30 [2021-02-19 18:40:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:32,518 INFO L480 AbstractCegarLoop]: Abstraction has 10811 states and 38722 transitions. [2021-02-19 18:40:32,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 38722 transitions. [2021-02-19 18:40:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:32,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:32,542 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:32,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:32,758 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1755221645, now seen corresponding path program 39 times [2021-02-19 18:40:32,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:32,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702161299] [2021-02-19 18:40:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:33,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702161299] [2021-02-19 18:40:33,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736027710] [2021-02-19 18:40:33,013 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 [2021-02-19 18:40:33,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:40:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:40:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:33,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:33,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:33,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:33,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:33,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-02-19 18:40:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:33,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:40:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:33,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:33,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:48 [2021-02-19 18:40:33,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:33,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:40:33,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:33,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:33,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:40:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:33,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:33,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-02-19 18:40:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721156568] [2021-02-19 18:40:33,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:40:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:40:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:33,576 INFO L87 Difference]: Start difference. First operand 10811 states and 38722 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:34,587 INFO L93 Difference]: Finished difference Result 11960 states and 42339 transitions. [2021-02-19 18:40:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:40:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:34,622 INFO L225 Difference]: With dead ends: 11960 [2021-02-19 18:40:34,623 INFO L226 Difference]: Without dead ends: 11927 [2021-02-19 18:40:34,623 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:40:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11927 states. [2021-02-19 18:40:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11927 to 10850. [2021-02-19 18:40:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 3.5809752050880266) internal successors, (38850), 10849 states have internal predecessors, (38850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 38850 transitions. [2021-02-19 18:40:34,834 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 38850 transitions. Word has length 30 [2021-02-19 18:40:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:34,834 INFO L480 AbstractCegarLoop]: Abstraction has 10850 states and 38850 transitions. [2021-02-19 18:40:34,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 38850 transitions. [2021-02-19 18:40:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:34,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:34,854 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:35,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 18:40:35,055 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1420950359, now seen corresponding path program 40 times [2021-02-19 18:40:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:35,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207036103] [2021-02-19 18:40:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207036103] [2021-02-19 18:40:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366659976] [2021-02-19 18:40:35,286 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 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 [2021-02-19 18:40:35,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:40:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:35,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:35,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:35,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:35,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:35,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:35,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-02-19 18:40:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2021-02-19 18:40:35,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:35,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 51 [2021-02-19 18:40:35,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:35,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:57 [2021-02-19 18:40:35,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:35,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:35,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:35,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:40:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:35,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:35,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-02-19 18:40:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981607522] [2021-02-19 18:40:35,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:40:35,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:40:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:40:35,710 INFO L87 Difference]: Start difference. First operand 10850 states and 38850 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:36,363 INFO L93 Difference]: Finished difference Result 11577 states and 41085 transitions. [2021-02-19 18:40:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:40:36,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:36,395 INFO L225 Difference]: With dead ends: 11577 [2021-02-19 18:40:36,396 INFO L226 Difference]: Without dead ends: 11504 [2021-02-19 18:40:36,396 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2021-02-19 18:40:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 10850. [2021-02-19 18:40:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 3.5809752050880266) internal successors, (38850), 10849 states have internal predecessors, (38850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 38850 transitions. [2021-02-19 18:40:36,615 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 38850 transitions. Word has length 30 [2021-02-19 18:40:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:36,615 INFO L480 AbstractCegarLoop]: Abstraction has 10850 states and 38850 transitions. [2021-02-19 18:40:36,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 38850 transitions. [2021-02-19 18:40:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:36,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:36,638 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:36,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:36,838 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash -528761519, now seen corresponding path program 41 times [2021-02-19 18:40:36,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:36,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077943896] [2021-02-19 18:40:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077943896] [2021-02-19 18:40:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906055085] [2021-02-19 18:40:37,070 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 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 [2021-02-19 18:40:37,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:40:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:40:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:37,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:37,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-02-19 18:40:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:37,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:37,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:37,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-02-19 18:40:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:37,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-02-19 18:40:37,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:37,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:40:37,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:37,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,424 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:28 [2021-02-19 18:40:37,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:40:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:37,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:40:37,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-02-19 18:40:37,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:37,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:37,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-02-19 18:40:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:37,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:37,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:40:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461010692] [2021-02-19 18:40:37,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:40:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:40:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:40:37,635 INFO L87 Difference]: Start difference. First operand 10850 states and 38850 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:38,448 INFO L93 Difference]: Finished difference Result 11507 states and 40815 transitions. [2021-02-19 18:40:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:40:38,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:38,481 INFO L225 Difference]: With dead ends: 11507 [2021-02-19 18:40:38,481 INFO L226 Difference]: Without dead ends: 11482 [2021-02-19 18:40:38,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:40:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-02-19 18:40:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 10869. [2021-02-19 18:40:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10869 states, 10868 states have (on average 3.5813397129186604) internal successors, (38922), 10868 states have internal predecessors, (38922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 38922 transitions. [2021-02-19 18:40:38,699 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 38922 transitions. Word has length 30 [2021-02-19 18:40:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:38,699 INFO L480 AbstractCegarLoop]: Abstraction has 10869 states and 38922 transitions. [2021-02-19 18:40:38,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 38922 transitions. [2021-02-19 18:40:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:38,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:38,720 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:38,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:38,920 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2037490099, now seen corresponding path program 42 times [2021-02-19 18:40:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749999235] [2021-02-19 18:40:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:39,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749999235] [2021-02-19 18:40:39,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920258144] [2021-02-19 18:40:39,092 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 [2021-02-19 18:40:39,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:40:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:39,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:39,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:39,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:40:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:39,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-02-19 18:40:39,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:39,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-02-19 18:40:39,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:39,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:40:39,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:39,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:39,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-02-19 18:40:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:39,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:39,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:39,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990256521] [2021-02-19 18:40:39,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:39,501 INFO L87 Difference]: Start difference. First operand 10869 states and 38922 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:39,956 INFO L93 Difference]: Finished difference Result 12035 states and 42730 transitions. [2021-02-19 18:40:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:40:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:39,991 INFO L225 Difference]: With dead ends: 12035 [2021-02-19 18:40:39,992 INFO L226 Difference]: Without dead ends: 12002 [2021-02-19 18:40:39,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-02-19 18:40:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 10946. [2021-02-19 18:40:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10946 states, 10945 states have (on average 3.5811786203746) internal successors, (39196), 10945 states have internal predecessors, (39196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10946 states to 10946 states and 39196 transitions. [2021-02-19 18:40:40,223 INFO L78 Accepts]: Start accepts. Automaton has 10946 states and 39196 transitions. Word has length 30 [2021-02-19 18:40:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:40,223 INFO L480 AbstractCegarLoop]: Abstraction has 10946 states and 39196 transitions. [2021-02-19 18:40:40,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 10946 states and 39196 transitions. [2021-02-19 18:40:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:40,245 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:40,245 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:40,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 18:40:40,446 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash 617038487, now seen corresponding path program 43 times [2021-02-19 18:40:40,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:40,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645438799] [2021-02-19 18:40:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:40,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645438799] [2021-02-19 18:40:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016132901] [2021-02-19 18:40:40,602 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 [2021-02-19 18:40:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:40,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:40,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:40,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:40,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:40,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:40,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:40:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:40,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:40,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:40,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-02-19 18:40:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:40,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:40:40,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:40,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:40,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-02-19 18:40:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:41,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:41,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:41,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858534927] [2021-02-19 18:40:41,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:41,031 INFO L87 Difference]: Start difference. First operand 10946 states and 39196 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:41,653 INFO L93 Difference]: Finished difference Result 11961 states and 42504 transitions. [2021-02-19 18:40:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:40:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:41,692 INFO L225 Difference]: With dead ends: 11961 [2021-02-19 18:40:41,692 INFO L226 Difference]: Without dead ends: 11918 [2021-02-19 18:40:41,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-02-19 18:40:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 11015. [2021-02-19 18:40:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 3.5818957690212456) internal successors, (39451), 11014 states have internal predecessors, (39451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 39451 transitions. [2021-02-19 18:40:41,941 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 39451 transitions. Word has length 30 [2021-02-19 18:40:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:41,941 INFO L480 AbstractCegarLoop]: Abstraction has 11015 states and 39451 transitions. [2021-02-19 18:40:41,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 39451 transitions. [2021-02-19 18:40:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:41,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:41,963 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:42,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 18:40:42,164 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -402779557, now seen corresponding path program 44 times [2021-02-19 18:40:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:42,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765990463] [2021-02-19 18:40:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765990463] [2021-02-19 18:40:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196487474] [2021-02-19 18:40:42,341 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) [2021-02-19 18:40:42,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:40:42,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:42,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:42,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:42,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:42,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:42,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:42,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:40:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:42,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:42,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-02-19 18:40:42,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:42,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-02-19 18:40:42,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:42,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:42,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:42,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:40:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:42,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:42,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:42,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160236595] [2021-02-19 18:40:42,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:42,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:42,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:42,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:42,802 INFO L87 Difference]: Start difference. First operand 11015 states and 39451 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:43,477 INFO L93 Difference]: Finished difference Result 11914 states and 42340 transitions. [2021-02-19 18:40:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:40:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:43,512 INFO L225 Difference]: With dead ends: 11914 [2021-02-19 18:40:43,512 INFO L226 Difference]: Without dead ends: 11881 [2021-02-19 18:40:43,512 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-02-19 18:40:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 11039. [2021-02-19 18:40:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11039 states, 11038 states have (on average 3.5844355861569124) internal successors, (39565), 11038 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11039 states to 11039 states and 39565 transitions. [2021-02-19 18:40:43,734 INFO L78 Accepts]: Start accepts. Automaton has 11039 states and 39565 transitions. Word has length 30 [2021-02-19 18:40:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:43,734 INFO L480 AbstractCegarLoop]: Abstraction has 11039 states and 39565 transitions. [2021-02-19 18:40:43,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11039 states and 39565 transitions. [2021-02-19 18:40:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:43,757 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:43,758 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:43,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 18:40:43,958 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash -450335215, now seen corresponding path program 45 times [2021-02-19 18:40:43,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:43,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739248913] [2021-02-19 18:40:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:44,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739248913] [2021-02-19 18:40:44,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789715963] [2021-02-19 18:40:44,122 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 [2021-02-19 18:40:44,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:40:44,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:40:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:44,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:40:44,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-02-19 18:40:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:44,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-02-19 18:40:44,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-02-19 18:40:44,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:129 [2021-02-19 18:40:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:40:44,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:40:44,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:44,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:44,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:40:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:44,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:44,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-02-19 18:40:44,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621571117] [2021-02-19 18:40:44,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:40:44,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:40:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:40:44,875 INFO L87 Difference]: Start difference. First operand 11039 states and 39565 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:46,149 INFO L93 Difference]: Finished difference Result 11784 states and 41867 transitions. [2021-02-19 18:40:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:40:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:46,183 INFO L225 Difference]: With dead ends: 11784 [2021-02-19 18:40:46,184 INFO L226 Difference]: Without dead ends: 11751 [2021-02-19 18:40:46,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:40:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2021-02-19 18:40:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 11098. [2021-02-19 18:40:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11098 states, 11097 states have (on average 3.58304046138596) internal successors, (39761), 11097 states have internal predecessors, (39761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11098 states to 11098 states and 39761 transitions. [2021-02-19 18:40:46,411 INFO L78 Accepts]: Start accepts. Automaton has 11098 states and 39761 transitions. Word has length 30 [2021-02-19 18:40:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:46,411 INFO L480 AbstractCegarLoop]: Abstraction has 11098 states and 39761 transitions. [2021-02-19 18:40:46,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11098 states and 39761 transitions. [2021-02-19 18:40:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:46,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:46,432 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:46,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:46,633 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1470153259, now seen corresponding path program 46 times [2021-02-19 18:40:46,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:46,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034168627] [2021-02-19 18:40:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034168627] [2021-02-19 18:40:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651932501] [2021-02-19 18:40:46,795 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 [2021-02-19 18:40:46,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:40:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:46,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:40:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:46,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:46,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:46,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:46,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:40:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:46,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:46,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:46,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:46,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:40:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 18:40:47,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:47,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:47,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-02-19 18:40:47,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:47,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:47,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:47,163 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-02-19 18:40:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:47,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:47,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:47,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:47,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-02-19 18:40:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:47,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:40:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747061883] [2021-02-19 18:40:47,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:40:47,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:40:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:47,245 INFO L87 Difference]: Start difference. First operand 11098 states and 39761 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:47,673 INFO L93 Difference]: Finished difference Result 11789 states and 41953 transitions. [2021-02-19 18:40:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:40:47,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:47,711 INFO L225 Difference]: With dead ends: 11789 [2021-02-19 18:40:47,711 INFO L226 Difference]: Without dead ends: 11707 [2021-02-19 18:40:47,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11707 states. [2021-02-19 18:40:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11707 to 11144. [2021-02-19 18:40:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11143 states have (on average 3.5822489455263393) internal successors, (39917), 11143 states have internal predecessors, (39917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 39917 transitions. [2021-02-19 18:40:47,937 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 39917 transitions. Word has length 30 [2021-02-19 18:40:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:47,937 INFO L480 AbstractCegarLoop]: Abstraction has 11144 states and 39917 transitions. [2021-02-19 18:40:47,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 39917 transitions. [2021-02-19 18:40:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:40:47,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:47,960 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:48,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:48,160 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605201, now seen corresponding path program 47 times [2021-02-19 18:40:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697342800] [2021-02-19 18:40:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:48,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697342800] [2021-02-19 18:40:48,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088174882] [2021-02-19 18:40:48,330 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 [2021-02-19 18:40:48,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:40:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:40:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:40:48,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:48,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-02-19 18:40:48,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:40:48,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:40:48,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:48,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-02-19 18:40:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-02-19 18:40:48,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 18:40:48,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:48,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,844 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:21 [2021-02-19 18:40:48,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 18:40:48,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:40:48,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:40:48,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-02-19 18:40:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:48,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:48,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 18:40:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134580995] [2021-02-19 18:40:48,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:40:48,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:48,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:40:48,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:40:48,984 INFO L87 Difference]: Start difference. First operand 11144 states and 39917 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:49,612 INFO L93 Difference]: Finished difference Result 11910 states and 42307 transitions. [2021-02-19 18:40:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:40:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:40:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:49,643 INFO L225 Difference]: With dead ends: 11910 [2021-02-19 18:40:49,643 INFO L226 Difference]: Without dead ends: 11877 [2021-02-19 18:40:49,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:40:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11877 states. [2021-02-19 18:40:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11877 to 11145. [2021-02-19 18:40:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11144 states have (on average 3.5860552763819094) internal successors, (39963), 11144 states have internal predecessors, (39963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 39963 transitions. [2021-02-19 18:40:49,851 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 39963 transitions. Word has length 30 [2021-02-19 18:40:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:49,851 INFO L480 AbstractCegarLoop]: Abstraction has 11145 states and 39963 transitions. [2021-02-19 18:40:49,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 39963 transitions. [2021-02-19 18:40:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:40:49,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:49,870 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:50,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:50,071 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1116172691, now seen corresponding path program 48 times [2021-02-19 18:40:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:50,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467524735] [2021-02-19 18:40:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:40:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467524735] [2021-02-19 18:40:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221596325] [2021-02-19 18:40:50,123 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 [2021-02-19 18:40:50,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:40:50,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:40:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:40:50,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:50,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:40:50,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682593839] [2021-02-19 18:40:50,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:40:50,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:40:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:40:50,232 INFO L87 Difference]: Start difference. First operand 11145 states and 39963 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:40:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:50,558 INFO L93 Difference]: Finished difference Result 24681 states and 86911 transitions. [2021-02-19 18:40:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:40:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2021-02-19 18:40:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:50,620 INFO L225 Difference]: With dead ends: 24681 [2021-02-19 18:40:50,620 INFO L226 Difference]: Without dead ends: 24330 [2021-02-19 18:40:50,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:40:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24330 states. [2021-02-19 18:40:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24330 to 14913. [2021-02-19 18:40:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14913 states, 14912 states have (on average 3.6058878755364807) internal successors, (53771), 14912 states have internal predecessors, (53771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14913 states to 14913 states and 53771 transitions. [2021-02-19 18:40:51,031 INFO L78 Accepts]: Start accepts. Automaton has 14913 states and 53771 transitions. Word has length 32 [2021-02-19 18:40:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:51,032 INFO L480 AbstractCegarLoop]: Abstraction has 14913 states and 53771 transitions. [2021-02-19 18:40:51,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:40:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 14913 states and 53771 transitions. [2021-02-19 18:40:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:40:51,066 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:51,066 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:51,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:51,267 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1947502039, now seen corresponding path program 49 times [2021-02-19 18:40:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:51,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257656381] [2021-02-19 18:40:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:40:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257656381] [2021-02-19 18:40:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402801440] [2021-02-19 18:40:51,319 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) [2021-02-19 18:40:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:40:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:40:51,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:51,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-02-19 18:40:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333047194] [2021-02-19 18:40:51,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:40:51,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:40:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:40:51,470 INFO L87 Difference]: Start difference. First operand 14913 states and 53771 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:54,102 INFO L93 Difference]: Finished difference Result 63428 states and 222186 transitions. [2021-02-19 18:40:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:40:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:40:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:54,366 INFO L225 Difference]: With dead ends: 63428 [2021-02-19 18:40:54,367 INFO L226 Difference]: Without dead ends: 61736 [2021-02-19 18:40:54,367 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1710, Invalid=5430, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:40:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61736 states. [2021-02-19 18:40:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61736 to 31533. [2021-02-19 18:40:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31533 states, 31532 states have (on average 3.6678612203475836) internal successors, (115655), 31532 states have internal predecessors, (115655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31533 states to 31533 states and 115655 transitions. [2021-02-19 18:40:55,462 INFO L78 Accepts]: Start accepts. Automaton has 31533 states and 115655 transitions. Word has length 32 [2021-02-19 18:40:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:55,462 INFO L480 AbstractCegarLoop]: Abstraction has 31533 states and 115655 transitions. [2021-02-19 18:40:55,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 31533 states and 115655 transitions. [2021-02-19 18:40:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:40:55,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:55,534 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:55,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 18:40:55,734 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:55,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1845768471, now seen corresponding path program 50 times [2021-02-19 18:40:55,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:55,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203236501] [2021-02-19 18:40:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:40:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203236501] [2021-02-19 18:40:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380691387] [2021-02-19 18:40:55,774 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 [2021-02-19 18:40:55,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:40:55,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:40:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:55,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:55,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-02-19 18:40:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199245218] [2021-02-19 18:40:55,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:40:55,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:40:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:40:55,900 INFO L87 Difference]: Start difference. First operand 31533 states and 115655 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:57,052 INFO L93 Difference]: Finished difference Result 53244 states and 184508 transitions. [2021-02-19 18:40:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:40:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:40:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:57,262 INFO L225 Difference]: With dead ends: 53244 [2021-02-19 18:40:57,262 INFO L226 Difference]: Without dead ends: 52760 [2021-02-19 18:40:57,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:40:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52760 states. [2021-02-19 18:40:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52760 to 36994. [2021-02-19 18:40:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36994 states, 36993 states have (on average 3.7014029681291056) internal successors, (136926), 36993 states have internal predecessors, (136926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36994 states to 36994 states and 136926 transitions. [2021-02-19 18:40:59,003 INFO L78 Accepts]: Start accepts. Automaton has 36994 states and 136926 transitions. Word has length 32 [2021-02-19 18:40:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:59,003 INFO L480 AbstractCegarLoop]: Abstraction has 36994 states and 136926 transitions. [2021-02-19 18:40:59,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36994 states and 136926 transitions. [2021-02-19 18:40:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:40:59,094 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:59,094 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:59,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 18:40:59,310 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:59,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2128706323, now seen corresponding path program 51 times [2021-02-19 18:40:59,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:59,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571233134] [2021-02-19 18:40:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:59,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571233134] [2021-02-19 18:40:59,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122809203] [2021-02-19 18:40:59,388 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 [2021-02-19 18:40:59,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:40:59,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:40:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:40:59,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:59,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2021-02-19 18:40:59,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39873267] [2021-02-19 18:40:59,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:40:59,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:40:59,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:40:59,540 INFO L87 Difference]: Start difference. First operand 36994 states and 136926 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:59,871 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-02-19 18:41:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:02,471 INFO L93 Difference]: Finished difference Result 88819 states and 308732 transitions. [2021-02-19 18:41:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:41:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:03,018 INFO L225 Difference]: With dead ends: 88819 [2021-02-19 18:41:03,019 INFO L226 Difference]: Without dead ends: 87899 [2021-02-19 18:41:03,019 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1502, Invalid=4818, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:41:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87899 states. [2021-02-19 18:41:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87899 to 49755. [2021-02-19 18:41:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49755 states, 49754 states have (on average 3.7058929935281584) internal successors, (184383), 49754 states have internal predecessors, (184383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49755 states to 49755 states and 184383 transitions. [2021-02-19 18:41:05,099 INFO L78 Accepts]: Start accepts. Automaton has 49755 states and 184383 transitions. Word has length 32 [2021-02-19 18:41:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:05,099 INFO L480 AbstractCegarLoop]: Abstraction has 49755 states and 184383 transitions. [2021-02-19 18:41:05,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 49755 states and 184383 transitions. [2021-02-19 18:41:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:05,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:05,455 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:05,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 18:41:05,656 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:05,656 INFO L82 PathProgramCache]: Analyzing trace with hash 901184277, now seen corresponding path program 52 times [2021-02-19 18:41:05,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:05,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644776042] [2021-02-19 18:41:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:41:05,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644776042] [2021-02-19 18:41:05,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572814515] [2021-02-19 18:41:05,709 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 [2021-02-19 18:41:05,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:41:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:05,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:05,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:41:05,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061110140] [2021-02-19 18:41:05,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:41:05,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:41:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:41:05,841 INFO L87 Difference]: Start difference. First operand 49755 states and 184383 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:06,847 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-02-19 18:41:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:07,744 INFO L93 Difference]: Finished difference Result 110750 states and 395824 transitions. [2021-02-19 18:41:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:41:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:08,186 INFO L225 Difference]: With dead ends: 110750 [2021-02-19 18:41:08,186 INFO L226 Difference]: Without dead ends: 109916 [2021-02-19 18:41:08,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:41:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109916 states. [2021-02-19 18:41:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109916 to 72104. [2021-02-19 18:41:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72104 states, 72103 states have (on average 3.7628115335006864) internal successors, (271310), 72103 states have internal predecessors, (271310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72104 states to 72104 states and 271310 transitions. [2021-02-19 18:41:11,483 INFO L78 Accepts]: Start accepts. Automaton has 72104 states and 271310 transitions. Word has length 32 [2021-02-19 18:41:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 72104 states and 271310 transitions. [2021-02-19 18:41:11,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72104 states and 271310 transitions. [2021-02-19 18:41:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:11,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:11,596 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:11,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 18:41:11,797 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 655910165, now seen corresponding path program 53 times [2021-02-19 18:41:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:11,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636143715] [2021-02-19 18:41:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:11,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636143715] [2021-02-19 18:41:11,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275445057] [2021-02-19 18:41:11,845 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 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 [2021-02-19 18:41:11,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:41:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:41:11,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:11,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:41:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189591782] [2021-02-19 18:41:11,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:41:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:41:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:41:11,978 INFO L87 Difference]: Start difference. First operand 72104 states and 271310 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:13,171 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-02-19 18:41:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:14,775 INFO L93 Difference]: Finished difference Result 117439 states and 415020 transitions. [2021-02-19 18:41:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:41:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:15,582 INFO L225 Difference]: With dead ends: 117439 [2021-02-19 18:41:15,583 INFO L226 Difference]: Without dead ends: 117354 [2021-02-19 18:41:15,583 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:41:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117354 states. [2021-02-19 18:41:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117354 to 64655. [2021-02-19 18:41:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64655 states, 64654 states have (on average 3.720883472020293) internal successors, (240570), 64654 states have internal predecessors, (240570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64655 states to 64655 states and 240570 transitions. [2021-02-19 18:41:18,296 INFO L78 Accepts]: Start accepts. Automaton has 64655 states and 240570 transitions. Word has length 32 [2021-02-19 18:41:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:18,296 INFO L480 AbstractCegarLoop]: Abstraction has 64655 states and 240570 transitions. [2021-02-19 18:41:18,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 64655 states and 240570 transitions. [2021-02-19 18:41:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:18,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:18,397 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:18,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:18,598 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:18,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2059715797, now seen corresponding path program 54 times [2021-02-19 18:41:18,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:18,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979645361] [2021-02-19 18:41:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:41:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979645361] [2021-02-19 18:41:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465824964] [2021-02-19 18:41:18,644 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 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 [2021-02-19 18:41:18,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:41:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:41:18,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:18,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:41:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518156886] [2021-02-19 18:41:18,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:41:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:41:18,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:41:18,733 INFO L87 Difference]: Start difference. First operand 64655 states and 240570 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:19,843 INFO L93 Difference]: Finished difference Result 81752 states and 297778 transitions. [2021-02-19 18:41:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:41:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:20,224 INFO L225 Difference]: With dead ends: 81752 [2021-02-19 18:41:20,225 INFO L226 Difference]: Without dead ends: 81659 [2021-02-19 18:41:20,225 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:41:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81659 states. [2021-02-19 18:41:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81659 to 64327. [2021-02-19 18:41:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64327 states, 64326 states have (on average 3.721512296738488) internal successors, (239390), 64326 states have internal predecessors, (239390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64327 states to 64327 states and 239390 transitions. [2021-02-19 18:41:22,883 INFO L78 Accepts]: Start accepts. Automaton has 64327 states and 239390 transitions. Word has length 32 [2021-02-19 18:41:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:22,883 INFO L480 AbstractCegarLoop]: Abstraction has 64327 states and 239390 transitions. [2021-02-19 18:41:22,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 64327 states and 239390 transitions. [2021-02-19 18:41:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:22,990 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:22,990 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:23,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 18:41:23,190 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2064947631, now seen corresponding path program 55 times [2021-02-19 18:41:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:23,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671743787] [2021-02-19 18:41:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671743787] [2021-02-19 18:41:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948207329] [2021-02-19 18:41:23,250 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 [2021-02-19 18:41:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:23,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:23,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:41:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732435930] [2021-02-19 18:41:23,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:41:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:41:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:41:23,346 INFO L87 Difference]: Start difference. First operand 64327 states and 239390 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:24,542 INFO L93 Difference]: Finished difference Result 87990 states and 324754 transitions. [2021-02-19 18:41:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:41:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:24,949 INFO L225 Difference]: With dead ends: 87990 [2021-02-19 18:41:24,949 INFO L226 Difference]: Without dead ends: 87904 [2021-02-19 18:41:24,949 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:41:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87904 states. [2021-02-19 18:41:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87904 to 81353. [2021-02-19 18:41:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81353 states, 81352 states have (on average 3.751069426688957) internal successors, (305157), 81352 states have internal predecessors, (305157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81353 states to 81353 states and 305157 transitions. [2021-02-19 18:41:28,061 INFO L78 Accepts]: Start accepts. Automaton has 81353 states and 305157 transitions. Word has length 32 [2021-02-19 18:41:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:28,062 INFO L480 AbstractCegarLoop]: Abstraction has 81353 states and 305157 transitions. [2021-02-19 18:41:28,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 81353 states and 305157 transitions. [2021-02-19 18:41:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:28,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:28,198 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:28,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:28,399 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1814476847, now seen corresponding path program 56 times [2021-02-19 18:41:28,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972485309] [2021-02-19 18:41:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:28,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972485309] [2021-02-19 18:41:28,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104907594] [2021-02-19 18:41:28,442 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 [2021-02-19 18:41:28,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:41:28,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:28,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:28,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:41:28,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333395002] [2021-02-19 18:41:28,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:41:28,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:41:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:41:28,538 INFO L87 Difference]: Start difference. First operand 81353 states and 305157 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:29,926 INFO L93 Difference]: Finished difference Result 114475 states and 423363 transitions. [2021-02-19 18:41:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:41:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:30,450 INFO L225 Difference]: With dead ends: 114475 [2021-02-19 18:41:30,450 INFO L226 Difference]: Without dead ends: 114263 [2021-02-19 18:41:30,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:41:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114263 states. [2021-02-19 18:41:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114263 to 105184. [2021-02-19 18:41:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105184 states, 105183 states have (on average 3.763364802296949) internal successors, (395842), 105183 states have internal predecessors, (395842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105184 states to 105184 states and 395842 transitions. [2021-02-19 18:41:33,770 INFO L78 Accepts]: Start accepts. Automaton has 105184 states and 395842 transitions. Word has length 32 [2021-02-19 18:41:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:33,770 INFO L480 AbstractCegarLoop]: Abstraction has 105184 states and 395842 transitions. [2021-02-19 18:41:33,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 105184 states and 395842 transitions. [2021-02-19 18:41:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:41:33,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:33,943 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:34,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 18:41:34,143 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash 308608657, now seen corresponding path program 57 times [2021-02-19 18:41:34,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:34,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668460903] [2021-02-19 18:41:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:34,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668460903] [2021-02-19 18:41:34,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408084227] [2021-02-19 18:41:34,203 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 [2021-02-19 18:41:34,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:41:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:41:34,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:34,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-02-19 18:41:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143838024] [2021-02-19 18:41:34,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:41:34,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:41:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:41:34,298 INFO L87 Difference]: Start difference. First operand 105184 states and 395842 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:35,686 INFO L93 Difference]: Finished difference Result 114700 states and 425547 transitions. [2021-02-19 18:41:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:41:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:41:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:36,166 INFO L225 Difference]: With dead ends: 114700 [2021-02-19 18:41:36,166 INFO L226 Difference]: Without dead ends: 114682 [2021-02-19 18:41:36,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:41:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114682 states. [2021-02-19 18:41:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114682 to 105369. [2021-02-19 18:41:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105369 states, 105368 states have (on average 3.755941082681649) internal successors, (395756), 105368 states have internal predecessors, (395756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105369 states to 105369 states and 395756 transitions. [2021-02-19 18:41:40,226 INFO L78 Accepts]: Start accepts. Automaton has 105369 states and 395756 transitions. Word has length 32 [2021-02-19 18:41:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:40,226 INFO L480 AbstractCegarLoop]: Abstraction has 105369 states and 395756 transitions. [2021-02-19 18:41:40,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 105369 states and 395756 transitions. [2021-02-19 18:41:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:41:40,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:40,424 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:40,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:40,624 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1906069857, now seen corresponding path program 58 times [2021-02-19 18:41:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:40,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342788059] [2021-02-19 18:41:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:41:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342788059] [2021-02-19 18:41:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953772336] [2021-02-19 18:41:40,678 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 [2021-02-19 18:41:40,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:41:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:41:40,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:40,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:41:40,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486277296] [2021-02-19 18:41:40,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:41:40,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:41:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:41:40,779 INFO L87 Difference]: Start difference. First operand 105369 states and 395756 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-02-19 18:41:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:42,716 INFO L93 Difference]: Finished difference Result 162575 states and 611725 transitions. [2021-02-19 18:41:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:41:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 33 [2021-02-19 18:41:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:43,374 INFO L225 Difference]: With dead ends: 162575 [2021-02-19 18:41:43,375 INFO L226 Difference]: Without dead ends: 160873 [2021-02-19 18:41:43,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:41:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160873 states. [2021-02-19 18:41:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160873 to 155997. [2021-02-19 18:41:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155997 states, 155996 states have (on average 3.742910074617298) internal successors, (583879), 155996 states have internal predecessors, (583879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155997 states to 155997 states and 583879 transitions. [2021-02-19 18:41:48,696 INFO L78 Accepts]: Start accepts. Automaton has 155997 states and 583879 transitions. Word has length 33 [2021-02-19 18:41:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:48,696 INFO L480 AbstractCegarLoop]: Abstraction has 155997 states and 583879 transitions. [2021-02-19 18:41:48,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-02-19 18:41:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 155997 states and 583879 transitions. [2021-02-19 18:41:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:41:48,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:48,950 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:49,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:49,150 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1660061787, now seen corresponding path program 59 times [2021-02-19 18:41:49,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:49,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007852408] [2021-02-19 18:41:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:41:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007852408] [2021-02-19 18:41:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617408972] [2021-02-19 18:41:49,193 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 [2021-02-19 18:41:49,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:41:49,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:49,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:41:49,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:41:49,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:49,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-02-19 18:41:49,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286331530] [2021-02-19 18:41:49,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:41:49,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:41:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:41:49,360 INFO L87 Difference]: Start difference. First operand 155997 states and 583879 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:52,102 INFO L93 Difference]: Finished difference Result 126178 states and 465872 transitions. [2021-02-19 18:41:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:41:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:41:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:52,645 INFO L225 Difference]: With dead ends: 126178 [2021-02-19 18:41:52,645 INFO L226 Difference]: Without dead ends: 125415 [2021-02-19 18:41:52,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1021, Invalid=3269, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:41:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125415 states. [2021-02-19 18:41:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125415 to 98227. [2021-02-19 18:41:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98227 states, 98226 states have (on average 3.7583531855109644) internal successors, (369168), 98226 states have internal predecessors, (369168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98227 states to 98227 states and 369168 transitions. [2021-02-19 18:41:56,046 INFO L78 Accepts]: Start accepts. Automaton has 98227 states and 369168 transitions. Word has length 33 [2021-02-19 18:41:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:56,046 INFO L480 AbstractCegarLoop]: Abstraction has 98227 states and 369168 transitions. [2021-02-19 18:41:56,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 98227 states and 369168 transitions. [2021-02-19 18:41:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:41:56,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:56,774 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:56,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:56,975 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1635525747, now seen corresponding path program 60 times [2021-02-19 18:41:56,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:56,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355754371] [2021-02-19 18:41:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:41:57,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355754371] [2021-02-19 18:41:57,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642512955] [2021-02-19 18:41:57,015 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 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 [2021-02-19 18:41:57,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:41:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:41:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:41:57,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:57,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:41:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711910876] [2021-02-19 18:41:57,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:41:57,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:41:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:41:57,120 INFO L87 Difference]: Start difference. First operand 98227 states and 369168 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:58,099 INFO L93 Difference]: Finished difference Result 116975 states and 430813 transitions. [2021-02-19 18:41:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:41:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:41:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:58,601 INFO L225 Difference]: With dead ends: 116975 [2021-02-19 18:41:58,601 INFO L226 Difference]: Without dead ends: 116964 [2021-02-19 18:41:58,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:41:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116964 states. [2021-02-19 18:42:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116964 to 98029. [2021-02-19 18:42:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98029 states, 98028 states have (on average 3.7583547557840618) internal successors, (368424), 98028 states have internal predecessors, (368424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98029 states to 98029 states and 368424 transitions. [2021-02-19 18:42:02,094 INFO L78 Accepts]: Start accepts. Automaton has 98029 states and 368424 transitions. Word has length 34 [2021-02-19 18:42:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:02,094 INFO L480 AbstractCegarLoop]: Abstraction has 98029 states and 368424 transitions. [2021-02-19 18:42:02,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 98029 states and 368424 transitions. [2021-02-19 18:42:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:42:02,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:02,277 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:02,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 18:42:02,479 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash -752058671, now seen corresponding path program 61 times [2021-02-19 18:42:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:02,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381307010] [2021-02-19 18:42:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:02,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381307010] [2021-02-19 18:42:02,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142906236] [2021-02-19 18:42:02,526 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 [2021-02-19 18:42:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:02,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:02,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:02,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:42:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392654883] [2021-02-19 18:42:02,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:42:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:42:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:42:02,624 INFO L87 Difference]: Start difference. First operand 98029 states and 368424 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:04,059 INFO L93 Difference]: Finished difference Result 112958 states and 418562 transitions. [2021-02-19 18:42:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:42:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:42:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:04,553 INFO L225 Difference]: With dead ends: 112958 [2021-02-19 18:42:04,553 INFO L226 Difference]: Without dead ends: 112866 [2021-02-19 18:42:04,553 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112866 states. [2021-02-19 18:42:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112866 to 105925. [2021-02-19 18:42:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105925 states, 105924 states have (on average 3.7350364412220083) internal successors, (395630), 105924 states have internal predecessors, (395630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105925 states to 105925 states and 395630 transitions. [2021-02-19 18:42:07,899 INFO L78 Accepts]: Start accepts. Automaton has 105925 states and 395630 transitions. Word has length 35 [2021-02-19 18:42:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:07,899 INFO L480 AbstractCegarLoop]: Abstraction has 105925 states and 395630 transitions. [2021-02-19 18:42:07,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 105925 states and 395630 transitions. [2021-02-19 18:42:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:42:08,051 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:08,051 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:08,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:08,252 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2103487309, now seen corresponding path program 62 times [2021-02-19 18:42:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:08,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037625204] [2021-02-19 18:42:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037625204] [2021-02-19 18:42:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241383523] [2021-02-19 18:42:08,278 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 [2021-02-19 18:42:08,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:08,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:08,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:42:08,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:08,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:42:08,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188883434] [2021-02-19 18:42:08,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:42:08,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:08,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:42:08,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:42:08,370 INFO L87 Difference]: Start difference. First operand 105925 states and 395630 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:09,563 INFO L93 Difference]: Finished difference Result 109518 states and 406229 transitions. [2021-02-19 18:42:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:42:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:42:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:09,909 INFO L225 Difference]: With dead ends: 109518 [2021-02-19 18:42:09,909 INFO L226 Difference]: Without dead ends: 109403 [2021-02-19 18:42:09,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:42:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109403 states. [2021-02-19 18:42:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109403 to 104854. [2021-02-19 18:42:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104854 states, 104853 states have (on average 3.7321965036765756) internal successors, (391332), 104853 states have internal predecessors, (391332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104854 states to 104854 states and 391332 transitions. [2021-02-19 18:42:12,541 INFO L78 Accepts]: Start accepts. Automaton has 104854 states and 391332 transitions. Word has length 35 [2021-02-19 18:42:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:12,541 INFO L480 AbstractCegarLoop]: Abstraction has 104854 states and 391332 transitions. [2021-02-19 18:42:12,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 104854 states and 391332 transitions. [2021-02-19 18:42:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:42:12,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:12,663 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:12,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 18:42:12,863 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 405713717, now seen corresponding path program 63 times [2021-02-19 18:42:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:12,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541949743] [2021-02-19 18:42:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:12,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541949743] [2021-02-19 18:42:12,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003413584] [2021-02-19 18:42:12,894 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 [2021-02-19 18:42:12,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:42:12,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:13,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:13,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-02-19 18:42:13,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374832000] [2021-02-19 18:42:13,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:42:13,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:13,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:42:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:42:13,002 INFO L87 Difference]: Start difference. First operand 104854 states and 391332 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:15,185 INFO L93 Difference]: Finished difference Result 122632 states and 446831 transitions. [2021-02-19 18:42:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:42:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:42:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:15,553 INFO L225 Difference]: With dead ends: 122632 [2021-02-19 18:42:15,553 INFO L226 Difference]: Without dead ends: 121947 [2021-02-19 18:42:15,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1270, Invalid=5210, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:42:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121947 states. [2021-02-19 18:42:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121947 to 109419. [2021-02-19 18:42:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109419 states, 109418 states have (on average 3.72578551974995) internal successors, (407668), 109418 states have internal predecessors, (407668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109419 states to 109419 states and 407668 transitions. [2021-02-19 18:42:18,891 INFO L78 Accepts]: Start accepts. Automaton has 109419 states and 407668 transitions. Word has length 35 [2021-02-19 18:42:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:18,891 INFO L480 AbstractCegarLoop]: Abstraction has 109419 states and 407668 transitions. [2021-02-19 18:42:18,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 109419 states and 407668 transitions. [2021-02-19 18:42:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:42:19,035 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:19,036 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:19,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 18:42:19,250 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1342651759, now seen corresponding path program 64 times [2021-02-19 18:42:19,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:19,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825799860] [2021-02-19 18:42:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:19,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825799860] [2021-02-19 18:42:19,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169587609] [2021-02-19 18:42:19,289 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) [2021-02-19 18:42:19,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:42:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:19,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:19,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:42:19,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245403980] [2021-02-19 18:42:19,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:42:19,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:42:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:42:19,386 INFO L87 Difference]: Start difference. First operand 109419 states and 407668 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:20,575 INFO L93 Difference]: Finished difference Result 119643 states and 441774 transitions. [2021-02-19 18:42:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:42:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:42:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:20,988 INFO L225 Difference]: With dead ends: 119643 [2021-02-19 18:42:20,989 INFO L226 Difference]: Without dead ends: 119509 [2021-02-19 18:42:20,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:42:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119509 states. [2021-02-19 18:42:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119509 to 115545. [2021-02-19 18:42:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115545 states, 115544 states have (on average 3.711131690092086) internal successors, (428799), 115544 states have internal predecessors, (428799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115545 states to 115545 states and 428799 transitions. [2021-02-19 18:42:23,768 INFO L78 Accepts]: Start accepts. Automaton has 115545 states and 428799 transitions. Word has length 35 [2021-02-19 18:42:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:23,769 INFO L480 AbstractCegarLoop]: Abstraction has 115545 states and 428799 transitions. [2021-02-19 18:42:23,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 115545 states and 428799 transitions. [2021-02-19 18:42:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:42:23,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:23,898 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:24,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-02-19 18:42:24,099 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1986496073, now seen corresponding path program 65 times [2021-02-19 18:42:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:24,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538168476] [2021-02-19 18:42:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:24,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538168476] [2021-02-19 18:42:24,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819215498] [2021-02-19 18:42:24,124 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 [2021-02-19 18:42:24,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:42:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:42:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:42:24,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:24,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:42:24,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463246112] [2021-02-19 18:42:24,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:42:24,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:42:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:42:24,226 INFO L87 Difference]: Start difference. First operand 115545 states and 428799 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:26,394 INFO L93 Difference]: Finished difference Result 135877 states and 495198 transitions. [2021-02-19 18:42:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 18:42:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:42:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:26,838 INFO L225 Difference]: With dead ends: 135877 [2021-02-19 18:42:26,838 INFO L226 Difference]: Without dead ends: 135694 [2021-02-19 18:42:26,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:42:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135694 states. [2021-02-19 18:42:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135694 to 124589. [2021-02-19 18:42:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124589 states, 124588 states have (on average 3.720944232189296) internal successors, (463585), 124588 states have internal predecessors, (463585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124589 states to 124589 states and 463585 transitions. [2021-02-19 18:42:30,381 INFO L78 Accepts]: Start accepts. Automaton has 124589 states and 463585 transitions. Word has length 35 [2021-02-19 18:42:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:30,381 INFO L480 AbstractCegarLoop]: Abstraction has 124589 states and 463585 transitions. [2021-02-19 18:42:30,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 124589 states and 463585 transitions. [2021-02-19 18:42:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:42:30,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:30,637 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:30,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:30,839 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash -118167633, now seen corresponding path program 66 times [2021-02-19 18:42:30,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:30,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538559689] [2021-02-19 18:42:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:31,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538559689] [2021-02-19 18:42:31,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106959896] [2021-02-19 18:42:31,127 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 [2021-02-19 18:42:31,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:42:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:42:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:42:31,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:42:31,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:59 [2021-02-19 18:42:31,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:42:31,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:42:31,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:70 [2021-02-19 18:42:31,741 INFO L446 ElimStorePlain]: Different costs {3=[v_C_81], 7=[A, B]} [2021-02-19 18:42:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:31,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-02-19 18:42:31,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:31,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-02-19 18:42:31,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 18:42:31,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-02-19 18:42:31,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-02-19 18:42:31,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:31,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:31,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:42:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:31,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:31,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-02-19 18:42:31,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732409192] [2021-02-19 18:42:31,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:42:31,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:42:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:42:31,891 INFO L87 Difference]: Start difference. First operand 124589 states and 463585 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:34,433 INFO L93 Difference]: Finished difference Result 125452 states and 466154 transitions. [2021-02-19 18:42:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:42:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:42:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:34,853 INFO L225 Difference]: With dead ends: 125452 [2021-02-19 18:42:34,853 INFO L226 Difference]: Without dead ends: 125382 [2021-02-19 18:42:34,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:42:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125382 states. [2021-02-19 18:42:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125382 to 124705. [2021-02-19 18:42:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124705 states, 124704 states have (on average 3.7204179497049013) internal successors, (463951), 124704 states have internal predecessors, (463951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124705 states to 124705 states and 463951 transitions. [2021-02-19 18:42:37,681 INFO L78 Accepts]: Start accepts. Automaton has 124705 states and 463951 transitions. Word has length 37 [2021-02-19 18:42:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:37,681 INFO L480 AbstractCegarLoop]: Abstraction has 124705 states and 463951 transitions. [2021-02-19 18:42:37,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 124705 states and 463951 transitions. [2021-02-19 18:42:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:42:37,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:37,854 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:38,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 18:42:38,055 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1065058521, now seen corresponding path program 67 times [2021-02-19 18:42:38,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:38,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498656939] [2021-02-19 18:42:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498656939] [2021-02-19 18:42:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537127208] [2021-02-19 18:42:38,354 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 [2021-02-19 18:42:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:42:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:38,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:42:38,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:42:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:42:38,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:64 [2021-02-19 18:42:38,645 INFO L446 ElimStorePlain]: Different costs {3=[v_C_84], 12=[A, B]} [2021-02-19 18:42:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-02-19 18:42:38,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-02-19 18:42:38,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:38,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:38,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-02-19 18:42:38,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,694 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-02-19 18:42:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-02-19 18:42:38,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:38,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:38,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:42:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:39,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:39,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:42:39,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829762844] [2021-02-19 18:42:39,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:42:39,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:42:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:42:39,178 INFO L87 Difference]: Start difference. First operand 124705 states and 463951 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:40,586 INFO L93 Difference]: Finished difference Result 125400 states and 466064 transitions. [2021-02-19 18:42:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:42:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:42:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:40,986 INFO L225 Difference]: With dead ends: 125400 [2021-02-19 18:42:40,986 INFO L226 Difference]: Without dead ends: 125324 [2021-02-19 18:42:40,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:42:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125324 states. [2021-02-19 18:42:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125324 to 124689. [2021-02-19 18:42:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124689 states, 124688 states have (on average 3.7207509944822275) internal successors, (463933), 124688 states have internal predecessors, (463933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124689 states to 124689 states and 463933 transitions. [2021-02-19 18:42:43,849 INFO L78 Accepts]: Start accepts. Automaton has 124689 states and 463933 transitions. Word has length 37 [2021-02-19 18:42:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:43,849 INFO L480 AbstractCegarLoop]: Abstraction has 124689 states and 463933 transitions. [2021-02-19 18:42:43,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124689 states and 463933 transitions. [2021-02-19 18:42:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:42:44,543 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:44,543 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:44,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 18:42:44,744 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:44,744 INFO L82 PathProgramCache]: Analyzing trace with hash -839893649, now seen corresponding path program 68 times [2021-02-19 18:42:44,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:44,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774684047] [2021-02-19 18:42:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:45,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774684047] [2021-02-19 18:42:45,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467682558] [2021-02-19 18:42:45,011 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 [2021-02-19 18:42:45,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:42:45,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:45,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:42:45,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:45,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:42:45,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-02-19 18:42:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:45,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:42:45,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-02-19 18:42:45,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-02-19 18:42:45,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:42:45,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-02-19 18:42:45,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:22 [2021-02-19 18:42:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 18:42:45,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:45,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:45,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-02-19 18:42:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:45,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:45,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:42:45,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116621257] [2021-02-19 18:42:45,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:42:45,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:42:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:42:45,461 INFO L87 Difference]: Start difference. First operand 124689 states and 463933 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:46,748 INFO L93 Difference]: Finished difference Result 125438 states and 466245 transitions. [2021-02-19 18:42:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:42:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:42:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:47,607 INFO L225 Difference]: With dead ends: 125438 [2021-02-19 18:42:47,608 INFO L226 Difference]: Without dead ends: 125411 [2021-02-19 18:42:47,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:42:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125411 states. [2021-02-19 18:42:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125411 to 124783. [2021-02-19 18:42:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124783 states, 124782 states have (on average 3.720432434165184) internal successors, (464243), 124782 states have internal predecessors, (464243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124783 states to 124783 states and 464243 transitions. [2021-02-19 18:42:50,390 INFO L78 Accepts]: Start accepts. Automaton has 124783 states and 464243 transitions. Word has length 37 [2021-02-19 18:42:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:50,390 INFO L480 AbstractCegarLoop]: Abstraction has 124783 states and 464243 transitions. [2021-02-19 18:42:50,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 124783 states and 464243 transitions. [2021-02-19 18:42:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:42:50,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:50,635 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:42:50,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:42:50,836 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:42:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:42:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash 343332505, now seen corresponding path program 69 times [2021-02-19 18:42:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:42:50,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140073426] [2021-02-19 18:42:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:42:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:42:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:51,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140073426] [2021-02-19 18:42:51,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641236907] [2021-02-19 18:42:51,134 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 [2021-02-19 18:42:51,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:42:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:42:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:42:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:42:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:42:51,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-02-19 18:42:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:42:51,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-02-19 18:42:51,624 INFO L446 ElimStorePlain]: Different costs {2=[v_C_90], 3=[A, B]} [2021-02-19 18:42:51,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-02-19 18:42:51,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-02-19 18:42:51,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:42:51,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-02-19 18:42:51,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:42:51,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:42:51,691 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:78, output treesize:34 [2021-02-19 18:42:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:42:51,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:42:51,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-02-19 18:42:51,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:42:52,041 INFO L628 ElimStorePlain]: treesize reduction 98, result has 22.2 percent of original size [2021-02-19 18:42:52,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:42:52,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:38 [2021-02-19 18:42:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:42:52,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:42:52,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-02-19 18:42:52,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756392630] [2021-02-19 18:42:52,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:42:52,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:42:52,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:42:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:42:52,143 INFO L87 Difference]: Start difference. First operand 124783 states and 464243 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:42:55,998 INFO L93 Difference]: Finished difference Result 126683 states and 469812 transitions. [2021-02-19 18:42:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:42:55,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:42:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:42:56,416 INFO L225 Difference]: With dead ends: 126683 [2021-02-19 18:42:56,416 INFO L226 Difference]: Without dead ends: 126629 [2021-02-19 18:42:56,416 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:42:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126629 states. [2021-02-19 18:42:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126629 to 124879. [2021-02-19 18:42:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124879 states, 124878 states have (on average 3.720070789090152) internal successors, (464555), 124878 states have internal predecessors, (464555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124879 states to 124879 states and 464555 transitions. [2021-02-19 18:42:59,239 INFO L78 Accepts]: Start accepts. Automaton has 124879 states and 464555 transitions. Word has length 37 [2021-02-19 18:42:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:42:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 124879 states and 464555 transitions. [2021-02-19 18:42:59,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:42:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 124879 states and 464555 transitions. [2021-02-19 18:42:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:42:59,901 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:42:59,901 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:00,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:00,116 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1398671011, now seen corresponding path program 70 times [2021-02-19 18:43:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730883141] [2021-02-19 18:43:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:00,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730883141] [2021-02-19 18:43:00,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264131199] [2021-02-19 18:43:00,564 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 [2021-02-19 18:43:00,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:43:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:43:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:00,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:43:00,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:00,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:43:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:43:00,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:00,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-02-19 18:43:00,857 INFO L446 ElimStorePlain]: Different costs {3=[v_C_93], 12=[A, B]} [2021-02-19 18:43:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-02-19 18:43:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:00,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-02-19 18:43:00,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:00,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:00,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-02-19 18:43:00,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:00,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:00,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-02-19 18:43:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-02-19 18:43:01,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:01,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:01,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:01,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:11 [2021-02-19 18:43:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:01,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-02-19 18:43:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513581113] [2021-02-19 18:43:01,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:43:01,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:43:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:43:01,052 INFO L87 Difference]: Start difference. First operand 124879 states and 464555 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:03,385 INFO L93 Difference]: Finished difference Result 125472 states and 466345 transitions. [2021-02-19 18:43:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:43:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:43:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:03,779 INFO L225 Difference]: With dead ends: 125472 [2021-02-19 18:43:03,779 INFO L226 Difference]: Without dead ends: 125445 [2021-02-19 18:43:03,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:43:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125445 states. [2021-02-19 18:43:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125445 to 125013. [2021-02-19 18:43:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125013 states, 125012 states have (on average 3.7197149073688927) internal successors, (465009), 125012 states have internal predecessors, (465009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125013 states to 125013 states and 465009 transitions. [2021-02-19 18:43:06,704 INFO L78 Accepts]: Start accepts. Automaton has 125013 states and 465009 transitions. Word has length 37 [2021-02-19 18:43:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:06,704 INFO L480 AbstractCegarLoop]: Abstraction has 125013 states and 465009 transitions. [2021-02-19 18:43:06,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 125013 states and 465009 transitions. [2021-02-19 18:43:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:43:06,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:06,878 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:07,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:07,078 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 835873743, now seen corresponding path program 71 times [2021-02-19 18:43:07,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:07,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130405885] [2021-02-19 18:43:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130405885] [2021-02-19 18:43:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001648676] [2021-02-19 18:43:07,437 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 [2021-02-19 18:43:07,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:43:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:07,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:43:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:07,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:43:07,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:07,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-02-19 18:43:07,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-02-19 18:43:07,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:07,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:71 [2021-02-19 18:43:07,903 INFO L446 ElimStorePlain]: Different costs {6=[v_C_96], 12=[A, B]} [2021-02-19 18:43:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 66 [2021-02-19 18:43:07,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2021-02-19 18:43:07,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:07,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:07,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-02-19 18:43:07,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:07,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:07,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:43:07,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:98, output treesize:41 [2021-02-19 18:43:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-02-19 18:43:08,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:08,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:08,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:08,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:5 [2021-02-19 18:43:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:08,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:08,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:43:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348758700] [2021-02-19 18:43:08,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:43:08,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:43:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:43:08,099 INFO L87 Difference]: Start difference. First operand 125013 states and 465009 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:09,955 INFO L93 Difference]: Finished difference Result 125388 states and 466111 transitions. [2021-02-19 18:43:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:43:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:43:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:10,326 INFO L225 Difference]: With dead ends: 125388 [2021-02-19 18:43:10,327 INFO L226 Difference]: Without dead ends: 125301 [2021-02-19 18:43:10,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:43:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125301 states. [2021-02-19 18:43:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125301 to 125063. [2021-02-19 18:43:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125063 states, 125062 states have (on average 3.7194431561945276) internal successors, (465161), 125062 states have internal predecessors, (465161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125063 states to 125063 states and 465161 transitions. [2021-02-19 18:43:13,259 INFO L78 Accepts]: Start accepts. Automaton has 125063 states and 465161 transitions. Word has length 37 [2021-02-19 18:43:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:13,259 INFO L480 AbstractCegarLoop]: Abstraction has 125063 states and 465161 transitions. [2021-02-19 18:43:13,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 125063 states and 465161 transitions. [2021-02-19 18:43:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:43:13,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:13,436 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:13,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:13,636 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2019099897, now seen corresponding path program 72 times [2021-02-19 18:43:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:13,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500704377] [2021-02-19 18:43:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:14,204 WARN L202 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:43:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500704377] [2021-02-19 18:43:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011300361] [2021-02-19 18:43:14,535 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 [2021-02-19 18:43:14,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:43:14,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:43:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:43:14,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:14,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:14,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:14,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-02-19 18:43:14,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-02-19 18:43:14,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:14,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:14,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:43:14,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:92 [2021-02-19 18:43:14,980 INFO L446 ElimStorePlain]: Different costs {3=[v_C_99], 15=[A, B]} [2021-02-19 18:43:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-02-19 18:43:14,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:15,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:15,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 101 [2021-02-19 18:43:15,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:15,136 INFO L628 ElimStorePlain]: treesize reduction 122, result has 47.4 percent of original size [2021-02-19 18:43:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 87 treesize of output 113 [2021-02-19 18:43:15,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:15,282 INFO L628 ElimStorePlain]: treesize reduction 137, result has 36.0 percent of original size [2021-02-19 18:43:15,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:15,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:104, output treesize:110 [2021-02-19 18:43:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:15,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:15,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 18:43:15,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:15,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:15,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:15,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-02-19 18:43:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:15,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:15,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-02-19 18:43:15,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180666282] [2021-02-19 18:43:15,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:43:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:43:15,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:15,585 INFO L87 Difference]: Start difference. First operand 125063 states and 465161 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:18,287 INFO L93 Difference]: Finished difference Result 125585 states and 466639 transitions. [2021-02-19 18:43:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:43:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:43:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:18,670 INFO L225 Difference]: With dead ends: 125585 [2021-02-19 18:43:18,670 INFO L226 Difference]: Without dead ends: 125342 [2021-02-19 18:43:18,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:43:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125342 states. [2021-02-19 18:43:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125342 to 125037. [2021-02-19 18:43:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125037 states, 125036 states have (on average 3.7195927572859016) internal successors, (465083), 125036 states have internal predecessors, (465083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125037 states to 125037 states and 465083 transitions. [2021-02-19 18:43:21,542 INFO L78 Accepts]: Start accepts. Automaton has 125037 states and 465083 transitions. Word has length 37 [2021-02-19 18:43:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:21,542 INFO L480 AbstractCegarLoop]: Abstraction has 125037 states and 465083 transitions. [2021-02-19 18:43:21,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 125037 states and 465083 transitions. [2021-02-19 18:43:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:43:21,723 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:21,723 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:21,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 18:43:21,924 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash -215505, now seen corresponding path program 73 times [2021-02-19 18:43:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:21,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271457850] [2021-02-19 18:43:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:22,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271457850] [2021-02-19 18:43:22,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949504784] [2021-02-19 18:43:22,387 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 [2021-02-19 18:43:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:43:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:22,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:43:22,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-02-19 18:43:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:43:22,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:69 [2021-02-19 18:43:22,784 INFO L446 ElimStorePlain]: Different costs {3=[v_C_102], 12=[A, B]} [2021-02-19 18:43:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-02-19 18:43:22,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2021-02-19 18:43:22,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-02-19 18:43:22,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:88, output treesize:26 [2021-02-19 18:43:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:43:22,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:22,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:22,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-02-19 18:43:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:22,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:22,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:43:22,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665368026] [2021-02-19 18:43:22,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:43:22,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:43:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:43:22,931 INFO L87 Difference]: Start difference. First operand 125037 states and 465083 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:24,850 INFO L93 Difference]: Finished difference Result 125692 states and 467011 transitions. [2021-02-19 18:43:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:43:24,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:43:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:25,238 INFO L225 Difference]: With dead ends: 125692 [2021-02-19 18:43:25,238 INFO L226 Difference]: Without dead ends: 125518 [2021-02-19 18:43:25,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:43:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125518 states. [2021-02-19 18:43:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125518 to 125089. [2021-02-19 18:43:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125089 states, 125088 states have (on average 3.7193575722691223) internal successors, (465247), 125088 states have internal predecessors, (465247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125089 states to 125089 states and 465247 transitions. [2021-02-19 18:43:28,219 INFO L78 Accepts]: Start accepts. Automaton has 125089 states and 465247 transitions. Word has length 37 [2021-02-19 18:43:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:28,220 INFO L480 AbstractCegarLoop]: Abstraction has 125089 states and 465247 transitions. [2021-02-19 18:43:28,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 125089 states and 465247 transitions. [2021-02-19 18:43:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:43:28,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:28,417 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:28,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:28,630 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2145079109, now seen corresponding path program 74 times [2021-02-19 18:43:28,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:28,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720249962] [2021-02-19 18:43:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:29,579 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 18:43:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:29,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720249962] [2021-02-19 18:43:29,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229341925] [2021-02-19 18:43:29,791 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 [2021-02-19 18:43:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:43:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:43:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:29,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:43:29,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:29,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:29,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:29,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:43:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:43:30,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:30,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:61 [2021-02-19 18:43:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:30,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-02-19 18:43:30,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:30,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:94 [2021-02-19 18:43:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-02-19 18:43:30,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:30,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-02-19 18:43:30,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 18:43:30,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-02-19 18:43:30,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:30,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:30,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-02-19 18:43:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:30,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:30,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:43:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101621937] [2021-02-19 18:43:30,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:43:30,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:43:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:43:30,396 INFO L87 Difference]: Start difference. First operand 125089 states and 465247 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:43:34,753 INFO L93 Difference]: Finished difference Result 192388 states and 711342 transitions. [2021-02-19 18:43:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:43:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:43:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:43:35,389 INFO L225 Difference]: With dead ends: 192388 [2021-02-19 18:43:35,389 INFO L226 Difference]: Without dead ends: 192360 [2021-02-19 18:43:35,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:43:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192360 states. [2021-02-19 18:43:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192360 to 125158. [2021-02-19 18:43:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125158 states, 125157 states have (on average 3.719112794330321) internal successors, (465473), 125157 states have internal predecessors, (465473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125158 states to 125158 states and 465473 transitions. [2021-02-19 18:43:39,388 INFO L78 Accepts]: Start accepts. Automaton has 125158 states and 465473 transitions. Word has length 37 [2021-02-19 18:43:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:43:39,388 INFO L480 AbstractCegarLoop]: Abstraction has 125158 states and 465473 transitions. [2021-02-19 18:43:39,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 125158 states and 465473 transitions. [2021-02-19 18:43:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:43:39,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:43:39,649 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:43:39,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:43:39,849 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:43:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:43:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1031092895, now seen corresponding path program 75 times [2021-02-19 18:43:39,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:43:39,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183889941] [2021-02-19 18:43:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:43:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:43:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183889941] [2021-02-19 18:43:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671945195] [2021-02-19 18:43:40,432 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 [2021-02-19 18:43:40,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:43:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:43:40,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:43:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:43:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:43:40,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:40,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-02-19 18:43:40,711 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-02-19 18:43:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-02-19 18:43:40,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:40,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:43:40,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-02-19 18:43:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,113 INFO L354 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2021-02-19 18:43:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 56 [2021-02-19 18:43:41,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:41,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:41,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:43:41,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:88 [2021-02-19 18:43:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,477 INFO L354 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2021-02-19 18:43:41,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 106 [2021-02-19 18:43:41,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:41,723 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2021-02-19 18:43:41,724 INFO L628 ElimStorePlain]: treesize reduction 229, result has 47.2 percent of original size [2021-02-19 18:43:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:41,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:41,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 177 treesize of output 217 [2021-02-19 18:43:42,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 18:43:43,152 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 304 DAG size of output: 59 [2021-02-19 18:43:43,153 INFO L628 ElimStorePlain]: treesize reduction 3055, result has 4.0 percent of original size [2021-02-19 18:43:43,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:43:43,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:99, output treesize:269 [2021-02-19 18:43:44,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 70 [2021-02-19 18:43:44,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:43:44,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-02-19 18:43:44,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 56 [2021-02-19 18:43:44,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 18:43:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 56 [2021-02-19 18:43:44,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 18:43:44,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 70 [2021-02-19 18:43:44,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 18:43:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,567 INFO L354 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2021-02-19 18:43:44,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 1 [2021-02-19 18:43:44,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:44,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-02-19 18:43:44,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:44,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-02-19 18:43:44,709 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,818 INFO L354 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2021-02-19 18:43:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 1 [2021-02-19 18:43:44,819 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 15 [2021-02-19 18:43:44,859 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:44,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:44,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:44,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:43:44,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:43:44,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:44,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:44,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-02-19 18:43:44,952 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:45,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:45,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 85 [2021-02-19 18:43:45,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 4 xjuncts. [2021-02-19 18:43:45,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:45,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-02-19 18:43:45,238 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 3 xjuncts. [2021-02-19 18:43:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:45,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:43:45,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:43:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 15 [2021-02-19 18:43:45,281 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 18:43:46,568 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 449 DAG size of output: 80 [2021-02-19 18:43:46,568 INFO L628 ElimStorePlain]: treesize reduction 2750, result has 9.2 percent of original size [2021-02-19 18:43:46,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-02-19 18:43:46,618 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:672, output treesize:340 [2021-02-19 18:43:46,783 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2021-02-19 18:43:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:43:46,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:43:46,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-02-19 18:43:46,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788465062] [2021-02-19 18:43:46,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:43:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:43:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:43:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:43:46,876 INFO L87 Difference]: Start difference. First operand 125158 states and 465473 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:43:47,391 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 18:43:48,434 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 18:43:48,842 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 18:43:49,268 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-02-19 18:43:49,654 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:43:50,515 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 18:43:51,385 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 18:43:51,837 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2021-02-19 18:43:52,711 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 18:43:53,311 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 18:43:53,569 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 18:43:54,309 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 18:43:54,561 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-02-19 18:43:55,468 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 18:43:55,637 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-02-19 18:43:56,947 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-02-19 18:44:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:00,079 INFO L93 Difference]: Finished difference Result 276188 states and 999890 transitions. [2021-02-19 18:44:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-02-19 18:44:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:01,083 INFO L225 Difference]: With dead ends: 276188 [2021-02-19 18:44:01,084 INFO L226 Difference]: Without dead ends: 275993 [2021-02-19 18:44:01,084 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1441, Invalid=8065, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 18:44:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275993 states. [2021-02-19 18:44:05,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275993 to 125192. [2021-02-19 18:44:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125192 states, 125191 states have (on average 3.718853591711864) internal successors, (465567), 125191 states have internal predecessors, (465567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125192 states to 125192 states and 465567 transitions. [2021-02-19 18:44:05,644 INFO L78 Accepts]: Start accepts. Automaton has 125192 states and 465567 transitions. Word has length 37 [2021-02-19 18:44:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:05,644 INFO L480 AbstractCegarLoop]: Abstraction has 125192 states and 465567 transitions. [2021-02-19 18:44:05,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 125192 states and 465567 transitions. [2021-02-19 18:44:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:44:05,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:05,826 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:06,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-02-19 18:44:06,034 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1786021913, now seen corresponding path program 76 times [2021-02-19 18:44:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:06,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246888008] [2021-02-19 18:44:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246888008] [2021-02-19 18:44:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893548129] [2021-02-19 18:44:06,504 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 [2021-02-19 18:44:06,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:44:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:44:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:06,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:44:06,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:06,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:06,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:06,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:44:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:06,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-02-19 18:44:06,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:06,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:06,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:06,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:75 [2021-02-19 18:44:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-02-19 18:44:07,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:44:07,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-02-19 18:44:07,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:07,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,128 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:27 [2021-02-19 18:44:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-02-19 18:44:07,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:07,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:07,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:44:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:07,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:07,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:44:07,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452572632] [2021-02-19 18:44:07,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:44:07,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:44:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:44:07,233 INFO L87 Difference]: Start difference. First operand 125192 states and 465567 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:09,171 INFO L93 Difference]: Finished difference Result 125781 states and 467371 transitions. [2021-02-19 18:44:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:44:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:09,611 INFO L225 Difference]: With dead ends: 125781 [2021-02-19 18:44:09,611 INFO L226 Difference]: Without dead ends: 125694 [2021-02-19 18:44:09,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:44:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125694 states. [2021-02-19 18:44:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125694 to 125216. [2021-02-19 18:44:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125216 states, 125215 states have (on average 3.718731781336102) internal successors, (465641), 125215 states have internal predecessors, (465641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125216 states to 125216 states and 465641 transitions. [2021-02-19 18:44:12,648 INFO L78 Accepts]: Start accepts. Automaton has 125216 states and 465641 transitions. Word has length 37 [2021-02-19 18:44:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:12,648 INFO L480 AbstractCegarLoop]: Abstraction has 125216 states and 465641 transitions. [2021-02-19 18:44:12,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 125216 states and 465641 transitions. [2021-02-19 18:44:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:44:12,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:12,855 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:13,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-02-19 18:44:13,055 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash -788932391, now seen corresponding path program 77 times [2021-02-19 18:44:13,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:13,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009509626] [2021-02-19 18:44:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009509626] [2021-02-19 18:44:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570752418] [2021-02-19 18:44:13,581 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 [2021-02-19 18:44:13,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:44:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:44:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:13,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:44:13,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,296 WARN L202 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:44:14,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:14,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-02-19 18:44:14,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-02-19 18:44:14,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:14,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:68 [2021-02-19 18:44:14,766 INFO L446 ElimStorePlain]: Different costs {3=[v_C_114], 12=[A, B]} [2021-02-19 18:44:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-02-19 18:44:14,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-02-19 18:44:14,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-02-19 18:44:14,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:14,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:44:14,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-02-19 18:44:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:14,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-02-19 18:44:14,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:14,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:15,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:15,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:5 [2021-02-19 18:44:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:15,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:15,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:44:15,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102590501] [2021-02-19 18:44:15,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:15,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:15,050 INFO L87 Difference]: Start difference. First operand 125216 states and 465641 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:17,748 INFO L93 Difference]: Finished difference Result 125889 states and 467677 transitions. [2021-02-19 18:44:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:44:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:18,547 INFO L225 Difference]: With dead ends: 125889 [2021-02-19 18:44:18,547 INFO L226 Difference]: Without dead ends: 125748 [2021-02-19 18:44:18,547 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:44:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125748 states. [2021-02-19 18:44:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125748 to 125210. [2021-02-19 18:44:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125210 states, 125209 states have (on average 3.7187662228753524) internal successors, (465623), 125209 states have internal predecessors, (465623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125210 states to 125210 states and 465623 transitions. [2021-02-19 18:44:21,744 INFO L78 Accepts]: Start accepts. Automaton has 125210 states and 465623 transitions. Word has length 37 [2021-02-19 18:44:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:21,744 INFO L480 AbstractCegarLoop]: Abstraction has 125210 states and 465623 transitions. [2021-02-19 18:44:21,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 125210 states and 465623 transitions. [2021-02-19 18:44:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:44:21,971 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:21,971 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:22,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:22,171 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash 781098299, now seen corresponding path program 78 times [2021-02-19 18:44:22,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:22,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802947998] [2021-02-19 18:44:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802947998] [2021-02-19 18:44:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923156930] [2021-02-19 18:44:22,890 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 [2021-02-19 18:44:22,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:44:22,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:44:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:23,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:44:23,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:23,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-02-19 18:44:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-02-19 18:44:23,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:23,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-02-19 18:44:23,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-02-19 18:44:23,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:23,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:67 [2021-02-19 18:44:23,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-02-19 18:44:23,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:23,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:23,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:49 [2021-02-19 18:44:24,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:24,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-02-19 18:44:24,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:44:24,136 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-02-19 18:44:24,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:24,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-02-19 18:44:24,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-02-19 18:44:24,233 INFO L628 ElimStorePlain]: treesize reduction 39, result has 39.1 percent of original size [2021-02-19 18:44:24,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:24,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:37 [2021-02-19 18:44:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-02-19 18:44:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120998622] [2021-02-19 18:44:24,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:44:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:44:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:44:24,390 INFO L87 Difference]: Start difference. First operand 125210 states and 465623 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:25,940 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-02-19 18:44:26,160 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-02-19 18:44:28,390 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-02-19 18:44:28,592 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 18:44:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:30,445 INFO L93 Difference]: Finished difference Result 191148 states and 707173 transitions. [2021-02-19 18:44:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:44:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:31,520 INFO L225 Difference]: With dead ends: 191148 [2021-02-19 18:44:31,521 INFO L226 Difference]: Without dead ends: 191081 [2021-02-19 18:44:31,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=324, Invalid=2432, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:44:31,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191081 states. [2021-02-19 18:44:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191081 to 125260. [2021-02-19 18:44:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125260 states, 125259 states have (on average 3.7185990627419985) internal successors, (465788), 125259 states have internal predecessors, (465788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125260 states to 125260 states and 465788 transitions. [2021-02-19 18:44:35,061 INFO L78 Accepts]: Start accepts. Automaton has 125260 states and 465788 transitions. Word has length 37 [2021-02-19 18:44:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:35,061 INFO L480 AbstractCegarLoop]: Abstraction has 125260 states and 465788 transitions. [2021-02-19 18:44:35,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 125260 states and 465788 transitions. [2021-02-19 18:44:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:44:35,257 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:35,257 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:35,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:35,461 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash -337696993, now seen corresponding path program 79 times [2021-02-19 18:44:35,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:35,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422011576] [2021-02-19 18:44:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:35,894 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 18:44:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:36,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422011576] [2021-02-19 18:44:36,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262125892] [2021-02-19 18:44:36,480 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 [2021-02-19 18:44:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:44:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:36,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:44:36,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:36,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:44:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:36,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-02-19 18:44:36,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:36,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-02-19 18:44:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-02-19 18:44:36,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:36,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:36,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:73 [2021-02-19 18:44:37,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-02-19 18:44:37,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:37,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:37,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:37,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 18:44:37,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:37,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:37,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:37,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:26 [2021-02-19 18:44:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 18:44:37,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:37,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:37,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:37,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-02-19 18:44:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:37,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:37,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:44:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380943064] [2021-02-19 18:44:37,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:37,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:37,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:37,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:37,325 INFO L87 Difference]: Start difference. First operand 125260 states and 465788 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:39,058 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-02-19 18:44:39,339 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 18:44:39,506 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-02-19 18:44:39,963 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2021-02-19 18:44:40,282 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-02-19 18:44:40,802 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2021-02-19 18:44:41,482 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:44:42,329 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-02-19 18:44:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:44,294 INFO L93 Difference]: Finished difference Result 194167 states and 717139 transitions. [2021-02-19 18:44:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:44:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:45,006 INFO L225 Difference]: With dead ends: 194167 [2021-02-19 18:44:45,007 INFO L226 Difference]: Without dead ends: 193982 [2021-02-19 18:44:45,007 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:44:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193982 states. [2021-02-19 18:44:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193982 to 125397. [2021-02-19 18:44:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125397 states, 125396 states have (on average 3.7181329547991964) internal successors, (466239), 125396 states have internal predecessors, (466239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125397 states to 125397 states and 466239 transitions. [2021-02-19 18:44:48,676 INFO L78 Accepts]: Start accepts. Automaton has 125397 states and 466239 transitions. Word has length 37 [2021-02-19 18:44:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:44:48,676 INFO L480 AbstractCegarLoop]: Abstraction has 125397 states and 466239 transitions. [2021-02-19 18:44:48,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 125397 states and 466239 transitions. [2021-02-19 18:44:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:44:49,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:44:49,420 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:44:49,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:44:49,648 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:44:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:44:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2007558425, now seen corresponding path program 80 times [2021-02-19 18:44:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:44:49,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863185566] [2021-02-19 18:44:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:44:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:44:50,010 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 18:44:50,416 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:44:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863185566] [2021-02-19 18:44:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535755389] [2021-02-19 18:44:50,709 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 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 [2021-02-19 18:44:50,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:44:50,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:44:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:44:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:44:50,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:44:50,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:50,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:50,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:50,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-02-19 18:44:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 18:44:51,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:51,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:79 [2021-02-19 18:44:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-02-19 18:44:51,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:51,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:91 [2021-02-19 18:44:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:51,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:51,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-02-19 18:44:51,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:44:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:44:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-02-19 18:44:51,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:51,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,487 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:25 [2021-02-19 18:44:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-02-19 18:44:51,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:44:51,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:44:51,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:44:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:44:51,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:44:51,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:44:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225406027] [2021-02-19 18:44:51,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:44:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:44:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:44:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:44:51,715 INFO L87 Difference]: Start difference. First operand 125397 states and 466239 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:44:52,715 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-02-19 18:44:53,107 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-02-19 18:44:53,354 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-02-19 18:44:53,560 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-02-19 18:44:54,021 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 36 [2021-02-19 18:44:54,403 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-02-19 18:44:54,645 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-02-19 18:44:55,162 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2021-02-19 18:44:55,796 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:44:56,351 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-02-19 18:44:56,843 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-02-19 18:44:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:44:59,027 INFO L93 Difference]: Finished difference Result 192227 states and 710655 transitions. [2021-02-19 18:44:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:44:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:44:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:44:59,716 INFO L225 Difference]: With dead ends: 192227 [2021-02-19 18:44:59,717 INFO L226 Difference]: Without dead ends: 192021 [2021-02-19 18:44:59,717 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:45:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192021 states. [2021-02-19 18:45:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192021 to 125401. [2021-02-19 18:45:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125401 states, 125400 states have (on average 3.7179665071770334) internal successors, (466233), 125400 states have internal predecessors, (466233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125401 states to 125401 states and 466233 transitions. [2021-02-19 18:45:04,259 INFO L78 Accepts]: Start accepts. Automaton has 125401 states and 466233 transitions. Word has length 37 [2021-02-19 18:45:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:04,259 INFO L480 AbstractCegarLoop]: Abstraction has 125401 states and 466233 transitions. [2021-02-19 18:45:04,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 125401 states and 466233 transitions. [2021-02-19 18:45:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:45:04,488 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:04,488 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:04,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:04,689 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash -533702191, now seen corresponding path program 81 times [2021-02-19 18:45:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:04,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863820909] [2021-02-19 18:45:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:05,123 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:45:05,261 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:45:05,407 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 18:45:05,567 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:45:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:05,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863820909] [2021-02-19 18:45:05,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722501378] [2021-02-19 18:45:05,769 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 [2021-02-19 18:45:05,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:45:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:45:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:06,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:45:06,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:06,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-02-19 18:45:06,398 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-02-19 18:45:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-02-19 18:45:06,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:06,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:92 [2021-02-19 18:45:06,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:06,676 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-02-19 18:45:06,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 58 [2021-02-19 18:45:06,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:06,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:06,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:111 [2021-02-19 18:45:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:07,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:07,292 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:45:07,293 INFO L354 Elim1Store]: treesize reduction 24, result has 69.6 percent of original size [2021-02-19 18:45:07,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 76 treesize of output 112 [2021-02-19 18:45:07,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:45:07,511 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-02-19 18:45:07,511 INFO L628 ElimStorePlain]: treesize reduction 133, result has 61.0 percent of original size [2021-02-19 18:45:07,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:45:07,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:271 [2021-02-19 18:45:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:45:07,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,079 INFO L354 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2021-02-19 18:45:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 67 [2021-02-19 18:45:08,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:45:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:08,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:08,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-02-19 18:45:08,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:45:08,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:45:08,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-02-19 18:45:08,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,331 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 18:45:08,332 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.1 percent of original size [2021-02-19 18:45:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:45:08,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:08,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:08,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 54 [2021-02-19 18:45:08,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-02-19 18:45:08,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:45:08,479 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:45:08,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:08,608 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 18:45:08,609 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.1 percent of original size [2021-02-19 18:45:08,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:45:08,614 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:334, output treesize:36 [2021-02-19 18:45:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:08,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:08,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:45:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369385365] [2021-02-19 18:45:08,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:45:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:45:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:45:08,848 INFO L87 Difference]: Start difference. First operand 125401 states and 466233 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:09,539 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 18:45:10,881 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-02-19 18:45:11,499 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-02-19 18:45:11,708 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-02-19 18:45:12,613 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-02-19 18:45:12,904 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-02-19 18:45:13,164 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2021-02-19 18:45:13,537 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-02-19 18:45:13,879 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2021-02-19 18:45:14,277 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-02-19 18:45:14,457 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40 [2021-02-19 18:45:14,786 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-02-19 18:45:15,060 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-02-19 18:45:15,303 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 18:45:15,968 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-02-19 18:45:16,910 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2021-02-19 18:45:17,445 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-02-19 18:45:17,704 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 18:45:18,100 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-02-19 18:45:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:20,431 INFO L93 Difference]: Finished difference Result 228761 states and 844892 transitions. [2021-02-19 18:45:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:45:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:45:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:21,432 INFO L225 Difference]: With dead ends: 228761 [2021-02-19 18:45:21,432 INFO L226 Difference]: Without dead ends: 228687 [2021-02-19 18:45:21,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=636, Invalid=3396, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:45:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228687 states. [2021-02-19 18:45:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228687 to 125396. [2021-02-19 18:45:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125396 states, 125395 states have (on average 3.7180908329678215) internal successors, (466230), 125395 states have internal predecessors, (466230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125396 states to 125396 states and 466230 transitions. [2021-02-19 18:45:25,944 INFO L78 Accepts]: Start accepts. Automaton has 125396 states and 466230 transitions. Word has length 37 [2021-02-19 18:45:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:25,944 INFO L480 AbstractCegarLoop]: Abstraction has 125396 states and 466230 transitions. [2021-02-19 18:45:25,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 125396 states and 466230 transitions. [2021-02-19 18:45:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:45:26,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:26,147 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:26,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:45:26,347 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash -303875035, now seen corresponding path program 82 times [2021-02-19 18:45:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:26,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469837357] [2021-02-19 18:45:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:26,716 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-02-19 18:45:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:27,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469837357] [2021-02-19 18:45:27,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873263558] [2021-02-19 18:45:27,157 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 [2021-02-19 18:45:27,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:45:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:45:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:45:27,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:27,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:45:27,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-02-19 18:45:27,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:27,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:45:27,935 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_129]} [2021-02-19 18:45:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-02-19 18:45:27,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:27,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:27,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:45:27,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:28,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-02-19 18:45:28,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:28,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:28,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:28,033 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:73, output treesize:24 [2021-02-19 18:45:28,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 18:45:28,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:28,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:28,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:28,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-02-19 18:45:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:28,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:28,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:45:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048628883] [2021-02-19 18:45:28,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:45:28,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:45:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:45:28,213 INFO L87 Difference]: Start difference. First operand 125396 states and 466230 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:32,149 INFO L93 Difference]: Finished difference Result 125877 states and 467638 transitions. [2021-02-19 18:45:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:45:32,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:45:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:32,836 INFO L225 Difference]: With dead ends: 125877 [2021-02-19 18:45:32,837 INFO L226 Difference]: Without dead ends: 125792 [2021-02-19 18:45:32,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:45:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125792 states. [2021-02-19 18:45:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125792 to 125468. [2021-02-19 18:45:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125468 states, 125467 states have (on average 3.7177106330748324) internal successors, (466450), 125467 states have internal predecessors, (466450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125468 states to 125468 states and 466450 transitions. [2021-02-19 18:45:36,279 INFO L78 Accepts]: Start accepts. Automaton has 125468 states and 466450 transitions. Word has length 37 [2021-02-19 18:45:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:36,279 INFO L480 AbstractCegarLoop]: Abstraction has 125468 states and 466450 transitions. [2021-02-19 18:45:36,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 125468 states and 466450 transitions. [2021-02-19 18:45:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:45:36,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:36,475 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:36,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-02-19 18:45:36,676 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 879351119, now seen corresponding path program 83 times [2021-02-19 18:45:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:36,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45603428] [2021-02-19 18:45:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:37,076 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-02-19 18:45:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:37,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45603428] [2021-02-19 18:45:37,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215004796] [2021-02-19 18:45:37,536 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 [2021-02-19 18:45:37,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:45:37,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:45:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:37,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:45:37,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:37,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:37,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:37,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:45:38,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-02-19 18:45:38,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:38,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:73 [2021-02-19 18:45:38,373 INFO L446 ElimStorePlain]: Different costs {3=[v_C_132], 12=[A, B]} [2021-02-19 18:45:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-02-19 18:45:38,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:38,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-02-19 18:45:38,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:38,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:38,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-02-19 18:45:38,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:38,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,516 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-02-19 18:45:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-02-19 18:45:38,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:38,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:38,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:45:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:38,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:38,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 18:45:38,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39923938] [2021-02-19 18:45:38,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:45:38,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:45:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:45:38,783 INFO L87 Difference]: Start difference. First operand 125468 states and 466450 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:39,280 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-02-19 18:45:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:41,762 INFO L93 Difference]: Finished difference Result 125999 states and 468000 transitions. [2021-02-19 18:45:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:45:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:45:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:42,244 INFO L225 Difference]: With dead ends: 125999 [2021-02-19 18:45:42,244 INFO L226 Difference]: Without dead ends: 125848 [2021-02-19 18:45:42,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:45:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125848 states. [2021-02-19 18:45:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125848 to 125452. [2021-02-19 18:45:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125452 states, 125451 states have (on average 3.717770284812397) internal successors, (466398), 125451 states have internal predecessors, (466398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125452 states to 125452 states and 466398 transitions. [2021-02-19 18:45:45,316 INFO L78 Accepts]: Start accepts. Automaton has 125452 states and 466398 transitions. Word has length 37 [2021-02-19 18:45:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:45,316 INFO L480 AbstractCegarLoop]: Abstraction has 125452 states and 466398 transitions. [2021-02-19 18:45:45,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 125452 states and 466398 transitions. [2021-02-19 18:45:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:45:45,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:45,496 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:45,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 18:45:45,696 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash 946939919, now seen corresponding path program 84 times [2021-02-19 18:45:45,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:45,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396000991] [2021-02-19 18:45:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:46,105 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:45:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:46,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396000991] [2021-02-19 18:45:46,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395434453] [2021-02-19 18:45:46,512 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 [2021-02-19 18:45:46,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:45:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:45:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:45:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:46,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:45:46,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:46,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:46,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:46,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:45:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:46,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:45:47,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:47,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-02-19 18:45:47,580 INFO L446 ElimStorePlain]: Different costs {3=[v_C_135], 12=[A, B]} [2021-02-19 18:45:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-02-19 18:45:47,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:47,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:47,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:47,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-02-19 18:45:47,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:47,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 18:45:47,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:47,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:90, output treesize:29 [2021-02-19 18:45:47,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:45:47,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:47,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:47,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:12 [2021-02-19 18:45:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:48,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:48,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-02-19 18:45:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534132361] [2021-02-19 18:45:48,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:45:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:45:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:45:48,418 INFO L87 Difference]: Start difference. First operand 125452 states and 466398 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:49,053 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 18:45:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:45:51,762 INFO L93 Difference]: Finished difference Result 126290 states and 468841 transitions. [2021-02-19 18:45:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:45:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:45:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:45:52,198 INFO L225 Difference]: With dead ends: 126290 [2021-02-19 18:45:52,199 INFO L226 Difference]: Without dead ends: 126240 [2021-02-19 18:45:52,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:45:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126240 states. [2021-02-19 18:45:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126240 to 125550. [2021-02-19 18:45:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125550 states, 125549 states have (on average 3.7173533839377453) internal successors, (466710), 125549 states have internal predecessors, (466710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125550 states to 125550 states and 466710 transitions. [2021-02-19 18:45:55,148 INFO L78 Accepts]: Start accepts. Automaton has 125550 states and 466710 transitions. Word has length 37 [2021-02-19 18:45:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:45:55,148 INFO L480 AbstractCegarLoop]: Abstraction has 125550 states and 466710 transitions. [2021-02-19 18:45:55,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 125550 states and 466710 transitions. [2021-02-19 18:45:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:45:55,874 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:45:55,874 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:45:56,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-02-19 18:45:56,087 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:45:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:45:56,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2130166073, now seen corresponding path program 85 times [2021-02-19 18:45:56,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:45:56,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345595478] [2021-02-19 18:45:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:45:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:56,462 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:45:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345595478] [2021-02-19 18:45:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384590170] [2021-02-19 18:45:56,850 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 [2021-02-19 18:45:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:45:56,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:45:56,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:45:57,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:45:57,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:45:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:45:57,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-02-19 18:45:57,503 INFO L446 ElimStorePlain]: Different costs {3=[v_C_138], 12=[A, B]} [2021-02-19 18:45:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-02-19 18:45:57,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:57,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-02-19 18:45:57,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:45:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:45:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-02-19 18:45:57,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,642 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:29 [2021-02-19 18:45:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-02-19 18:45:57,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:45:57,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:45:57,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-02-19 18:45:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:45:57,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:45:57,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 18:45:57,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336332205] [2021-02-19 18:45:57,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:45:57,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:45:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:45:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:45:57,924 INFO L87 Difference]: Start difference. First operand 125550 states and 466710 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:45:58,554 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 18:46:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:01,585 INFO L93 Difference]: Finished difference Result 126145 states and 468466 transitions. [2021-02-19 18:46:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:46:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:46:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:02,047 INFO L225 Difference]: With dead ends: 126145 [2021-02-19 18:46:02,047 INFO L226 Difference]: Without dead ends: 126120 [2021-02-19 18:46:02,048 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:46:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126120 states. [2021-02-19 18:46:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126120 to 125562. [2021-02-19 18:46:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125562 states, 125561 states have (on average 3.7174441108305922) internal successors, (466766), 125561 states have internal predecessors, (466766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125562 states to 125562 states and 466766 transitions. [2021-02-19 18:46:05,055 INFO L78 Accepts]: Start accepts. Automaton has 125562 states and 466766 transitions. Word has length 37 [2021-02-19 18:46:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:05,055 INFO L480 AbstractCegarLoop]: Abstraction has 125562 states and 466766 transitions. [2021-02-19 18:46:05,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 125562 states and 466766 transitions. [2021-02-19 18:46:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:46:05,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:05,260 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:05,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-02-19 18:46:05,473 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 388162557, now seen corresponding path program 86 times [2021-02-19 18:46:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:05,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671092037] [2021-02-19 18:46:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671092037] [2021-02-19 18:46:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991784898] [2021-02-19 18:46:06,110 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 [2021-02-19 18:46:06,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:46:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:46:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:06,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:46:06,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:06,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-02-19 18:46:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:46:06,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:06,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:79 [2021-02-19 18:46:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2021-02-19 18:46:06,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2021-02-19 18:46:06,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2021-02-19 18:46:06,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:06,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:07,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:07,000 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:92, output treesize:33 [2021-02-19 18:46:07,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:07,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-02-19 18:46:07,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:46:07,473 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-02-19 18:46:07,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:07,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-02-19 18:46:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:07,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:07,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:46:07,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728767047] [2021-02-19 18:46:07,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:46:07,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:46:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:46:07,650 INFO L87 Difference]: Start difference. First operand 125562 states and 466766 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:08,764 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 18:46:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:13,137 INFO L93 Difference]: Finished difference Result 127690 states and 473212 transitions. [2021-02-19 18:46:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:46:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:46:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:13,586 INFO L225 Difference]: With dead ends: 127690 [2021-02-19 18:46:13,586 INFO L226 Difference]: Without dead ends: 127640 [2021-02-19 18:46:13,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:46:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127640 states. [2021-02-19 18:46:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127640 to 125595. [2021-02-19 18:46:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125595 states, 125594 states have (on average 3.7174387311495773) internal successors, (466888), 125594 states have internal predecessors, (466888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125595 states to 125595 states and 466888 transitions. [2021-02-19 18:46:16,635 INFO L78 Accepts]: Start accepts. Automaton has 125595 states and 466888 transitions. Word has length 37 [2021-02-19 18:46:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:16,635 INFO L480 AbstractCegarLoop]: Abstraction has 125595 states and 466888 transitions. [2021-02-19 18:46:16,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 125595 states and 466888 transitions. [2021-02-19 18:46:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:46:16,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:16,843 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:17,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:46:17,058 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1747506193, now seen corresponding path program 87 times [2021-02-19 18:46:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:17,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617548054] [2021-02-19 18:46:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:17,510 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 18:46:18,301 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-02-19 18:46:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617548054] [2021-02-19 18:46:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921446094] [2021-02-19 18:46:18,572 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 [2021-02-19 18:46:18,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:46:18,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:18,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-02-19 18:46:18,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:18,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:46:18,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:18,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:18,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:18,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-02-19 18:46:19,104 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-02-19 18:46:19,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:46:19,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:19,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:19,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:19,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-02-19 18:46:19,952 INFO L446 ElimStorePlain]: Different costs {6=[v_C_144], 7=[A, B]} [2021-02-19 18:46:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:20,066 INFO L354 Elim1Store]: treesize reduction 62, result has 23.5 percent of original size [2021-02-19 18:46:20,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2021-02-19 18:46:20,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:20,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:20,288 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-02-19 18:46:20,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-02-19 18:46:20,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:46:20,457 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 18:46:20,458 INFO L628 ElimStorePlain]: treesize reduction 31, result has 72.3 percent of original size [2021-02-19 18:46:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:20,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:20,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-02-19 18:46:20,596 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:46:20,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:20,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:46:20,679 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:96, output treesize:59 [2021-02-19 18:46:21,144 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 18:46:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:21,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:21,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:46:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-02-19 18:46:21,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:21,502 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-02-19 18:46:21,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:21,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-02-19 18:46:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:21,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:21,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-02-19 18:46:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004044602] [2021-02-19 18:46:21,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:46:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:46:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:46:21,715 INFO L87 Difference]: Start difference. First operand 125595 states and 466888 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:22,949 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-02-19 18:46:23,696 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:46:27,914 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:46:28,466 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-02-19 18:46:28,913 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-02-19 18:46:30,500 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 18:46:31,596 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:46:31,986 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 18:46:32,463 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 18:46:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:33,225 INFO L93 Difference]: Finished difference Result 126789 states and 470363 transitions. [2021-02-19 18:46:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:46:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:46:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:33,692 INFO L225 Difference]: With dead ends: 126789 [2021-02-19 18:46:33,692 INFO L226 Difference]: Without dead ends: 126472 [2021-02-19 18:46:33,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:46:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126472 states. [2021-02-19 18:46:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126472 to 125690. [2021-02-19 18:46:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125690 states, 125689 states have (on average 3.717055589590179) internal successors, (467193), 125689 states have internal predecessors, (467193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125690 states to 125690 states and 467193 transitions. [2021-02-19 18:46:36,761 INFO L78 Accepts]: Start accepts. Automaton has 125690 states and 467193 transitions. Word has length 37 [2021-02-19 18:46:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:36,761 INFO L480 AbstractCegarLoop]: Abstraction has 125690 states and 467193 transitions. [2021-02-19 18:46:36,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 125690 states and 467193 transitions. [2021-02-19 18:46:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:46:36,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:36,966 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:37,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:46:37,166 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 402597499, now seen corresponding path program 88 times [2021-02-19 18:46:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863937877] [2021-02-19 18:46:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:37,688 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-02-19 18:46:37,906 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 18:46:38,632 WARN L202 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 18:46:38,860 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 18:46:39,023 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 18:46:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863937877] [2021-02-19 18:46:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504777269] [2021-02-19 18:46:39,273 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 [2021-02-19 18:46:39,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:46:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:46:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:46:39,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:39,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:39,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:39,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-02-19 18:46:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:39,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-02-19 18:46:39,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:39,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:39,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:39,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-02-19 18:46:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:40,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-02-19 18:46:40,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:40,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:98 [2021-02-19 18:46:40,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-02-19 18:46:40,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:40,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:47 [2021-02-19 18:46:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 18:46:40,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-02-19 18:46:40,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:40,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:40,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-02-19 18:46:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:40,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:46:40,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:46:40,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008424297] [2021-02-19 18:46:40,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:46:40,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:46:40,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:46:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:46:40,885 INFO L87 Difference]: Start difference. First operand 125690 states and 467193 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:41,289 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 18:46:42,171 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-02-19 18:46:42,996 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 18:46:43,553 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 18:46:43,928 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-02-19 18:46:44,210 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:46:44,433 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-02-19 18:46:44,923 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-02-19 18:46:45,238 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-02-19 18:46:45,515 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-02-19 18:46:47,239 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-02-19 18:46:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:46:51,160 INFO L93 Difference]: Finished difference Result 193916 states and 716278 transitions. [2021-02-19 18:46:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:46:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:46:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:46:51,896 INFO L225 Difference]: With dead ends: 193916 [2021-02-19 18:46:51,896 INFO L226 Difference]: Without dead ends: 193853 [2021-02-19 18:46:51,896 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:46:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193853 states. [2021-02-19 18:46:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193853 to 126386. [2021-02-19 18:46:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126386 states, 126385 states have (on average 3.7173477865252997) internal successors, (469817), 126385 states have internal predecessors, (469817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126386 states to 126386 states and 469817 transitions. [2021-02-19 18:46:56,213 INFO L78 Accepts]: Start accepts. Automaton has 126386 states and 469817 transitions. Word has length 37 [2021-02-19 18:46:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:46:56,214 INFO L480 AbstractCegarLoop]: Abstraction has 126386 states and 469817 transitions. [2021-02-19 18:46:56,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:46:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 126386 states and 469817 transitions. [2021-02-19 18:46:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:46:56,500 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:46:56,500 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:46:56,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-02-19 18:46:56,701 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:46:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:46:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash -716197793, now seen corresponding path program 89 times [2021-02-19 18:46:56,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:46:56,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596676983] [2021-02-19 18:46:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:46:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:46:56,962 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 18:46:57,120 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:46:57,367 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:46:57,566 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 18:46:57,810 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 18:46:58,026 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 18:46:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:46:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596676983] [2021-02-19 18:46:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50914903] [2021-02-19 18:46:58,343 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 [2021-02-19 18:46:58,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:46:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:46:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:46:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:46:58,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:46:58,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:58,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:58,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:46:58,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-02-19 18:46:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:46:59,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 18:46:59,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:46:59,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:46:59,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:46:59,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:78 [2021-02-19 18:46:59,855 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 18:47:00,307 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 18:47:00,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,397 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 18:47:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-02-19 18:47:00,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:00,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:00,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:47:00,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:84 [2021-02-19 18:47:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:00,922 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:47:00,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 92 [2021-02-19 18:47:00,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:47:01,161 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 18:47:01,163 INFO L628 ElimStorePlain]: treesize reduction 110, result has 37.9 percent of original size [2021-02-19 18:47:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:01,366 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:47:01,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 84 [2021-02-19 18:47:01,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 5 xjuncts. [2021-02-19 18:47:01,722 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2021-02-19 18:47:01,723 INFO L628 ElimStorePlain]: treesize reduction 144, result has 23.8 percent of original size [2021-02-19 18:47:01,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:47:01,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:45 [2021-02-19 18:47:02,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-02-19 18:47:02,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:02,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:02,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:47:02,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:02,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:47:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-02-19 18:47:02,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:02,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:02,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:47:02,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:20 [2021-02-19 18:47:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:02,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:02,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-02-19 18:47:02,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418675406] [2021-02-19 18:47:02,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:47:02,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:02,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:47:02,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:47:02,630 INFO L87 Difference]: Start difference. First operand 126386 states and 469817 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:03,433 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 18:47:03,820 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 18:47:04,167 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 18:47:04,882 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-02-19 18:47:05,294 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 18:47:06,068 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:47:06,373 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-19 18:47:07,192 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 18:47:07,570 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-02-19 18:47:08,401 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:47:08,843 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-02-19 18:47:11,229 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-02-19 18:47:11,576 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-02-19 18:47:13,070 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 Received shutdown request... [2021-02-19 18:47:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:47:13,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-02-19 18:47:13,353 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:47:13,357 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:47:13,358 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:47:13 BasicIcfg [2021-02-19 18:47:13,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:47:13,358 INFO L168 Benchmark]: Toolchain (without parser) took 484890.38 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. [2021-02-19 18:47:13,361 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.5 MB in the beginning and 237.3 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:47:13,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:47:13,361 INFO L168 Benchmark]: Boogie Preprocessor took 24.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:47:13,361 INFO L168 Benchmark]: RCFGBuilder took 313.24 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 237.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-02-19 18:47:13,362 INFO L168 Benchmark]: TraceAbstraction took 484515.36 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 237.0 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. [2021-02-19 18:47:13,363 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.5 MB in the beginning and 237.3 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 313.24 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 237.7 MB in the end (delta: -4.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 484515.36 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 237.0 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 70). Cancelled while BasicCegarLoop was constructing difference of abstraction (126386states) and FLOYD_HOARE automaton (currently 38 states, 29 states before enhancement),while ReachableStatesComputation was computing reachable states (5578 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 484.4s, OverallIterations: 97, TraceHistogramMax: 3, AutomataDifference: 228.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4116 SDtfs, 19518 SDslu, 33107 SDs, 0 SdLazy, 75141 SolverSat, 3731 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5145 GetRequests, 2329 SyntacticMatches, 109 SemanticMatches, 2707 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34259 ImplicationChecksByTransitivity, 120.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155997occurred in iteration=66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 139.0s AutomataMinimizationTime, 96 MinimizatonAttempts, 1062487 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 83.4s InterpolantComputationTime, 5842 NumberOfCodeBlocks, 5833 NumberOfCodeBlocksAsserted, 355 NumberOfCheckSat, 5654 ConstructedInterpolants, 92 QuantifiedInterpolants, 4159125 SizeOfPredicates, 488 NumberOfNonLiveVariables, 8271 ConjunctsInSsa, 2566 ConjunctsInUnsatCore, 188 InterpolantComputations, 6 PerfectInterpolantSequences, 532/3219 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