/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 17:10:12,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:10:12,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:10:12,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 17:10:12,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 17:10:12,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 17:10:12,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 17:10:12,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 17:10:12,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 17:10:12,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 17:10:12,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 17:10:12,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 17:10:12,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 17:10:12,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 17:10:12,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 17:10:12,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 17:10:12,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 17:10:12,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 17:10:12,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 17:10:12,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 17:10:12,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 17:10:12,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 17:10:12,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 17:10:12,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 17:10:12,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 17:10:12,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 17:10:12,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 17:10:12,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 17:10:12,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 17:10:12,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 17:10:12,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 17:10:12,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 17:10:12,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 17:10:12,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 17:10:12,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 17:10:12,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 17:10:12,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 17:10:12,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 17:10:12,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:10:12,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:10:12,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:10:12,952 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-Separate.epf [2021-06-05 17:10:12,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:10:12,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:10:12,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:10:12,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:10:12,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:10:12,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:10:12,978 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:10:12,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:10:12,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:10:12,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:10:12,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:10:12,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:10:12,981 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:10:12,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:10:12,982 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 17:10:12,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:10:13,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:10:13,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:10:13,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:10:13,314 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 17:10:13,315 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 17:10:13,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-06-05 17:10:13,316 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-06-05 17:10:13,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:10:13,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 17:10:13,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:10:13,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:10:13,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:10:13,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:10:13,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:10:13,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:10:13,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:10:13,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/1) ... [2021-06-05 17:10:13,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:10:13,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:10:13,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:10:13,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:10:13,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (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 [2021-06-05 17:10:13,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 17:10:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 17:10:13,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 17:10:13,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 17:10:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 17:10:13,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 17:10:13,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 17:10:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:10:13,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:10:13,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 17:10:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 17:10:13,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 17:10:13,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 17:10:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 17:10:13,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 17:10:13,493 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:10:13,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:10:13,681 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 17:10:13,683 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:10:13 BoogieIcfgContainer [2021-06-05 17:10:13,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:10:13,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:10:13,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:10:13,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:10:13,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:10:13" (1/2) ... [2021-06-05 17:10:13,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daa0f78 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:10:13, skipping insertion in model container [2021-06-05 17:10:13,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:10:13" (2/2) ... [2021-06-05 17:10:13,689 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-06-05 17:10:13,694 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:10:13,694 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:10:13,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:10:13,695 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:10:13,733 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 17:10:13,758 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 17:10:13,774 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:10:13,774 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:10:13,774 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:10:13,775 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:10:13,775 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:10:13,775 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:10:13,775 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:10:13,775 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 17:10:13,783 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-06-05 17:10:13,884 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:10:13,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:13,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:13,916 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -39669396, now seen corresponding path program 1 times [2021-06-05 17:10:13,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193296475] [2021-06-05 17:10:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:14,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193296475] [2021-06-05 17:10:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193296475] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:14,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:14,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 17:10:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644849120] [2021-06-05 17:10:14,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 17:10:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 17:10:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:10:14,126 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 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) [2021-06-05 17:10:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:14,196 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-06-05 17:10:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 17:10:14,198 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 [2021-06-05 17:10:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:14,225 INFO L225 Difference]: With dead ends: 854 [2021-06-05 17:10:14,225 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 17:10:14,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:10:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 17:10:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-06-05 17:10:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-06-05 17:10:14,340 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-06-05 17:10:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:14,341 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-06-05 17:10:14,341 INFO L483 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) [2021-06-05 17:10:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-06-05 17:10:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:14,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:14,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:14,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:10:14,347 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:14,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-06-05 17:10:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:14,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142726199] [2021-06-05 17:10:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142726199] [2021-06-05 17:10:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142726199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584468442] [2021-06-05 17:10:14,446 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 [2021-06-05 17:10:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 17:10:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584468442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:14,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:14,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 17:10:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988789758] [2021-06-05 17:10:14,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:14,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:14,629 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:14,769 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-06-05 17:10:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:10:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:14,780 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 17:10:14,780 INFO L226 Difference]: Without dead ends: 1573 [2021-06-05 17:10:14,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:10:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-05 17:10:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-06-05 17:10:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-06-05 17:10:14,832 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-06-05 17:10:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:14,832 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-06-05 17:10:14,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-06-05 17:10:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:14,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:14,836 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:15,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 17:10:15,059 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1597271150, now seen corresponding path program 1 times [2021-06-05 17:10:15,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:15,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885613292] [2021-06-05 17:10:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:15,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885613292] [2021-06-05 17:10:15,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885613292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590756894] [2021-06-05 17:10:15,129 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 [2021-06-05 17:10:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 17:10:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590756894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:15,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:15,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 17:10:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590418289] [2021-06-05 17:10:15,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:15,234 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:15,324 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-06-05 17:10:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:15,335 INFO L225 Difference]: With dead ends: 1748 [2021-06-05 17:10:15,336 INFO L226 Difference]: Without dead ends: 1748 [2021-06-05 17:10:15,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:10:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-05 17:10:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-06-05 17:10:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-06-05 17:10:15,378 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-06-05 17:10:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:15,378 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-06-05 17:10:15,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-06-05 17:10:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:15,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:15,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:15,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:15,597 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1296417938, now seen corresponding path program 1 times [2021-06-05 17:10:15,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:15,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444919997] [2021-06-05 17:10:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:15,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444919997] [2021-06-05 17:10:15,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444919997] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:15,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:15,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:10:15,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83310842] [2021-06-05 17:10:15,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:10:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:10:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:15,646 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:15,703 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-06-05 17:10:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:10:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:15,711 INFO L225 Difference]: With dead ends: 997 [2021-06-05 17:10:15,711 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 17:10:15,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 17:10:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-06-05 17:10:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-06-05 17:10:15,740 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-06-05 17:10:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:15,740 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-06-05 17:10:15,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-06-05 17:10:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:10:15,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:15,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:15,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:10:15,745 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash -845683858, now seen corresponding path program 2 times [2021-06-05 17:10:15,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:15,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851593116] [2021-06-05 17:10:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:15,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851593116] [2021-06-05 17:10:15,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851593116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:15,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:15,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:10:15,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637001690] [2021-06-05 17:10:15,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:10:15,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:10:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:15,801 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:15,851 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-06-05 17:10:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:10:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:15,857 INFO L225 Difference]: With dead ends: 949 [2021-06-05 17:10:15,857 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 17:10:15,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 17:10:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-06-05 17:10:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-06-05 17:10:15,883 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-06-05 17:10:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:15,883 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-06-05 17:10:15,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-06-05 17:10:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:15,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:15,886 INFO L521 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] [2021-06-05 17:10:15,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 17:10:15,886 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-06-05 17:10:15,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:15,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036566690] [2021-06-05 17:10:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036566690] [2021-06-05 17:10:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036566690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029128121] [2021-06-05 17:10:15,952 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 [2021-06-05 17:10:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:16,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029128121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:16,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:16,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 17:10:16,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006784440] [2021-06-05 17:10:16,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:10:16,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:10:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:10:16,044 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 17:10:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:16,173 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-06-05 17:10:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:10:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 [2021-06-05 17:10:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:16,182 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 17:10:16,182 INFO L226 Difference]: Without dead ends: 1389 [2021-06-05 17:10:16,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-06-05 17:10:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-06-05 17:10:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-06-05 17:10:16,221 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-06-05 17:10:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:16,221 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-06-05 17:10:16,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-05 17:10:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-06-05 17:10:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:16,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:16,225 INFO L521 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] [2021-06-05 17:10:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:16,445 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-06-05 17:10:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943891580] [2021-06-05 17:10:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:16,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:16,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943891580] [2021-06-05 17:10:16,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943891580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:16,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977942029] [2021-06-05 17:10:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 17:10:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977942029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:16,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:16,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616876834] [2021-06-05 17:10:16,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:16,675 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:16,734 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-06-05 17:10:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:16,744 INFO L225 Difference]: With dead ends: 1781 [2021-06-05 17:10:16,745 INFO L226 Difference]: Without dead ends: 1738 [2021-06-05 17:10:16,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-05 17:10:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-06-05 17:10:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-06-05 17:10:16,783 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-06-05 17:10:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:16,783 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-06-05 17:10:16,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-06-05 17:10:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:16,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:16,787 INFO L521 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] [2021-06-05 17:10:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:17,001 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-06-05 17:10:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:17,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553047594] [2021-06-05 17:10:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:17,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553047594] [2021-06-05 17:10:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553047594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226239482] [2021-06-05 17:10:17,084 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 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 [2021-06-05 17:10:17,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:17,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226239482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:17,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:17,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459793943] [2021-06-05 17:10:17,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:17,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:17,211 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:17,279 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-06-05 17:10:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:17,289 INFO L225 Difference]: With dead ends: 1504 [2021-06-05 17:10:17,289 INFO L226 Difference]: Without dead ends: 1461 [2021-06-05 17:10:17,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-05 17:10:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-06-05 17:10:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-06-05 17:10:17,327 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-06-05 17:10:17,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:17,327 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-06-05 17:10:17,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-06-05 17:10:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:17,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:17,332 INFO L521 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] [2021-06-05 17:10:17,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:17,555 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-06-05 17:10:17,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:17,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932729099] [2021-06-05 17:10:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:17,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932729099] [2021-06-05 17:10:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932729099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106726466] [2021-06-05 17:10:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:17,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:17,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106726466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:17,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:17,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508326400] [2021-06-05 17:10:17,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:17,726 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:17,794 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-06-05 17:10:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:17,802 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 17:10:17,802 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 17:10:17,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 17:10:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-06-05 17:10:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-06-05 17:10:17,843 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-06-05 17:10:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:17,843 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-06-05 17:10:17,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-06-05 17:10:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:17,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:17,847 INFO L521 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] [2021-06-05 17:10:18,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:18,065 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -154583568, now seen corresponding path program 1 times [2021-06-05 17:10:18,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:18,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241776108] [2021-06-05 17:10:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:18,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241776108] [2021-06-05 17:10:18,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241776108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675942953] [2021-06-05 17:10:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 17:10:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675942953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:18,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:18,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839032196] [2021-06-05 17:10:18,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:18,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:18,236 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:18,320 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-06-05 17:10:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:18,348 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 17:10:18,348 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 17:10:18,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 17:10:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-06-05 17:10:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-06-05 17:10:18,399 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-06-05 17:10:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:18,400 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-06-05 17:10:18,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-06-05 17:10:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:18,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:18,403 INFO L521 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] [2021-06-05 17:10:18,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:10:18,626 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1613744344, now seen corresponding path program 2 times [2021-06-05 17:10:18,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:18,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498675260] [2021-06-05 17:10:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:18,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498675260] [2021-06-05 17:10:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498675260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281610846] [2021-06-05 17:10:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:18,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:18,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281610846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:18,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:18,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653245371] [2021-06-05 17:10:18,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:18,792 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:18,875 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-06-05 17:10:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:18,884 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 17:10:18,884 INFO L226 Difference]: Without dead ends: 2085 [2021-06-05 17:10:18,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-06-05 17:10:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-06-05 17:10:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-06-05 17:10:18,931 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-06-05 17:10:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:18,931 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-06-05 17:10:18,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-06-05 17:10:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:18,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:18,936 INFO L521 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] [2021-06-05 17:10:19,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 17:10:19,159 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash 909626392, now seen corresponding path program 3 times [2021-06-05 17:10:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:19,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119511035] [2021-06-05 17:10:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:19,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:19,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119511035] [2021-06-05 17:10:19,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119511035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886416827] [2021-06-05 17:10:19,200 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 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 [2021-06-05 17:10:19,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:19,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:19,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:19,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886416827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761993260] [2021-06-05 17:10:19,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:19,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:19,293 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:19,368 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-06-05 17:10:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:19,375 INFO L225 Difference]: With dead ends: 2247 [2021-06-05 17:10:19,376 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 17:10:19,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 17:10:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-06-05 17:10:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-06-05 17:10:19,416 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-06-05 17:10:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:19,417 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-06-05 17:10:19,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-06-05 17:10:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:19,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:19,421 INFO L521 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] [2021-06-05 17:10:19,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:19,644 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash -461480336, now seen corresponding path program 1 times [2021-06-05 17:10:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507783564] [2021-06-05 17:10:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:19,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:19,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507783564] [2021-06-05 17:10:19,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507783564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:19,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:19,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 17:10:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373017431] [2021-06-05 17:10:19,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 17:10:19,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 17:10:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:10:19,679 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:19,736 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-06-05 17:10:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 17:10:19,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:19,741 INFO L225 Difference]: With dead ends: 1413 [2021-06-05 17:10:19,741 INFO L226 Difference]: Without dead ends: 1413 [2021-06-05 17:10:19,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:10:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-05 17:10:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-06-05 17:10:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-06-05 17:10:19,778 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-06-05 17:10:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:19,778 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-06-05 17:10:19,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-06-05 17:10:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:19,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:19,782 INFO L521 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] [2021-06-05 17:10:19,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 17:10:19,782 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:19,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1970176528, now seen corresponding path program 4 times [2021-06-05 17:10:19,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:19,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126038617] [2021-06-05 17:10:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126038617] [2021-06-05 17:10:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126038617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836924183] [2021-06-05 17:10:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:19,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:19,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836924183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:19,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:19,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016676653] [2021-06-05 17:10:19,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:19,933 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:19,993 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-06-05 17:10:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:20,004 INFO L225 Difference]: With dead ends: 2930 [2021-06-05 17:10:20,004 INFO L226 Difference]: Without dead ends: 2887 [2021-06-05 17:10:20,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-06-05 17:10:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-06-05 17:10:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-06-05 17:10:20,054 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-06-05 17:10:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,054 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-06-05 17:10:20,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-06-05 17:10:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:20,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:20,058 INFO L521 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] [2021-06-05 17:10:20,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:20,273 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -210123588, now seen corresponding path program 5 times [2021-06-05 17:10:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770718499] [2021-06-05 17:10:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:20,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:20,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770718499] [2021-06-05 17:10:20,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770718499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985823990] [2021-06-05 17:10:20,313 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 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 [2021-06-05 17:10:20,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:20,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985823990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234326586] [2021-06-05 17:10:20,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:20,394 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:20,462 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-06-05 17:10:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:20,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:20,470 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 17:10:20,470 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 17:10:20,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 17:10:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-06-05 17:10:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-06-05 17:10:20,514 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-06-05 17:10:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:20,515 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-06-05 17:10:20,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-06-05 17:10:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:20,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:20,519 INFO L521 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] [2021-06-05 17:10:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 17:10:20,743 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:20,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1981720148, now seen corresponding path program 6 times [2021-06-05 17:10:20,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:20,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353610799] [2021-06-05 17:10:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:20,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353610799] [2021-06-05 17:10:20,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353610799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118597473] [2021-06-05 17:10:20,782 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 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 [2021-06-05 17:10:20,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:20,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118597473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:20,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:20,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 17:10:20,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861854387] [2021-06-05 17:10:20,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:20,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:20,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:20,896 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:21,011 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-06-05 17:10:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:10:21,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:21,018 INFO L225 Difference]: With dead ends: 2600 [2021-06-05 17:10:21,018 INFO L226 Difference]: Without dead ends: 2557 [2021-06-05 17:10:21,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:10:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-05 17:10:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-06-05 17:10:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-06-05 17:10:21,091 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-06-05 17:10:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:21,091 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-06-05 17:10:21,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-06-05 17:10:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:21,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:21,098 INFO L521 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] [2021-06-05 17:10:21,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 17:10:21,313 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash 157052528, now seen corresponding path program 2 times [2021-06-05 17:10:21,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:21,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789915903] [2021-06-05 17:10:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:21,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789915903] [2021-06-05 17:10:21,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789915903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:21,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:21,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:10:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771959651] [2021-06-05 17:10:21,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:10:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:10:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:21,334 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:21,394 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-06-05 17:10:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:10:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:21,400 INFO L225 Difference]: With dead ends: 1899 [2021-06-05 17:10:21,400 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 17:10:21,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 17:10:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-06-05 17:10:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-06-05 17:10:21,440 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-06-05 17:10:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:21,440 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-06-05 17:10:21,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-06-05 17:10:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:21,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:21,444 INFO L521 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] [2021-06-05 17:10:21,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 17:10:21,444 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-06-05 17:10:21,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:21,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47389568] [2021-06-05 17:10:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47389568] [2021-06-05 17:10:21,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47389568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362961170] [2021-06-05 17:10:21,464 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 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 [2021-06-05 17:10:21,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:21,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362961170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:21,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:21,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 17:10:21,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627517154] [2021-06-05 17:10:21,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:21,554 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 17:10:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:21,711 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-06-05 17:10:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:10:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 23 [2021-06-05 17:10:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:21,721 INFO L225 Difference]: With dead ends: 3584 [2021-06-05 17:10:21,721 INFO L226 Difference]: Without dead ends: 3584 [2021-06-05 17:10:21,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:10:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-06-05 17:10:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-06-05 17:10:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-06-05 17:10:21,786 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-06-05 17:10:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:21,786 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-06-05 17:10:21,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 17:10:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-06-05 17:10:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:21,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:21,791 INFO L521 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] [2021-06-05 17:10:22,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 17:10:22,015 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-06-05 17:10:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:22,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805546554] [2021-06-05 17:10:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:22,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:22,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805546554] [2021-06-05 17:10:22,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805546554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361355671] [2021-06-05 17:10:22,036 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 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 [2021-06-05 17:10:22,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:22,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361355671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:22,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 17:10:22,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84525746] [2021-06-05 17:10:22,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:22,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:22,119 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 17:10:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:22,372 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-06-05 17:10:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:10:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 23 [2021-06-05 17:10:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:22,382 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 17:10:22,382 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 17:10:22,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 17:10:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-06-05 17:10:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-06-05 17:10:22,500 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-06-05 17:10:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:22,501 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-06-05 17:10:22,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 17:10:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-06-05 17:10:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:22,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:22,506 INFO L521 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] [2021-06-05 17:10:22,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:22,723 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-06-05 17:10:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:22,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239086515] [2021-06-05 17:10:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:22,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239086515] [2021-06-05 17:10:22,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239086515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322027151] [2021-06-05 17:10:22,764 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 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 [2021-06-05 17:10:22,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:22,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322027151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:22,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:22,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:22,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804498470] [2021-06-05 17:10:22,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:22,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:22,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:22,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:22,847 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:22,938 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-06-05 17:10:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:22,946 INFO L225 Difference]: With dead ends: 2707 [2021-06-05 17:10:22,946 INFO L226 Difference]: Without dead ends: 2643 [2021-06-05 17:10:22,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-05 17:10:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-06-05 17:10:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-06-05 17:10:23,007 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-06-05 17:10:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:23,007 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-06-05 17:10:23,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-06-05 17:10:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:23,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:23,013 INFO L521 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] [2021-06-05 17:10:23,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:23,237 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-06-05 17:10:23,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:23,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028526461] [2021-06-05 17:10:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:23,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:23,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028526461] [2021-06-05 17:10:23,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028526461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992603379] [2021-06-05 17:10:23,281 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 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 [2021-06-05 17:10:23,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:23,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:23,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992603379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:23,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:23,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704337511] [2021-06-05 17:10:23,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:23,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:23,371 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:23,443 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-06-05 17:10:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:23,448 INFO L225 Difference]: With dead ends: 2722 [2021-06-05 17:10:23,448 INFO L226 Difference]: Without dead ends: 2658 [2021-06-05 17:10:23,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-05 17:10:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-06-05 17:10:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-06-05 17:10:23,502 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-06-05 17:10:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-06-05 17:10:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-06-05 17:10:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:23,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:23,508 INFO L521 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] [2021-06-05 17:10:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:23,719 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-06-05 17:10:23,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:23,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096677393] [2021-06-05 17:10:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:23,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:23,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096677393] [2021-06-05 17:10:23,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096677393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55025866] [2021-06-05 17:10:23,770 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 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 [2021-06-05 17:10:23,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:10:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:10:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:23,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55025866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:23,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:23,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 17:10:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081220911] [2021-06-05 17:10:23,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:10:23,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:10:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:23,852 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:23,930 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-06-05 17:10:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 17:10:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:23,939 INFO L225 Difference]: With dead ends: 3086 [2021-06-05 17:10:23,940 INFO L226 Difference]: Without dead ends: 3022 [2021-06-05 17:10:23,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:10:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-05 17:10:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-06-05 17:10:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-06-05 17:10:24,004 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-06-05 17:10:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:24,004 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-06-05 17:10:24,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-06-05 17:10:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:24,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:24,011 INFO L521 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] [2021-06-05 17:10:24,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 17:10:24,225 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-06-05 17:10:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514356587] [2021-06-05 17:10:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:10:24,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514356587] [2021-06-05 17:10:24,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514356587] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:24,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:10:24,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:10:24,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477281012] [2021-06-05 17:10:24,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:10:24,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:24,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:10:24,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:24,248 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:24,303 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-06-05 17:10:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:10:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:10:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:24,310 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 17:10:24,311 INFO L226 Difference]: Without dead ends: 2525 [2021-06-05 17:10:24,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:10:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-05 17:10:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-06-05 17:10:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-06-05 17:10:24,366 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-06-05 17:10:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:24,366 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-06-05 17:10:24,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-06-05 17:10:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:24,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:24,373 INFO L521 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] [2021-06-05 17:10:24,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 17:10:24,373 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-06-05 17:10:24,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159345316] [2021-06-05 17:10:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159345316] [2021-06-05 17:10:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159345316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609907220] [2021-06-05 17:10:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:24,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:24,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609907220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:24,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 17:10:24,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934120322] [2021-06-05 17:10:24,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:10:24,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:10:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:10:24,484 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:24,591 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-06-05 17:10:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:10:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:24,597 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 17:10:24,597 INFO L226 Difference]: Without dead ends: 3537 [2021-06-05 17:10:24,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-05 17:10:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-06-05 17:10:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-06-05 17:10:24,657 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-06-05 17:10:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:24,657 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-06-05 17:10:24,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-06-05 17:10:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:24,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:24,664 INFO L521 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] [2021-06-05 17:10:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 17:10:24,877 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-06-05 17:10:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831801363] [2021-06-05 17:10:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831801363] [2021-06-05 17:10:24,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831801363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676090997] [2021-06-05 17:10:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:24,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:10:24,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:24,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:25,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676090997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:25,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:25,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 17:10:25,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469261463] [2021-06-05 17:10:25,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:25,002 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-05 17:10:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:25,142 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-06-05 17:10:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:10:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-06-05 17:10:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:25,152 INFO L225 Difference]: With dead ends: 5435 [2021-06-05 17:10:25,152 INFO L226 Difference]: Without dead ends: 5435 [2021-06-05 17:10:25,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:10:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-06-05 17:10:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-06-05 17:10:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-06-05 17:10:25,289 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-06-05 17:10:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:25,289 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-06-05 17:10:25,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-05 17:10:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-06-05 17:10:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:10:25,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:25,298 INFO L521 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] [2021-06-05 17:10:25,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 17:10:25,521 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-06-05 17:10:25,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:25,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959140309] [2021-06-05 17:10:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:25,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959140309] [2021-06-05 17:10:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959140309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551023200] [2021-06-05 17:10:25,540 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 [2021-06-05 17:10:25,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:10:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551023200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:25,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:25,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 17:10:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263575351] [2021-06-05 17:10:25,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:25,637 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-05 17:10:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:25,921 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-06-05 17:10:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:10:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-06-05 17:10:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:25,937 INFO L225 Difference]: With dead ends: 6635 [2021-06-05 17:10:25,937 INFO L226 Difference]: Without dead ends: 6635 [2021-06-05 17:10:25,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-06-05 17:10:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-06-05 17:10:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-06-05 17:10:26,055 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-06-05 17:10:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:26,055 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-06-05 17:10:26,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-05 17:10:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-06-05 17:10:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:26,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:26,065 INFO L521 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] [2021-06-05 17:10:26,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:10:26,265 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-06-05 17:10:26,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:26,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711118862] [2021-06-05 17:10:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:26,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:26,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711118862] [2021-06-05 17:10:26,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711118862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906024078] [2021-06-05 17:10:26,300 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 [2021-06-05 17:10:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906024078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:26,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:26,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 17:10:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906204592] [2021-06-05 17:10:26,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:10:26,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:10:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:26,399 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-06-05 17:10:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:26,597 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-06-05 17:10:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 25 [2021-06-05 17:10:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:26,614 INFO L225 Difference]: With dead ends: 8080 [2021-06-05 17:10:26,614 INFO L226 Difference]: Without dead ends: 7806 [2021-06-05 17:10:26,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:10:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-06-05 17:10:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-06-05 17:10:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-06-05 17:10:26,750 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-06-05 17:10:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:26,750 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-06-05 17:10:26,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-06-05 17:10:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-06-05 17:10:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:26,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:26,761 INFO L521 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] [2021-06-05 17:10:26,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:10:26,962 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-06-05 17:10:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:26,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071155142] [2021-06-05 17:10:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:27,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071155142] [2021-06-05 17:10:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071155142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889037029] [2021-06-05 17:10:27,027 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 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 [2021-06-05 17:10:27,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:10:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:27,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889037029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:27,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:10:27,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837010347] [2021-06-05 17:10:27,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:27,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:27,109 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:27,280 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-06-05 17:10:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:10:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:27,298 INFO L225 Difference]: With dead ends: 7686 [2021-06-05 17:10:27,298 INFO L226 Difference]: Without dead ends: 7610 [2021-06-05 17:10:27,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-06-05 17:10:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-06-05 17:10:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-06-05 17:10:27,415 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-06-05 17:10:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-06-05 17:10:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-06-05 17:10:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:27,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:27,427 INFO L521 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, 1, 1] [2021-06-05 17:10:27,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:27,627 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:27,628 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-06-05 17:10:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:27,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507535628] [2021-06-05 17:10:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:27,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507535628] [2021-06-05 17:10:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507535628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624615324] [2021-06-05 17:10:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 17:10:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624615324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:27,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:27,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 17:10:27,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516819997] [2021-06-05 17:10:27,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:27,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:27,845 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:28,262 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-06-05 17:10:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:10:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-06-05 17:10:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:28,304 INFO L225 Difference]: With dead ends: 13992 [2021-06-05 17:10:28,304 INFO L226 Difference]: Without dead ends: 13926 [2021-06-05 17:10:28,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-06-05 17:10:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-06-05 17:10:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-06-05 17:10:28,513 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-06-05 17:10:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:28,513 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-06-05 17:10:28,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-06-05 17:10:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:28,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:28,529 INFO L521 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, 1, 1] [2021-06-05 17:10:28,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 17:10:28,729 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-06-05 17:10:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065989694] [2021-06-05 17:10:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065989694] [2021-06-05 17:10:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065989694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480822355] [2021-06-05 17:10:28,831 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 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 [2021-06-05 17:10:28,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480822355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 17:10:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215288326] [2021-06-05 17:10:28,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:28,983 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:29,475 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-06-05 17:10:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:10:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-06-05 17:10:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:29,506 INFO L225 Difference]: With dead ends: 12594 [2021-06-05 17:10:29,506 INFO L226 Difference]: Without dead ends: 12594 [2021-06-05 17:10:29,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:10:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-06-05 17:10:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-06-05 17:10:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-06-05 17:10:29,737 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-06-05 17:10:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:29,737 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-06-05 17:10:29,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-06-05 17:10:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:29,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:29,753 INFO L521 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, 1, 1] [2021-06-05 17:10:29,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:29,954 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-06-05 17:10:29,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:29,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676376032] [2021-06-05 17:10:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:30,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676376032] [2021-06-05 17:10:30,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676376032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904068503] [2021-06-05 17:10:30,083 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 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 [2021-06-05 17:10:30,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:30,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:10:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:30,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904068503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:30,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:30,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:10:30,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350519643] [2021-06-05 17:10:30,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:10:30,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:10:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:30,251 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 17:10:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:30,959 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-06-05 17:10:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:10:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-06-05 17:10:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:31,089 INFO L225 Difference]: With dead ends: 29971 [2021-06-05 17:10:31,089 INFO L226 Difference]: Without dead ends: 29848 [2021-06-05 17:10:31,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:10:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-06-05 17:10:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-06-05 17:10:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-06-05 17:10:31,745 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-06-05 17:10:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:31,745 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-06-05 17:10:31,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 17:10:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-06-05 17:10:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:31,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:31,776 INFO L521 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, 1, 1] [2021-06-05 17:10:31,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 17:10:31,981 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-06-05 17:10:31,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:31,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369162337] [2021-06-05 17:10:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:32,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:32,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369162337] [2021-06-05 17:10:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369162337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:32,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538646293] [2021-06-05 17:10:32,110 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 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 [2021-06-05 17:10:32,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:32,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:10:32,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:32,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538646293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:32,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:32,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 17:10:32,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304432635] [2021-06-05 17:10:32,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:10:32,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:10:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:10:32,251 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:32,867 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-06-05 17:10:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:10:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:10:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:32,960 INFO L225 Difference]: With dead ends: 31001 [2021-06-05 17:10:32,960 INFO L226 Difference]: Without dead ends: 30851 [2021-06-05 17:10:32,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-06-05 17:10:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-06-05 17:10:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-06-05 17:10:33,671 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-06-05 17:10:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:33,671 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-06-05 17:10:33,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-06-05 17:10:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:33,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:33,715 INFO L521 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, 1, 1] [2021-06-05 17:10:33,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:33,915 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-06-05 17:10:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:33,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905299900] [2021-06-05 17:10:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:33,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905299900] [2021-06-05 17:10:33,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905299900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570666767] [2021-06-05 17:10:33,985 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 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 [2021-06-05 17:10:34,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:10:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570666767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:34,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:34,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:10:34,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134595799] [2021-06-05 17:10:34,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:10:34,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:34,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:10:34,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:10:34,138 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 17:10:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:34,646 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-06-05 17:10:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:10:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-06-05 17:10:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:34,735 INFO L225 Difference]: With dead ends: 27651 [2021-06-05 17:10:34,735 INFO L226 Difference]: Without dead ends: 27523 [2021-06-05 17:10:34,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:10:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-06-05 17:10:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-06-05 17:10:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-06-05 17:10:35,275 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-06-05 17:10:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:35,275 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-06-05 17:10:35,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 17:10:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-06-05 17:10:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:35,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:35,327 INFO L521 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, 1, 1] [2021-06-05 17:10:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 17:10:35,528 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-06-05 17:10:35,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:35,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563483960] [2021-06-05 17:10:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:35,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:35,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563483960] [2021-06-05 17:10:35,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563483960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:35,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711284947] [2021-06-05 17:10:35,614 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 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 [2021-06-05 17:10:35,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:10:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:10:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:35,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711284947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:35,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:35,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:10:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222799134] [2021-06-05 17:10:35,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:35,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:35,890 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:36,121 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-06-05 17:10:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:36,305 INFO L225 Difference]: With dead ends: 22500 [2021-06-05 17:10:36,305 INFO L226 Difference]: Without dead ends: 22316 [2021-06-05 17:10:36,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-06-05 17:10:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-06-05 17:10:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-06-05 17:10:36,811 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-06-05 17:10:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:36,811 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-06-05 17:10:36,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-06-05 17:10:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:36,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:36,851 INFO L521 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, 1, 1] [2021-06-05 17:10:37,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 17:10:37,053 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-06-05 17:10:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:37,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739017697] [2021-06-05 17:10:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739017697] [2021-06-05 17:10:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739017697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7636089] [2021-06-05 17:10:37,108 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 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 [2021-06-05 17:10:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:10:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7636089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:37,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:37,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 17:10:37,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023635788] [2021-06-05 17:10:37,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:10:37,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:10:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:10:37,239 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:37,602 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2021-06-05 17:10:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:38,027 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-06-05 17:10:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:10:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:10:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:38,432 INFO L225 Difference]: With dead ends: 37571 [2021-06-05 17:10:38,432 INFO L226 Difference]: Without dead ends: 37406 [2021-06-05 17:10:38,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:10:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-06-05 17:10:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-06-05 17:10:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-06-05 17:10:39,266 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-06-05 17:10:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:39,266 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-06-05 17:10:39,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-06-05 17:10:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:39,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:39,331 INFO L521 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, 1, 1] [2021-06-05 17:10:39,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:10:39,531 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-06-05 17:10:39,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:39,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157554666] [2021-06-05 17:10:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:39,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157554666] [2021-06-05 17:10:39,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157554666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152217695] [2021-06-05 17:10:39,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:10:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:39,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:10:39,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152217695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:39,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:10:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085002313] [2021-06-05 17:10:39,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:39,926 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-05 17:10:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:40,256 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-06-05 17:10:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 25 [2021-06-05 17:10:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:40,333 INFO L225 Difference]: With dead ends: 26558 [2021-06-05 17:10:40,333 INFO L226 Difference]: Without dead ends: 26388 [2021-06-05 17:10:40,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-06-05 17:10:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-06-05 17:10:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-06-05 17:10:41,037 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-06-05 17:10:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:41,037 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-06-05 17:10:41,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-05 17:10:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-06-05 17:10:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:41,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:41,094 INFO L521 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, 1, 1] [2021-06-05 17:10:41,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:41,294 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-06-05 17:10:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:41,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378923028] [2021-06-05 17:10:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378923028] [2021-06-05 17:10:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378923028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390245553] [2021-06-05 17:10:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 17:10:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:41,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390245553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:41,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:41,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 17:10:41,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004427487] [2021-06-05 17:10:41,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:10:41,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:10:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:41,419 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-06-05 17:10:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:41,927 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-06-05 17:10:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:10:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 25 [2021-06-05 17:10:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:42,026 INFO L225 Difference]: With dead ends: 28634 [2021-06-05 17:10:42,026 INFO L226 Difference]: Without dead ends: 28616 [2021-06-05 17:10:42,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:10:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-06-05 17:10:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-06-05 17:10:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-06-05 17:10:42,764 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-06-05 17:10:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:42,764 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-06-05 17:10:42,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-06-05 17:10:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-06-05 17:10:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:42,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:42,825 INFO L521 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, 1, 1] [2021-06-05 17:10:43,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 17:10:43,026 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-06-05 17:10:43,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:43,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433876304] [2021-06-05 17:10:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433876304] [2021-06-05 17:10:43,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433876304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064662302] [2021-06-05 17:10:43,057 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 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 [2021-06-05 17:10:43,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064662302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:43,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 17:10:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631121526] [2021-06-05 17:10:43,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:10:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:10:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:43,186 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-06-05 17:10:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:43,526 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-06-05 17:10:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 [2021-06-05 17:10:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:43,885 INFO L225 Difference]: With dead ends: 30645 [2021-06-05 17:10:43,885 INFO L226 Difference]: Without dead ends: 30645 [2021-06-05 17:10:43,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:10:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-06-05 17:10:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-06-05 17:10:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-06-05 17:10:44,711 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-06-05 17:10:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:44,711 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-06-05 17:10:44,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-06-05 17:10:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-06-05 17:10:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:44,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:44,782 INFO L521 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, 1, 1] [2021-06-05 17:10:44,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 17:10:44,985 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-06-05 17:10:44,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:44,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095302161] [2021-06-05 17:10:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:45,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:45,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095302161] [2021-06-05 17:10:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095302161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:45,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955199113] [2021-06-05 17:10:45,020 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 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 [2021-06-05 17:10:45,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:45,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:45,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:45,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955199113] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:10:45,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:10:45,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-06-05 17:10:45,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880735573] [2021-06-05 17:10:45,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:10:45,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:10:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:10:45,101 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:45,463 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-06-05 17:10:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:10:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:45,578 INFO L225 Difference]: With dead ends: 33932 [2021-06-05 17:10:45,578 INFO L226 Difference]: Without dead ends: 33850 [2021-06-05 17:10:45,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:10:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-06-05 17:10:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-06-05 17:10:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-06-05 17:10:46,384 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-06-05 17:10:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:46,384 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-06-05 17:10:46,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-06-05 17:10:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:46,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:46,441 INFO L521 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] [2021-06-05 17:10:46,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:46,642 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-06-05 17:10:46,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:46,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199533304] [2021-06-05 17:10:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:46,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199533304] [2021-06-05 17:10:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199533304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195068607] [2021-06-05 17:10:46,692 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:46,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:46,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:10:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:46,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195068607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:46,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:46,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:10:46,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329149298] [2021-06-05 17:10:46,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:46,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:46,764 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:47,278 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-06-05 17:10:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:10:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:47,375 INFO L225 Difference]: With dead ends: 29638 [2021-06-05 17:10:47,376 INFO L226 Difference]: Without dead ends: 29562 [2021-06-05 17:10:47,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-06-05 17:10:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-06-05 17:10:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-06-05 17:10:48,354 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-06-05 17:10:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:48,354 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-06-05 17:10:48,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-06-05 17:10:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:48,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:48,426 INFO L521 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] [2021-06-05 17:10:48,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 17:10:48,626 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:48,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-06-05 17:10:48,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:48,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578420313] [2021-06-05 17:10:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:48,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578420313] [2021-06-05 17:10:48,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578420313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:48,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771764365] [2021-06-05 17:10:48,700 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 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 [2021-06-05 17:10:48,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:10:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:10:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:48,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771764365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:48,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:48,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:10:48,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634115477] [2021-06-05 17:10:48,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:48,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:48,781 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:49,083 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-06-05 17:10:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:10:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:49,184 INFO L225 Difference]: With dead ends: 29552 [2021-06-05 17:10:49,184 INFO L226 Difference]: Without dead ends: 29476 [2021-06-05 17:10:49,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-06-05 17:10:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-06-05 17:10:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-06-05 17:10:49,968 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-06-05 17:10:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:49,968 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-06-05 17:10:49,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-06-05 17:10:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:50,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:50,033 INFO L521 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, 1, 1] [2021-06-05 17:10:50,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:50,234 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-06-05 17:10:50,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:50,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705212605] [2021-06-05 17:10:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:50,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:50,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705212605] [2021-06-05 17:10:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705212605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:50,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484649886] [2021-06-05 17:10:50,270 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 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 [2021-06-05 17:10:50,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:10:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484649886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:50,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:50,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 17:10:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619219725] [2021-06-05 17:10:50,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:50,379 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:51,263 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-06-05 17:10:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:10:51,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-06-05 17:10:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:51,519 INFO L225 Difference]: With dead ends: 58244 [2021-06-05 17:10:51,519 INFO L226 Difference]: Without dead ends: 58083 [2021-06-05 17:10:51,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:10:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-06-05 17:10:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-06-05 17:10:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-06-05 17:10:53,023 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-06-05 17:10:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:53,023 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-06-05 17:10:53,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-06-05 17:10:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:53,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:53,137 INFO L521 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, 1, 1] [2021-06-05 17:10:53,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 17:10:53,337 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-06-05 17:10:53,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:53,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114516367] [2021-06-05 17:10:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:53,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114516367] [2021-06-05 17:10:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114516367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130792679] [2021-06-05 17:10:53,370 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 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 [2021-06-05 17:10:53,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:10:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:53,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130792679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:53,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:53,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 17:10:53,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217852433] [2021-06-05 17:10:53,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:10:53,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:53,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:10:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:10:53,494 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:54,690 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-06-05 17:10:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:10:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-06-05 17:10:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:54,969 INFO L225 Difference]: With dead ends: 83779 [2021-06-05 17:10:54,969 INFO L226 Difference]: Without dead ends: 83779 [2021-06-05 17:10:54,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-06-05 17:10:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-06-05 17:10:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-06-05 17:10:57,278 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-06-05 17:10:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:57,278 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-06-05 17:10:57,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-06-05 17:10:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-06-05 17:10:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:10:57,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:57,444 INFO L521 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] [2021-06-05 17:10:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 17:10:57,649 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-06-05 17:10:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766250318] [2021-06-05 17:10:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:57,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766250318] [2021-06-05 17:10:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766250318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858720105] [2021-06-05 17:10:57,746 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 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 [2021-06-05 17:10:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:10:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:57,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858720105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:57,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:57,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:10:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131301610] [2021-06-05 17:10:57,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:10:57,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:10:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:57,832 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:58,889 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-06-05 17:10:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:10:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:10:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:59,166 INFO L225 Difference]: With dead ends: 74099 [2021-06-05 17:10:59,167 INFO L226 Difference]: Without dead ends: 74023 [2021-06-05 17:10:59,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:10:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-06-05 17:11:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-06-05 17:11:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-06-05 17:11:01,559 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-06-05 17:11:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:01,559 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-06-05 17:11:01,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-06-05 17:11:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:01,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:01,722 INFO L521 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] [2021-06-05 17:11:01,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 17:11:01,923 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-06-05 17:11:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:01,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307297249] [2021-06-05 17:11:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:11:02,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:02,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307297249] [2021-06-05 17:11:02,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307297249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:02,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638223698] [2021-06-05 17:11:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 17:11:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:11:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:11:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638223698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:11:02,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419767989] [2021-06-05 17:11:02,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:11:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:11:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:11:02,088 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:03,133 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-06-05 17:11:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:11:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:11:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:03,424 INFO L225 Difference]: With dead ends: 73874 [2021-06-05 17:11:03,424 INFO L226 Difference]: Without dead ends: 73798 [2021-06-05 17:11:03,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:11:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-06-05 17:11:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-06-05 17:11:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-06-05 17:11:05,497 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-06-05 17:11:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:05,498 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-06-05 17:11:05,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-06-05 17:11:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:06,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:06,159 INFO L521 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, 1, 1] [2021-06-05 17:11:06,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 17:11:06,373 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-06-05 17:11:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794045041] [2021-06-05 17:11:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:06,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794045041] [2021-06-05 17:11:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794045041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37649038] [2021-06-05 17:11:06,418 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 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 [2021-06-05 17:11:06,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:06,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:11:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37649038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:06,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:06,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 17:11:06,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597151690] [2021-06-05 17:11:06,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:11:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:11:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:11:06,549 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:07,434 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-06-05 17:11:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:11:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:11:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:08,421 INFO L225 Difference]: With dead ends: 113780 [2021-06-05 17:11:08,421 INFO L226 Difference]: Without dead ends: 113660 [2021-06-05 17:11:08,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:11:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-06-05 17:11:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-06-05 17:11:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-06-05 17:11:11,557 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-06-05 17:11:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:11,557 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-06-05 17:11:11,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-06-05 17:11:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:11,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:11,784 INFO L521 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, 1, 1] [2021-06-05 17:11:11,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:11,984 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-06-05 17:11:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483655941] [2021-06-05 17:11:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:12,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483655941] [2021-06-05 17:11:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483655941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176462936] [2021-06-05 17:11:12,048 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 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 [2021-06-05 17:11:12,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:11:12,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:12,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:11:12,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176462936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:12,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:12,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:11:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672890503] [2021-06-05 17:11:12,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:11:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:11:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:11:12,191 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 17:11:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:14,224 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-06-05 17:11:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:11:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-05 17:11:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:15,717 INFO L225 Difference]: With dead ends: 199161 [2021-06-05 17:11:15,717 INFO L226 Difference]: Without dead ends: 199068 [2021-06-05 17:11:15,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-06-05 17:11:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-06-05 17:11:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-06-05 17:11:20,766 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-06-05 17:11:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:20,767 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-06-05 17:11:20,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 17:11:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-06-05 17:11:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:21,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:21,763 INFO L521 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, 1, 1] [2021-06-05 17:11:21,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 17:11:21,985 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-06-05 17:11:21,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:21,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700242671] [2021-06-05 17:11:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:22,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:22,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700242671] [2021-06-05 17:11:22,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700242671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:22,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13589709] [2021-06-05 17:11:22,031 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 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 [2021-06-05 17:11:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:11:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13589709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:22,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:22,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:11:22,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852138138] [2021-06-05 17:11:22,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:11:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:11:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:11:22,172 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 17:11:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:24,246 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-06-05 17:11:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:11:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-06-05 17:11:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:25,114 INFO L225 Difference]: With dead ends: 206475 [2021-06-05 17:11:25,114 INFO L226 Difference]: Without dead ends: 206475 [2021-06-05 17:11:25,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:11:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-06-05 17:11:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-06-05 17:11:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-06-05 17:11:31,187 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-06-05 17:11:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:31,187 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-06-05 17:11:31,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 17:11:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-06-05 17:11:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:31,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:31,510 INFO L521 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, 1, 1] [2021-06-05 17:11:31,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:31,711 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-06-05 17:11:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328485318] [2021-06-05 17:11:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:31,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328485318] [2021-06-05 17:11:31,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328485318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840895369] [2021-06-05 17:11:31,759 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 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 [2021-06-05 17:11:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:11:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:31,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840895369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:31,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:31,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 17:11:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538645668] [2021-06-05 17:11:31,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:11:31,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:11:31,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:11:31,865 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:33,835 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-06-05 17:11:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:11:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:11:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:34,443 INFO L225 Difference]: With dead ends: 158888 [2021-06-05 17:11:34,444 INFO L226 Difference]: Without dead ends: 158813 [2021-06-05 17:11:34,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:11:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-06-05 17:11:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-06-05 17:11:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-06-05 17:11:40,119 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-06-05 17:11:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:40,119 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-06-05 17:11:40,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-06-05 17:11:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:40,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:40,460 INFO L521 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, 1, 1] [2021-06-05 17:11:40,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:40,660 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-06-05 17:11:40,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:40,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021998845] [2021-06-05 17:11:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:40,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:40,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021998845] [2021-06-05 17:11:40,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021998845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:40,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925990984] [2021-06-05 17:11:40,705 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 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 [2021-06-05 17:11:40,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:11:40,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:11:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925990984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:40,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:40,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:11:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729391056] [2021-06-05 17:11:40,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:11:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:11:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:11:40,849 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:44,100 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-06-05 17:11:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:11:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:11:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:46,262 INFO L225 Difference]: With dead ends: 274279 [2021-06-05 17:11:46,262 INFO L226 Difference]: Without dead ends: 274261 [2021-06-05 17:11:46,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:11:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-06-05 17:11:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-06-05 17:11:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-06-05 17:11:52,578 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-06-05 17:11:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:52,579 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-06-05 17:11:52,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-06-05 17:11:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:11:52,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:52,957 INFO L521 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, 1, 1] [2021-06-05 17:11:53,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 17:11:53,158 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 681395814, now seen corresponding path program 16 times [2021-06-05 17:11:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:53,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596346985] [2021-06-05 17:11:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:53,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:53,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596346985] [2021-06-05 17:11:53,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596346985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:53,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957284881] [2021-06-05 17:11:53,205 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 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 [2021-06-05 17:11:53,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:53,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:11:53,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957284881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:53,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:53,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:11:53,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738063798] [2021-06-05 17:11:53,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:11:53,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:11:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:11:53,370 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-06-05 17:11:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:55,693 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-06-05 17:11:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:11:55,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 [2021-06-05 17:11:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:57,296 INFO L225 Difference]: With dead ends: 228605 [2021-06-05 17:11:57,296 INFO L226 Difference]: Without dead ends: 228605 [2021-06-05 17:11:57,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:11:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-06-05 17:12:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-06-05 17:12:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-06-05 17:12:02,652 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-06-05 17:12:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:02,652 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-06-05 17:12:02,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-06-05 17:12:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-06-05 17:12:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:02,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:02,958 INFO L521 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, 1, 1] [2021-06-05 17:12:03,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:03,159 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-06-05 17:12:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:03,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917279423] [2021-06-05 17:12:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:03,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917279423] [2021-06-05 17:12:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917279423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766070739] [2021-06-05 17:12:03,209 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:03,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:12:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:12:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766070739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:03,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:03,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:12:03,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321142361] [2021-06-05 17:12:03,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:12:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:12:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:12:03,361 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 17:12:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:05,394 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-06-05 17:12:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:12:05,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-05 17:12:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:06,727 INFO L225 Difference]: With dead ends: 181963 [2021-06-05 17:12:06,728 INFO L226 Difference]: Without dead ends: 181963 [2021-06-05 17:12:06,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:12:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-06-05 17:12:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-06-05 17:12:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-06-05 17:12:11,820 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-06-05 17:12:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:11,820 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-06-05 17:12:11,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 17:12:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-06-05 17:12:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:12,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:12,138 INFO L521 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, 1, 1] [2021-06-05 17:12:12,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 17:12:12,338 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-06-05 17:12:12,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:12,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865435129] [2021-06-05 17:12:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:12,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:12,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865435129] [2021-06-05 17:12:12,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865435129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:12,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264255583] [2021-06-05 17:12:12,398 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 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 [2021-06-05 17:12:12,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:12:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:12:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:12,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264255583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:12,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:12,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 17:12:12,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58096249] [2021-06-05 17:12:12,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:12:12,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:12,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:12:12,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:12:12,521 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 17:12:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:14,510 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-06-05 17:12:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:12:14,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 25 [2021-06-05 17:12:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:15,863 INFO L225 Difference]: With dead ends: 192198 [2021-06-05 17:12:15,863 INFO L226 Difference]: Without dead ends: 192052 [2021-06-05 17:12:15,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:12:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-06-05 17:12:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-06-05 17:12:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-06-05 17:12:21,139 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-06-05 17:12:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:21,139 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-06-05 17:12:21,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 17:12:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-06-05 17:12:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:21,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:21,460 INFO L521 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, 1, 1] [2021-06-05 17:12:21,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:21,661 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-06-05 17:12:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892419418] [2021-06-05 17:12:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:21,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892419418] [2021-06-05 17:12:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892419418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580898015] [2021-06-05 17:12:21,721 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 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 [2021-06-05 17:12:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:12:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:21,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580898015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:21,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:21,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 17:12:21,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300773070] [2021-06-05 17:12:21,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:12:21,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:21,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:12:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:12:21,837 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:23,609 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-06-05 17:12:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:12:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:12:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:24,213 INFO L225 Difference]: With dead ends: 151664 [2021-06-05 17:12:24,213 INFO L226 Difference]: Without dead ends: 151407 [2021-06-05 17:12:24,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:12:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-06-05 17:12:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-06-05 17:12:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-06-05 17:12:28,902 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-06-05 17:12:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:28,902 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-06-05 17:12:28,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-06-05 17:12:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:30,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:30,077 INFO L521 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, 1, 1] [2021-06-05 17:12:30,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 17:12:30,278 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-06-05 17:12:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:30,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342324419] [2021-06-05 17:12:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:30,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:30,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342324419] [2021-06-05 17:12:30,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342324419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:30,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781535645] [2021-06-05 17:12:30,336 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 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 [2021-06-05 17:12:30,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:12:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:30,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781535645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:30,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:30,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 17:12:30,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517538672] [2021-06-05 17:12:30,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:12:30,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:12:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:12:30,497 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 17:12:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:32,458 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-06-05 17:12:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:12:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-06-05 17:12:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:33,168 INFO L225 Difference]: With dead ends: 193192 [2021-06-05 17:12:33,168 INFO L226 Difference]: Without dead ends: 193064 [2021-06-05 17:12:33,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:12:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-06-05 17:12:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-06-05 17:12:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-06-05 17:12:38,149 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-06-05 17:12:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:38,149 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-06-05 17:12:38,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-06-05 17:12:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-06-05 17:12:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:39,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:39,555 INFO L521 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] [2021-06-05 17:12:39,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 17:12:39,778 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-06-05 17:12:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:39,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892552150] [2021-06-05 17:12:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:39,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892552150] [2021-06-05 17:12:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892552150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25766323] [2021-06-05 17:12:39,838 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 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 [2021-06-05 17:12:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:12:39,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:40,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25766323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:40,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:40,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:12:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551737208] [2021-06-05 17:12:40,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:12:40,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:12:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:12:40,029 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:41,514 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-06-05 17:12:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:12:41,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:12:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:42,932 INFO L225 Difference]: With dead ends: 156612 [2021-06-05 17:12:42,932 INFO L226 Difference]: Without dead ends: 156525 [2021-06-05 17:12:42,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:12:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-06-05 17:12:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-06-05 17:12:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-06-05 17:12:48,167 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-06-05 17:12:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:48,167 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-06-05 17:12:48,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-06-05 17:12:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:48,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:48,534 INFO L521 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, 1, 1] [2021-06-05 17:12:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:48,735 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-06-05 17:12:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:48,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914191245] [2021-06-05 17:12:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:48,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:48,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914191245] [2021-06-05 17:12:48,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914191245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:48,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437274944] [2021-06-05 17:12:48,780 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:48,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:12:48,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:12:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437274944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:48,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:48,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:12:48,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120596822] [2021-06-05 17:12:48,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:12:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:12:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:12:48,901 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 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) [2021-06-05 17:12:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:50,761 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-06-05 17:12:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:12:50,761 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 25 [2021-06-05 17:12:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:51,397 INFO L225 Difference]: With dead ends: 156333 [2021-06-05 17:12:51,397 INFO L226 Difference]: Without dead ends: 156315 [2021-06-05 17:12:51,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:12:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-06-05 17:12:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-06-05 17:12:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-06-05 17:12:56,246 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-06-05 17:12:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:56,246 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-06-05 17:12:56,246 INFO L483 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) [2021-06-05 17:12:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-06-05 17:12:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:12:57,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:57,432 INFO L521 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, 1, 1] [2021-06-05 17:12:57,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 17:12:57,633 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-06-05 17:12:57,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:57,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774504416] [2021-06-05 17:12:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774504416] [2021-06-05 17:12:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774504416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599475416] [2021-06-05 17:12:57,661 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 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 [2021-06-05 17:12:57,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:12:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599475416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:12:57,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002599145] [2021-06-05 17:12:57,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:12:57,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:12:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:12:57,764 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 17:12:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:59,566 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-06-05 17:12:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:12:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 [2021-06-05 17:12:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:00,225 INFO L225 Difference]: With dead ends: 161541 [2021-06-05 17:13:00,225 INFO L226 Difference]: Without dead ends: 161541 [2021-06-05 17:13:00,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:13:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-06-05 17:13:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-06-05 17:13:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-06-05 17:13:05,063 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-06-05 17:13:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:05,064 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-06-05 17:13:05,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 17:13:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-06-05 17:13:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:05,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:05,390 INFO L521 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, 1, 1] [2021-06-05 17:13:05,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:05,591 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-06-05 17:13:05,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:05,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379089583] [2021-06-05 17:13:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:05,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379089583] [2021-06-05 17:13:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379089583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472753948] [2021-06-05 17:13:05,624 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 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 [2021-06-05 17:13:05,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:13:05,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:13:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472753948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:05,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:05,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:13:05,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042792701] [2021-06-05 17:13:05,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:13:05,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:13:05,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:13:05,723 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:13:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:07,692 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-06-05 17:13:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:13:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-05 17:13:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:08,300 INFO L225 Difference]: With dead ends: 156029 [2021-06-05 17:13:08,300 INFO L226 Difference]: Without dead ends: 156011 [2021-06-05 17:13:08,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:13:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-06-05 17:13:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-06-05 17:13:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-06-05 17:13:13,646 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-06-05 17:13:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:13,646 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-06-05 17:13:13,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:13:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-06-05 17:13:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:14,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:14,026 INFO L521 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, 1, 1] [2021-06-05 17:13:14,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 17:13:14,228 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-06-05 17:13:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497136877] [2021-06-05 17:13:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:14,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497136877] [2021-06-05 17:13:14,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497136877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:14,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120790921] [2021-06-05 17:13:14,268 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 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 [2021-06-05 17:13:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:13:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:14,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120790921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:14,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:14,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:13:14,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904362309] [2021-06-05 17:13:14,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:13:14,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:13:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:13:14,373 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:16,415 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-06-05 17:13:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:13:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-05 17:13:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:17,185 INFO L225 Difference]: With dead ends: 187205 [2021-06-05 17:13:17,185 INFO L226 Difference]: Without dead ends: 187205 [2021-06-05 17:13:17,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:13:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-06-05 17:13:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-06-05 17:13:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-06-05 17:13:22,866 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-06-05 17:13:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:22,866 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-06-05 17:13:22,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-06-05 17:13:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:23,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:23,298 INFO L521 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, 1, 1] [2021-06-05 17:13:23,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:23,499 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:23,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:23,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-06-05 17:13:23,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:23,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957264322] [2021-06-05 17:13:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:23,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957264322] [2021-06-05 17:13:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957264322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263349299] [2021-06-05 17:13:23,559 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 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 [2021-06-05 17:13:23,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:13:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:23,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:13:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:23,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263349299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:23,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:23,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:13:23,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251949952] [2021-06-05 17:13:23,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:13:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:13:23,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:13:23,668 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:25,504 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-06-05 17:13:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:13:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-05 17:13:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:26,107 INFO L225 Difference]: With dead ends: 153348 [2021-06-05 17:13:26,107 INFO L226 Difference]: Without dead ends: 153248 [2021-06-05 17:13:26,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:13:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-06-05 17:13:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-06-05 17:13:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-06-05 17:13:32,045 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-06-05 17:13:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:32,046 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-06-05 17:13:32,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-06-05 17:13:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:32,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:32,528 INFO L521 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, 1, 1] [2021-06-05 17:13:32,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:32,741 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-06-05 17:13:32,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:32,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957192554] [2021-06-05 17:13:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:32,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:32,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957192554] [2021-06-05 17:13:32,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957192554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:32,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429245384] [2021-06-05 17:13:32,781 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 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 [2021-06-05 17:13:32,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:13:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:13:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429245384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:32,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:32,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:13:32,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059587207] [2021-06-05 17:13:32,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:13:32,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:13:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:13:32,878 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 17:13:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:35,387 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-06-05 17:13:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:13:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-06-05 17:13:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:37,091 INFO L225 Difference]: With dead ends: 254992 [2021-06-05 17:13:37,091 INFO L226 Difference]: Without dead ends: 254992 [2021-06-05 17:13:37,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:13:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-06-05 17:13:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-06-05 17:13:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-06-05 17:13:43,670 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-06-05 17:13:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:43,670 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-06-05 17:13:43,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 17:13:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-06-05 17:13:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:44,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:44,087 INFO L521 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, 1, 1] [2021-06-05 17:13:44,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:44,288 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-06-05 17:13:44,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:44,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223597582] [2021-06-05 17:13:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:44,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223597582] [2021-06-05 17:13:44,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223597582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386181419] [2021-06-05 17:13:44,332 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 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 [2021-06-05 17:13:44,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:13:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:13:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386181419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:44,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:44,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:13:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692915279] [2021-06-05 17:13:44,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:13:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:13:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:13:44,424 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:46,734 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-06-05 17:13:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:13:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-05 17:13:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:48,289 INFO L225 Difference]: With dead ends: 216803 [2021-06-05 17:13:48,289 INFO L226 Difference]: Without dead ends: 216803 [2021-06-05 17:13:48,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:13:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-06-05 17:13:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-06-05 17:13:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-06-05 17:13:54,799 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-06-05 17:13:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:54,799 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-06-05 17:13:54,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:13:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-06-05 17:13:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:13:55,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:55,212 INFO L521 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, 1, 1] [2021-06-05 17:13:55,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:55,413 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-06-05 17:13:55,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:55,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878894043] [2021-06-05 17:13:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:55,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:55,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878894043] [2021-06-05 17:13:55,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878894043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:55,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564869761] [2021-06-05 17:13:55,563 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 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 [2021-06-05 17:13:55,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:13:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:13:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:55,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564869761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:55,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:55,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 17:13:55,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34530684] [2021-06-05 17:13:55,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:13:55,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:55,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:13:55,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:13:55,713 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-06-05 17:13:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:57,747 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-06-05 17:13:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:13:57,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-06-05 17:13:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:58,548 INFO L225 Difference]: With dead ends: 190564 [2021-06-05 17:13:58,548 INFO L226 Difference]: Without dead ends: 190336 [2021-06-05 17:13:58,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:13:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-06-05 17:14:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-06-05 17:14:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-06-05 17:14:04,676 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-06-05 17:14:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:04,677 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-06-05 17:14:04,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-06-05 17:14:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-06-05 17:14:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:14:05,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:05,042 INFO L521 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, 1, 1] [2021-06-05 17:14:05,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 17:14:05,243 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-06-05 17:14:05,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:05,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244030945] [2021-06-05 17:14:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:05,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244030945] [2021-06-05 17:14:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244030945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377772605] [2021-06-05 17:14:05,281 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 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 [2021-06-05 17:14:05,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 17:14:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:14:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:05,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377772605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:05,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:05,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 17:14:05,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735117436] [2021-06-05 17:14:05,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:14:05,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:05,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:14:05,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:14:05,418 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 17:14:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:08,486 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-06-05 17:14:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:14:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 [2021-06-05 17:14:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:09,589 INFO L225 Difference]: With dead ends: 262079 [2021-06-05 17:14:09,589 INFO L226 Difference]: Without dead ends: 262061 [2021-06-05 17:14:09,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 957.8ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:14:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-06-05 17:14:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-06-05 17:14:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-06-05 17:14:17,083 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-06-05 17:14:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:17,083 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-06-05 17:14:17,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 17:14:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-06-05 17:14:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:14:17,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:17,532 INFO L521 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, 1, 1] [2021-06-05 17:14:17,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:17,732 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-06-05 17:14:17,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:17,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669341885] [2021-06-05 17:14:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:17,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:17,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669341885] [2021-06-05 17:14:17,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669341885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367813579] [2021-06-05 17:14:17,776 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 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 [2021-06-05 17:14:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:14:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367813579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:14:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376520061] [2021-06-05 17:14:17,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:14:17,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:14:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:14:17,876 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 17:14:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:20,233 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-06-05 17:14:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:14:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 25 [2021-06-05 17:14:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:21,991 INFO L225 Difference]: With dead ends: 223330 [2021-06-05 17:14:21,991 INFO L226 Difference]: Without dead ends: 223330 [2021-06-05 17:14:21,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:14:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-06-05 17:14:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-06-05 17:14:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-06-05 17:14:28,750 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-06-05 17:14:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:28,750 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-06-05 17:14:28,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 17:14:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-06-05 17:14:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:14:30,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:30,022 INFO L521 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, 1, 1] [2021-06-05 17:14:30,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 17:14:30,223 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-06-05 17:14:30,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:30,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098061923] [2021-06-05 17:14:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:30,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098061923] [2021-06-05 17:14:30,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098061923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043768074] [2021-06-05 17:14:30,264 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 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 [2021-06-05 17:14:30,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:14:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:14:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:30,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043768074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:14:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436111385] [2021-06-05 17:14:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:14:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:14:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:14:30,380 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 17:14:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:32,796 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-06-05 17:14:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:14:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 25 [2021-06-05 17:14:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:34,571 INFO L225 Difference]: With dead ends: 271293 [2021-06-05 17:14:34,571 INFO L226 Difference]: Without dead ends: 271293 [2021-06-05 17:14:34,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:14:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-06-05 17:14:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-06-05 17:14:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-06-05 17:14:41,845 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-06-05 17:14:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:41,845 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-06-05 17:14:41,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 17:14:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-06-05 17:14:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:14:42,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:42,231 INFO L521 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, 1, 1] [2021-06-05 17:14:42,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:14:42,432 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-06-05 17:14:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448858584] [2021-06-05 17:14:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:43,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:43,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448858584] [2021-06-05 17:14:43,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448858584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:43,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665492420] [2021-06-05 17:14:43,271 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 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 [2021-06-05 17:14:43,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:14:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:14:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:43,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665492420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:43,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:43,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:14:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831242950] [2021-06-05 17:14:43,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:14:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:14:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:14:43,381 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:45,474 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-06-05 17:14:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:14:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:14:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:46,462 INFO L225 Difference]: With dead ends: 228294 [2021-06-05 17:14:46,462 INFO L226 Difference]: Without dead ends: 228294 [2021-06-05 17:14:46,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 912.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:14:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-06-05 17:14:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-06-05 17:14:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-06-05 17:14:53,048 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-06-05 17:14:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:14:53,049 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-06-05 17:14:53,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:14:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-06-05 17:14:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:14:54,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:14:54,332 INFO L521 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, 1, 1] [2021-06-05 17:14:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 17:14:54,532 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:14:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:14:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-06-05 17:14:54,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:14:54,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025668316] [2021-06-05 17:14:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:14:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:14:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:54,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:14:54,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025668316] [2021-06-05 17:14:54,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025668316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:54,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496902536] [2021-06-05 17:14:54,589 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 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 [2021-06-05 17:14:54,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:14:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:14:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:14:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:14:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:14:54,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496902536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:14:54,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:14:54,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 17:14:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132160813] [2021-06-05 17:14:54,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:14:54,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:14:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:14:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:14:54,732 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 17:14:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:14:56,712 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-06-05 17:14:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:14:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 [2021-06-05 17:14:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:14:57,566 INFO L225 Difference]: With dead ends: 206101 [2021-06-05 17:14:57,567 INFO L226 Difference]: Without dead ends: 205937 [2021-06-05 17:14:57,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:14:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-06-05 17:15:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-06-05 17:15:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-06-05 17:15:04,031 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-06-05 17:15:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:04,032 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-06-05 17:15:04,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-06-05 17:15:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-06-05 17:15:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:04,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:04,444 INFO L521 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, 1, 1] [2021-06-05 17:15:04,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 17:15:04,645 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-06-05 17:15:04,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:04,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101135847] [2021-06-05 17:15:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:04,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:04,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101135847] [2021-06-05 17:15:04,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101135847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:04,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909331136] [2021-06-05 17:15:04,698 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 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 [2021-06-05 17:15:04,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:15:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:15:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:15:04,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909331136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:04,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:04,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:15:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371529645] [2021-06-05 17:15:04,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:15:04,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:15:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:15:04,800 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-05 17:15:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:06,904 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-06-05 17:15:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:15:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 25 [2021-06-05 17:15:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:08,269 INFO L225 Difference]: With dead ends: 182017 [2021-06-05 17:15:08,269 INFO L226 Difference]: Without dead ends: 181917 [2021-06-05 17:15:08,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:15:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-06-05 17:15:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-06-05 17:15:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-06-05 17:15:14,761 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-06-05 17:15:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-06-05 17:15:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-05 17:15:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-06-05 17:15:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:15,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:15,883 INFO L521 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] [2021-06-05 17:15:16,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 17:15:16,097 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash -59787534, now seen corresponding path program 7 times [2021-06-05 17:15:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444461528] [2021-06-05 17:15:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:16,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:16,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444461528] [2021-06-05 17:15:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444461528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:15:16,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:15:16,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 17:15:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120415335] [2021-06-05 17:15:16,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:15:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:16,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:15:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:15:16,123 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:18,605 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-06-05 17:15:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:15:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:19,844 INFO L225 Difference]: With dead ends: 198214 [2021-06-05 17:15:19,844 INFO L226 Difference]: Without dead ends: 164346 [2021-06-05 17:15:19,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:15:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-06-05 17:15:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-06-05 17:15:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-06-05 17:15:25,046 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-06-05 17:15:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:25,046 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-06-05 17:15:25,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-06-05 17:15:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:25,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:25,350 INFO L521 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] [2021-06-05 17:15:25,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-05 17:15:25,351 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1733798960, now seen corresponding path program 8 times [2021-06-05 17:15:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:25,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921396657] [2021-06-05 17:15:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921396657] [2021-06-05 17:15:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921396657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174979909] [2021-06-05 17:15:25,376 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 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 [2021-06-05 17:15:25,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:15:25,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:15:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174979909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:15:25,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 17:15:25,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-06-05 17:15:25,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901180664] [2021-06-05 17:15:25,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:15:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:15:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:15:25,463 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:27,084 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-06-05 17:15:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:15:27,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:27,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:27,643 INFO L225 Difference]: With dead ends: 130126 [2021-06-05 17:15:27,643 INFO L226 Difference]: Without dead ends: 127575 [2021-06-05 17:15:27,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:15:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-06-05 17:15:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-06-05 17:15:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-06-05 17:15:30,611 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-06-05 17:15:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:30,611 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-06-05 17:15:30,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-06-05 17:15:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:30,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:30,810 INFO L521 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] [2021-06-05 17:15:31,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 17:15:31,011 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-06-05 17:15:31,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:31,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171065770] [2021-06-05 17:15:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:31,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171065770] [2021-06-05 17:15:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171065770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101286262] [2021-06-05 17:15:31,056 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:31,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:15:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101286262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:31,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253371843] [2021-06-05 17:15:31,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:31,118 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:32,279 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-06-05 17:15:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:32,604 INFO L225 Difference]: With dead ends: 89555 [2021-06-05 17:15:32,604 INFO L226 Difference]: Without dead ends: 89419 [2021-06-05 17:15:32,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-06-05 17:15:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-06-05 17:15:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-06-05 17:15:35,454 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-06-05 17:15:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:35,454 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-06-05 17:15:35,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-06-05 17:15:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:35,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:35,674 INFO L521 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] [2021-06-05 17:15:35,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:35,875 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-06-05 17:15:35,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:35,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447745705] [2021-06-05 17:15:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:35,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:35,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447745705] [2021-06-05 17:15:35,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447745705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:35,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479330047] [2021-06-05 17:15:35,930 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 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 [2021-06-05 17:15:35,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:15:35,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:35,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:35,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:36,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479330047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:36,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:36,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:36,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433384239] [2021-06-05 17:15:36,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:36,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:36,016 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:36,636 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-06-05 17:15:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:36,988 INFO L225 Difference]: With dead ends: 89703 [2021-06-05 17:15:36,988 INFO L226 Difference]: Without dead ends: 89567 [2021-06-05 17:15:36,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-06-05 17:15:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-06-05 17:15:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-06-05 17:15:39,877 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-06-05 17:15:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:39,877 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-06-05 17:15:39,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-06-05 17:15:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:40,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:40,079 INFO L521 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] [2021-06-05 17:15:40,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:15:40,281 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-06-05 17:15:40,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:40,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504821377] [2021-06-05 17:15:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:40,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:40,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504821377] [2021-06-05 17:15:40,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504821377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696818971] [2021-06-05 17:15:40,360 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 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 [2021-06-05 17:15:40,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:15:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:40,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696818971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:40,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:40,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:40,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324605367] [2021-06-05 17:15:40,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:40,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:40,444 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:41,643 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-06-05 17:15:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:41,958 INFO L225 Difference]: With dead ends: 89056 [2021-06-05 17:15:41,958 INFO L226 Difference]: Without dead ends: 88940 [2021-06-05 17:15:41,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-06-05 17:15:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-06-05 17:15:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-06-05 17:15:44,808 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-06-05 17:15:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:44,808 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-06-05 17:15:44,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-06-05 17:15:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:45,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:45,006 INFO L521 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] [2021-06-05 17:15:45,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 17:15:45,206 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-06-05 17:15:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:45,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466621642] [2021-06-05 17:15:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:45,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:45,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466621642] [2021-06-05 17:15:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466621642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:45,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076687250] [2021-06-05 17:15:45,283 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 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 [2021-06-05 17:15:45,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:15:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076687250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:45,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:45,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:45,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077785929] [2021-06-05 17:15:45,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:45,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:45,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:45,352 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:45,985 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-06-05 17:15:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:46,941 INFO L225 Difference]: With dead ends: 88944 [2021-06-05 17:15:46,942 INFO L226 Difference]: Without dead ends: 88848 [2021-06-05 17:15:46,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-06-05 17:15:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-06-05 17:15:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-06-05 17:15:49,066 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-06-05 17:15:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:49,066 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-06-05 17:15:49,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-06-05 17:15:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:49,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:49,258 INFO L521 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] [2021-06-05 17:15:49,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 17:15:49,459 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:49,459 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-06-05 17:15:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:49,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73847622] [2021-06-05 17:15:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:49,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73847622] [2021-06-05 17:15:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73847622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063409333] [2021-06-05 17:15:49,517 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 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 [2021-06-05 17:15:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063409333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:49,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:49,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:49,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139115273] [2021-06-05 17:15:49,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:49,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:49,601 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:50,899 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-06-05 17:15:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:51,206 INFO L225 Difference]: With dead ends: 90259 [2021-06-05 17:15:51,206 INFO L226 Difference]: Without dead ends: 90123 [2021-06-05 17:15:51,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-06-05 17:15:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-06-05 17:15:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-06-05 17:15:54,058 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-06-05 17:15:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:54,058 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-06-05 17:15:54,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-06-05 17:15:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:54,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:54,247 INFO L521 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] [2021-06-05 17:15:54,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 17:15:54,448 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-06-05 17:15:54,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:54,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434438053] [2021-06-05 17:15:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:54,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:54,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434438053] [2021-06-05 17:15:54,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434438053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:54,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905718282] [2021-06-05 17:15:54,535 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 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 [2021-06-05 17:15:54,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:15:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:54,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905718282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:54,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:54,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380998242] [2021-06-05 17:15:54,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:54,618 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:15:55,767 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-06-05 17:15:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:15:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:15:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:15:56,173 INFO L225 Difference]: With dead ends: 89754 [2021-06-05 17:15:56,173 INFO L226 Difference]: Without dead ends: 89638 [2021-06-05 17:15:56,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-06-05 17:15:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-06-05 17:15:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-06-05 17:15:58,316 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-06-05 17:15:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:15:58,316 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-06-05 17:15:58,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:15:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-06-05 17:15:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:15:58,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:15:58,512 INFO L521 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] [2021-06-05 17:15:58,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 17:15:58,712 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:15:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:15:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-06-05 17:15:58,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:15:58,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267674376] [2021-06-05 17:15:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:15:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:15:59,239 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-06-05 17:15:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:15:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267674376] [2021-06-05 17:15:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267674376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993659267] [2021-06-05 17:15:59,280 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 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 [2021-06-05 17:15:59,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:15:59,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:15:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:15:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:15:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:15:59,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993659267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:15:59,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:15:59,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:15:59,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610959146] [2021-06-05 17:15:59,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:15:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:15:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:15:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:15:59,445 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:00,075 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-06-05 17:16:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:00,384 INFO L225 Difference]: With dead ends: 89966 [2021-06-05 17:16:00,384 INFO L226 Difference]: Without dead ends: 89870 [2021-06-05 17:16:00,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-06-05 17:16:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-06-05 17:16:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-06-05 17:16:03,091 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-06-05 17:16:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:03,091 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-06-05 17:16:03,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-06-05 17:16:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:03,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:03,280 INFO L521 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] [2021-06-05 17:16:03,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 17:16:03,481 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash 523034708, now seen corresponding path program 9 times [2021-06-05 17:16:03,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:03,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206403077] [2021-06-05 17:16:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:03,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206403077] [2021-06-05 17:16:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206403077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439803475] [2021-06-05 17:16:03,501 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 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 [2021-06-05 17:16:03,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:16:03,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:16:03,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:03,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439803475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:03,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:03,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 17:16:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900132181] [2021-06-05 17:16:03,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:16:03,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:16:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:16:03,572 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:16:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:04,845 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-06-05 17:16:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:16:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-05 17:16:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:05,241 INFO L225 Difference]: With dead ends: 97671 [2021-06-05 17:16:05,241 INFO L226 Difference]: Without dead ends: 97564 [2021-06-05 17:16:05,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:16:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-06-05 17:16:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-06-05 17:16:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-06-05 17:16:08,748 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-06-05 17:16:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:08,748 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-06-05 17:16:08,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:16:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-06-05 17:16:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:08,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:08,963 INFO L521 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] [2021-06-05 17:16:09,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:09,164 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-06-05 17:16:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:09,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794391042] [2021-06-05 17:16:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:09,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:09,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794391042] [2021-06-05 17:16:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794391042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:09,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557591656] [2021-06-05 17:16:09,240 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 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 [2021-06-05 17:16:09,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:16:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:09,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:16:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:09,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557591656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:09,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:09,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:16:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657568649] [2021-06-05 17:16:09,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:16:09,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:09,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:16:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:09,329 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:10,561 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-06-05 17:16:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:10,997 INFO L225 Difference]: With dead ends: 97830 [2021-06-05 17:16:10,997 INFO L226 Difference]: Without dead ends: 97714 [2021-06-05 17:16:10,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-06-05 17:16:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-06-05 17:16:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-06-05 17:16:13,962 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-06-05 17:16:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:13,962 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-06-05 17:16:13,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-06-05 17:16:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:14,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:14,257 INFO L521 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] [2021-06-05 17:16:14,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 17:16:14,457 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-06-05 17:16:14,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:14,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624007830] [2021-06-05 17:16:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:14,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:14,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624007830] [2021-06-05 17:16:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624007830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662502288] [2021-06-05 17:16:14,556 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 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 [2021-06-05 17:16:14,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:16:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:16:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662502288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:16:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098632776] [2021-06-05 17:16:14,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:16:14,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:16:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:14,634 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:15,268 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-06-05 17:16:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:16,188 INFO L225 Difference]: With dead ends: 98062 [2021-06-05 17:16:16,188 INFO L226 Difference]: Without dead ends: 97966 [2021-06-05 17:16:16,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-06-05 17:16:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-06-05 17:16:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-06-05 17:16:18,616 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-06-05 17:16:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:18,616 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-06-05 17:16:18,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-06-05 17:16:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:18,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:18,828 INFO L521 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] [2021-06-05 17:16:19,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:19,028 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-06-05 17:16:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:19,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720869108] [2021-06-05 17:16:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720869108] [2021-06-05 17:16:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720869108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651475592] [2021-06-05 17:16:19,083 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 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 [2021-06-05 17:16:19,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:16:19,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:16:19,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:16:19,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651475592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:19,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:19,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:16:19,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486969245] [2021-06-05 17:16:19,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:16:19,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:16:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:19,179 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:20,505 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-06-05 17:16:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:20,905 INFO L225 Difference]: With dead ends: 98621 [2021-06-05 17:16:20,905 INFO L226 Difference]: Without dead ends: 98525 [2021-06-05 17:16:20,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-06-05 17:16:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-06-05 17:16:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-06-05 17:16:23,937 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-06-05 17:16:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:23,937 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-06-05 17:16:23,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-06-05 17:16:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:24,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:24,149 INFO L521 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] [2021-06-05 17:16:24,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:24,350 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-06-05 17:16:24,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:24,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036822696] [2021-06-05 17:16:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:24,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036822696] [2021-06-05 17:16:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036822696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926551766] [2021-06-05 17:16:24,383 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 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 [2021-06-05 17:16:24,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:16:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:16:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:24,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926551766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:24,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:24,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 17:16:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596314797] [2021-06-05 17:16:24,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:16:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:16:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:16:24,473 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:16:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:25,893 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-06-05 17:16:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:16:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-05 17:16:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:26,305 INFO L225 Difference]: With dead ends: 107267 [2021-06-05 17:16:26,305 INFO L226 Difference]: Without dead ends: 107165 [2021-06-05 17:16:26,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:16:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-06-05 17:16:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-06-05 17:16:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-06-05 17:16:29,307 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-06-05 17:16:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:29,307 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-06-05 17:16:29,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:16:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-06-05 17:16:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:29,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:29,547 INFO L521 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] [2021-06-05 17:16:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:29,749 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-06-05 17:16:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:29,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676467937] [2021-06-05 17:16:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:29,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:29,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676467937] [2021-06-05 17:16:29,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676467937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:29,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626399693] [2021-06-05 17:16:29,790 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 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 [2021-06-05 17:16:29,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:16:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:16:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:29,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626399693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:29,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:29,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 17:16:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356478319] [2021-06-05 17:16:29,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:16:29,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:16:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:16:29,892 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 17:16:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:31,370 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-06-05 17:16:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:16:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-06-05 17:16:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:31,749 INFO L225 Difference]: With dead ends: 105665 [2021-06-05 17:16:31,750 INFO L226 Difference]: Without dead ends: 105515 [2021-06-05 17:16:31,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:16:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-06-05 17:16:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-06-05 17:16:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-06-05 17:16:34,747 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-06-05 17:16:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:34,747 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-06-05 17:16:34,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 17:16:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-06-05 17:16:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:34,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:34,970 INFO L521 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] [2021-06-05 17:16:35,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:35,179 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:35,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1313736820, now seen corresponding path program 12 times [2021-06-05 17:16:35,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:35,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544672946] [2021-06-05 17:16:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:35,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:35,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544672946] [2021-06-05 17:16:35,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544672946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:35,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741744974] [2021-06-05 17:16:35,205 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 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 [2021-06-05 17:16:35,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:16:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:35,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:16:35,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:35,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741744974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:35,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:35,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:16:35,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230861338] [2021-06-05 17:16:35,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:16:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:16:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:16:35,313 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 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) [2021-06-05 17:16:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:36,607 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-06-05 17:16:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:16:36,608 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 25 [2021-06-05 17:16:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:37,009 INFO L225 Difference]: With dead ends: 103952 [2021-06-05 17:16:37,009 INFO L226 Difference]: Without dead ends: 103908 [2021-06-05 17:16:37,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:16:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-06-05 17:16:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-06-05 17:16:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-06-05 17:16:40,026 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-06-05 17:16:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:40,026 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-06-05 17:16:40,026 INFO L483 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) [2021-06-05 17:16:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-06-05 17:16:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:40,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:40,254 INFO L521 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] [2021-06-05 17:16:40,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:16:40,454 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-06-05 17:16:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:40,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470352400] [2021-06-05 17:16:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:40,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:40,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470352400] [2021-06-05 17:16:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470352400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491538852] [2021-06-05 17:16:40,480 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 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 [2021-06-05 17:16:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:16:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491538852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:40,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:40,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 17:16:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886737007] [2021-06-05 17:16:40,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:16:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:16:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:16:40,597 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 17:16:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:41,998 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-06-05 17:16:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:16:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 25 [2021-06-05 17:16:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:42,437 INFO L225 Difference]: With dead ends: 122378 [2021-06-05 17:16:42,437 INFO L226 Difference]: Without dead ends: 120769 [2021-06-05 17:16:42,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:16:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-06-05 17:16:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-06-05 17:16:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-06-05 17:16:45,669 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-06-05 17:16:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:45,669 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-06-05 17:16:45,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 17:16:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-06-05 17:16:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:46,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:46,543 INFO L521 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] [2021-06-05 17:16:46,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 17:16:46,744 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-06-05 17:16:46,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:46,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696781483] [2021-06-05 17:16:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:46,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:46,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696781483] [2021-06-05 17:16:46,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696781483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:46,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538167010] [2021-06-05 17:16:46,774 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 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 [2021-06-05 17:16:46,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:16:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:16:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538167010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:46,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:46,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:16:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383258655] [2021-06-05 17:16:46,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:16:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:16:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:16:46,872 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:16:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:47,692 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-06-05 17:16:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:16:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-05 17:16:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:48,092 INFO L225 Difference]: With dead ends: 106739 [2021-06-05 17:16:48,092 INFO L226 Difference]: Without dead ends: 106655 [2021-06-05 17:16:48,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:16:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-06-05 17:16:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-06-05 17:16:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-06-05 17:16:51,213 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-06-05 17:16:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:51,213 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-06-05 17:16:51,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 17:16:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-06-05 17:16:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:52,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:52,019 INFO L521 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] [2021-06-05 17:16:52,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 17:16:52,253 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-06-05 17:16:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:52,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131149722] [2021-06-05 17:16:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:52,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:52,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131149722] [2021-06-05 17:16:52,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131149722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:52,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96730055] [2021-06-05 17:16:52,294 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 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 [2021-06-05 17:16:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:52,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:16:52,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:52,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96730055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:52,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:52,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:16:52,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289658364] [2021-06-05 17:16:52,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:16:52,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:16:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:52,351 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:53,066 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-06-05 17:16:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:53,468 INFO L225 Difference]: With dead ends: 105638 [2021-06-05 17:16:53,468 INFO L226 Difference]: Without dead ends: 105538 [2021-06-05 17:16:53,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-06-05 17:16:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-06-05 17:16:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-06-05 17:16:56,665 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-06-05 17:16:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:16:56,665 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-06-05 17:16:56,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-06-05 17:16:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:16:56,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:16:56,891 INFO L521 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] [2021-06-05 17:16:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 17:16:57,092 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:16:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:16:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-06-05 17:16:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:16:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552975532] [2021-06-05 17:16:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:16:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:16:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:57,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:16:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552975532] [2021-06-05 17:16:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552975532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832288163] [2021-06-05 17:16:57,148 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 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 [2021-06-05 17:16:57,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:16:57,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:16:57,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:16:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:16:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:16:57,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832288163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:16:57,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:16:57,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:16:57,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577608073] [2021-06-05 17:16:57,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:16:57,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:16:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:16:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:57,823 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:16:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:16:59,125 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-06-05 17:16:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:16:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:16:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:16:59,780 INFO L225 Difference]: With dead ends: 105993 [2021-06-05 17:16:59,781 INFO L226 Difference]: Without dead ends: 105893 [2021-06-05 17:16:59,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:16:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-06-05 17:17:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-06-05 17:17:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-06-05 17:17:03,203 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-06-05 17:17:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:03,203 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-06-05 17:17:03,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-06-05 17:17:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:03,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:03,439 INFO L521 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] [2021-06-05 17:17:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 17:17:03,649 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-06-05 17:17:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:03,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231909630] [2021-06-05 17:17:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:03,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:03,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231909630] [2021-06-05 17:17:03,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231909630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:03,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487982394] [2021-06-05 17:17:03,717 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 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 [2021-06-05 17:17:03,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:17:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:03,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487982394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:03,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:03,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:03,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038557732] [2021-06-05 17:17:03,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:03,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:03,789 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:05,026 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-06-05 17:17:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:05,511 INFO L225 Difference]: With dead ends: 104315 [2021-06-05 17:17:05,511 INFO L226 Difference]: Without dead ends: 104239 [2021-06-05 17:17:05,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-06-05 17:17:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-06-05 17:17:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-06-05 17:17:08,736 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-06-05 17:17:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:08,736 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-06-05 17:17:08,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-06-05 17:17:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:08,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:08,993 INFO L521 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] [2021-06-05 17:17:09,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 17:17:09,193 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-06-05 17:17:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:09,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860399097] [2021-06-05 17:17:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:09,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:09,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860399097] [2021-06-05 17:17:09,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860399097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:09,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729840979] [2021-06-05 17:17:09,252 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 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 [2021-06-05 17:17:09,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:17:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:09,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729840979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:09,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:09,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:09,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900603227] [2021-06-05 17:17:09,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:09,321 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:10,623 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-06-05 17:17:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:11,095 INFO L225 Difference]: With dead ends: 104856 [2021-06-05 17:17:11,095 INFO L226 Difference]: Without dead ends: 104768 [2021-06-05 17:17:11,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-06-05 17:17:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-06-05 17:17:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-06-05 17:17:14,234 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-06-05 17:17:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:14,235 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-06-05 17:17:14,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-06-05 17:17:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:14,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:14,496 INFO L521 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] [2021-06-05 17:17:14,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:14,697 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-06-05 17:17:14,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:14,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792250325] [2021-06-05 17:17:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:14,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:14,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792250325] [2021-06-05 17:17:14,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792250325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:14,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467678754] [2021-06-05 17:17:14,742 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 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 [2021-06-05 17:17:14,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:17:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467678754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:14,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:14,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:14,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476110232] [2021-06-05 17:17:14,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:14,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:14,804 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:15,518 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-06-05 17:17:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:16,519 INFO L225 Difference]: With dead ends: 105284 [2021-06-05 17:17:16,519 INFO L226 Difference]: Without dead ends: 105184 [2021-06-05 17:17:16,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-06-05 17:17:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-06-05 17:17:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-06-05 17:17:19,714 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-06-05 17:17:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:19,714 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-06-05 17:17:19,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-06-05 17:17:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:19,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:19,993 INFO L521 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, 1, 1] [2021-06-05 17:17:20,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:20,193 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-06-05 17:17:20,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:20,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041881294] [2021-06-05 17:17:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041881294] [2021-06-05 17:17:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041881294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84329556] [2021-06-05 17:17:20,216 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 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 [2021-06-05 17:17:20,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:17:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:17:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:20,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84329556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:20,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:20,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 17:17:20,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304875365] [2021-06-05 17:17:20,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:17:20,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:17:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:17:20,286 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:17:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:21,115 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-06-05 17:17:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:17:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-05 17:17:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:22,213 INFO L225 Difference]: With dead ends: 118688 [2021-06-05 17:17:22,213 INFO L226 Difference]: Without dead ends: 118688 [2021-06-05 17:17:22,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:17:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-06-05 17:17:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-06-05 17:17:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-06-05 17:17:25,396 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-06-05 17:17:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:25,397 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-06-05 17:17:25,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 17:17:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-06-05 17:17:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:25,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:25,639 INFO L521 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] [2021-06-05 17:17:25,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:25,840 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-06-05 17:17:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:25,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384148823] [2021-06-05 17:17:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:25,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:25,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384148823] [2021-06-05 17:17:25,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384148823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:25,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893684011] [2021-06-05 17:17:25,887 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 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 [2021-06-05 17:17:25,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:17:25,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:25,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893684011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:25,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:25,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:25,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622064381] [2021-06-05 17:17:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:25,960 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:27,229 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-06-05 17:17:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:27,719 INFO L225 Difference]: With dead ends: 108208 [2021-06-05 17:17:27,719 INFO L226 Difference]: Without dead ends: 108108 [2021-06-05 17:17:27,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-06-05 17:17:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-06-05 17:17:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-06-05 17:17:30,921 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-06-05 17:17:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:30,921 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-06-05 17:17:30,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-06-05 17:17:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:31,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:31,151 INFO L521 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] [2021-06-05 17:17:31,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:31,351 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:31,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-06-05 17:17:31,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:31,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318577266] [2021-06-05 17:17:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:31,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:31,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318577266] [2021-06-05 17:17:31,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318577266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:31,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009967074] [2021-06-05 17:17:31,420 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 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 [2021-06-05 17:17:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:31,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009967074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:31,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:31,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:31,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639560471] [2021-06-05 17:17:31,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:31,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:31,505 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:32,739 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-06-05 17:17:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:33,216 INFO L225 Difference]: With dead ends: 108139 [2021-06-05 17:17:33,216 INFO L226 Difference]: Without dead ends: 108063 [2021-06-05 17:17:33,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-06-05 17:17:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-06-05 17:17:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-06-05 17:17:36,357 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-06-05 17:17:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:36,357 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-06-05 17:17:36,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-06-05 17:17:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:36,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:36,565 INFO L521 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] [2021-06-05 17:17:36,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:36,765 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-06-05 17:17:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:36,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807123601] [2021-06-05 17:17:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:36,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807123601] [2021-06-05 17:17:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807123601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869861631] [2021-06-05 17:17:36,834 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 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 [2021-06-05 17:17:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:17:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:36,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:36,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869861631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:36,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:36,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:36,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127377352] [2021-06-05 17:17:36,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:36,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:36,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:36,909 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:38,170 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-06-05 17:17:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:38,584 INFO L225 Difference]: With dead ends: 107419 [2021-06-05 17:17:38,585 INFO L226 Difference]: Without dead ends: 107331 [2021-06-05 17:17:38,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-06-05 17:17:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-06-05 17:17:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-06-05 17:17:41,476 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-06-05 17:17:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:41,476 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-06-05 17:17:41,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-06-05 17:17:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:41,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:41,697 INFO L521 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] [2021-06-05 17:17:41,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 17:17:41,898 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:41,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-06-05 17:17:41,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:41,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531613457] [2021-06-05 17:17:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:41,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531613457] [2021-06-05 17:17:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531613457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984955576] [2021-06-05 17:17:41,944 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 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 [2021-06-05 17:17:41,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:17:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:41,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984955576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:42,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:42,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321242152] [2021-06-05 17:17:42,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:42,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:42,002 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:43,252 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-06-05 17:17:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:43,664 INFO L225 Difference]: With dead ends: 108226 [2021-06-05 17:17:43,664 INFO L226 Difference]: Without dead ends: 108150 [2021-06-05 17:17:43,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-06-05 17:17:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-06-05 17:17:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-06-05 17:17:46,634 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-06-05 17:17:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:46,634 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-06-05 17:17:46,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-06-05 17:17:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:46,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:46,866 INFO L521 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] [2021-06-05 17:17:47,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 17:17:47,069 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-06-05 17:17:47,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:47,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39779943] [2021-06-05 17:17:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:47,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39779943] [2021-06-05 17:17:47,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39779943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470427699] [2021-06-05 17:17:47,131 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:47,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:17:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470427699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:47,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:47,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891067625] [2021-06-05 17:17:47,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:47,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:47,192 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:48,464 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-06-05 17:17:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:48,875 INFO L225 Difference]: With dead ends: 107874 [2021-06-05 17:17:48,875 INFO L226 Difference]: Without dead ends: 107798 [2021-06-05 17:17:48,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-06-05 17:17:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-06-05 17:17:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-06-05 17:17:52,263 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-06-05 17:17:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-06-05 17:17:52,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-06-05 17:17:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:52,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:52,534 INFO L521 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] [2021-06-05 17:17:52,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:52,757 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-06-05 17:17:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:52,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584022502] [2021-06-05 17:17:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584022502] [2021-06-05 17:17:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584022502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474093078] [2021-06-05 17:17:53,334 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:53,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:17:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:17:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:17:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:17:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474093078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:53,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:53,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:17:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837489882] [2021-06-05 17:17:53,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:17:53,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:17:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:53,524 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:54,241 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-06-05 17:17:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:17:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:17:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:17:54,650 INFO L225 Difference]: With dead ends: 107237 [2021-06-05 17:17:54,650 INFO L226 Difference]: Without dead ends: 107149 [2021-06-05 17:17:54,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 576.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:17:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. [2021-06-05 17:17:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107149 to 105752. [2021-06-05 17:17:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105752 states, 105751 states have (on average 4.699946099800474) internal successors, (497024), 105751 states have internal predecessors, (497024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105752 states to 105752 states and 497024 transitions. [2021-06-05 17:17:57,691 INFO L78 Accepts]: Start accepts. Automaton has 105752 states and 497024 transitions. Word has length 25 [2021-06-05 17:17:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:17:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 105752 states and 497024 transitions. [2021-06-05 17:17:57,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 105752 states and 497024 transitions. [2021-06-05 17:17:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:17:58,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:17:58,477 INFO L521 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, 1, 1] [2021-06-05 17:17:58,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 17:17:58,693 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:17:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:17:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 19 times [2021-06-05 17:17:58,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:17:58,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562647953] [2021-06-05 17:17:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:17:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:58,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:17:58,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562647953] [2021-06-05 17:17:58,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562647953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:58,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103266151] [2021-06-05 17:17:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:17:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:17:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:17:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:17:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:17:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103266151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:17:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:17:58,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 17:17:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644477296] [2021-06-05 17:17:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:17:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:17:58,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:17:58,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:17:58,892 INFO L87 Difference]: Start difference. First operand 105752 states and 497024 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:17:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:17:59,886 INFO L93 Difference]: Finished difference Result 148546 states and 685984 transitions. [2021-06-05 17:17:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:17:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:17:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:01,118 INFO L225 Difference]: With dead ends: 148546 [2021-06-05 17:18:01,119 INFO L226 Difference]: Without dead ends: 147281 [2021-06-05 17:18:01,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:18:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147281 states. [2021-06-05 17:18:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147281 to 117058. [2021-06-05 17:18:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117058 states, 117057 states have (on average 4.7037169925762665) internal successors, (550603), 117057 states have internal predecessors, (550603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117058 states to 117058 states and 550603 transitions. [2021-06-05 17:18:04,514 INFO L78 Accepts]: Start accepts. Automaton has 117058 states and 550603 transitions. Word has length 25 [2021-06-05 17:18:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:04,514 INFO L482 AbstractCegarLoop]: Abstraction has 117058 states and 550603 transitions. [2021-06-05 17:18:04,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 117058 states and 550603 transitions. [2021-06-05 17:18:04,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:18:04,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:04,782 INFO L521 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, 1, 1] [2021-06-05 17:18:04,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:04,983 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 20 times [2021-06-05 17:18:04,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:04,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300260231] [2021-06-05 17:18:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:05,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300260231] [2021-06-05 17:18:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300260231] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:18:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:18:05,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 17:18:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94016556] [2021-06-05 17:18:05,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:18:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:18:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:18:05,003 INFO L87 Difference]: Start difference. First operand 117058 states and 550603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:06,588 INFO L93 Difference]: Finished difference Result 128713 states and 600066 transitions. [2021-06-05 17:18:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:18:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:18:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:07,060 INFO L225 Difference]: With dead ends: 128713 [2021-06-05 17:18:07,060 INFO L226 Difference]: Without dead ends: 128713 [2021-06-05 17:18:07,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:18:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128713 states. [2021-06-05 17:18:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128713 to 117168. [2021-06-05 17:18:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117168 states, 117167 states have (on average 4.7038500601705255) internal successors, (551136), 117167 states have internal predecessors, (551136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117168 states to 117168 states and 551136 transitions. [2021-06-05 17:18:10,988 INFO L78 Accepts]: Start accepts. Automaton has 117168 states and 551136 transitions. Word has length 25 [2021-06-05 17:18:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:10,988 INFO L482 AbstractCegarLoop]: Abstraction has 117168 states and 551136 transitions. [2021-06-05 17:18:10,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 117168 states and 551136 transitions. [2021-06-05 17:18:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:18:11,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:11,368 INFO L521 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] [2021-06-05 17:18:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-05 17:18:11,368 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-06-05 17:18:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755782767] [2021-06-05 17:18:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:11,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:11,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755782767] [2021-06-05 17:18:11,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755782767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:11,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747294879] [2021-06-05 17:18:11,417 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:11,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:18:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:18:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:11,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747294879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:11,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:11,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:18:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279573675] [2021-06-05 17:18:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:18:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:18:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:11,486 INFO L87 Difference]: Start difference. First operand 117168 states and 551136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:12,888 INFO L93 Difference]: Finished difference Result 119473 states and 560252 transitions. [2021-06-05 17:18:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:18:12,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:18:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:13,410 INFO L225 Difference]: With dead ends: 119473 [2021-06-05 17:18:13,410 INFO L226 Difference]: Without dead ends: 119373 [2021-06-05 17:18:13,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119373 states. [2021-06-05 17:18:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119373 to 117184. [2021-06-05 17:18:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117184 states, 117183 states have (on average 4.7040782366042855) internal successors, (551238), 117183 states have internal predecessors, (551238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117184 states to 117184 states and 551238 transitions. [2021-06-05 17:18:16,651 INFO L78 Accepts]: Start accepts. Automaton has 117184 states and 551238 transitions. Word has length 25 [2021-06-05 17:18:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:16,651 INFO L482 AbstractCegarLoop]: Abstraction has 117184 states and 551238 transitions. [2021-06-05 17:18:16,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 117184 states and 551238 transitions. [2021-06-05 17:18:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:18:16,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:16,900 INFO L521 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] [2021-06-05 17:18:17,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:17,101 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-06-05 17:18:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:17,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260838434] [2021-06-05 17:18:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:17,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260838434] [2021-06-05 17:18:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260838434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026352959] [2021-06-05 17:18:17,160 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:18:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026352959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:17,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:17,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:18:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680574233] [2021-06-05 17:18:17,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:18:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:18:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:17,224 INFO L87 Difference]: Start difference. First operand 117184 states and 551238 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:18,582 INFO L93 Difference]: Finished difference Result 118219 states and 555230 transitions. [2021-06-05 17:18:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:18:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:18:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:19,050 INFO L225 Difference]: With dead ends: 118219 [2021-06-05 17:18:19,050 INFO L226 Difference]: Without dead ends: 118143 [2021-06-05 17:18:19,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118143 states. [2021-06-05 17:18:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118143 to 117194. [2021-06-05 17:18:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117194 states, 117193 states have (on average 4.7041034874096574) internal successors, (551288), 117193 states have internal predecessors, (551288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117194 states to 117194 states and 551288 transitions. [2021-06-05 17:18:22,090 INFO L78 Accepts]: Start accepts. Automaton has 117194 states and 551288 transitions. Word has length 25 [2021-06-05 17:18:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:22,090 INFO L482 AbstractCegarLoop]: Abstraction has 117194 states and 551288 transitions. [2021-06-05 17:18:22,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 117194 states and 551288 transitions. [2021-06-05 17:18:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:18:23,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:23,068 INFO L521 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] [2021-06-05 17:18:23,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 17:18:23,268 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:23,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-06-05 17:18:23,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:23,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625488212] [2021-06-05 17:18:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:23,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625488212] [2021-06-05 17:18:23,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625488212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034759742] [2021-06-05 17:18:23,330 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:23,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:18:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:18:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:23,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034759742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:23,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:23,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:18:23,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942142605] [2021-06-05 17:18:23,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:18:23,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:18:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:23,397 INFO L87 Difference]: Start difference. First operand 117194 states and 551288 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:24,170 INFO L93 Difference]: Finished difference Result 118548 states and 556592 transitions. [2021-06-05 17:18:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:18:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:18:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:24,613 INFO L225 Difference]: With dead ends: 118548 [2021-06-05 17:18:24,613 INFO L226 Difference]: Without dead ends: 118460 [2021-06-05 17:18:24,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118460 states. [2021-06-05 17:18:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118460 to 117198. [2021-06-05 17:18:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117198 states, 117197 states have (on average 4.70423304350794) internal successors, (551322), 117197 states have internal predecessors, (551322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117198 states to 117198 states and 551322 transitions. [2021-06-05 17:18:28,581 INFO L78 Accepts]: Start accepts. Automaton has 117198 states and 551322 transitions. Word has length 25 [2021-06-05 17:18:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:28,581 INFO L482 AbstractCegarLoop]: Abstraction has 117198 states and 551322 transitions. [2021-06-05 17:18:28,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 117198 states and 551322 transitions. [2021-06-05 17:18:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:18:28,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:28,878 INFO L521 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] [2021-06-05 17:18:29,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:29,093 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-06-05 17:18:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:29,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732542926] [2021-06-05 17:18:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:29,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:29,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732542926] [2021-06-05 17:18:29,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732542926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881937963] [2021-06-05 17:18:29,130 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:29,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:18:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:18:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:18:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881937963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:29,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:29,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:18:29,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321813478] [2021-06-05 17:18:29,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:18:29,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:18:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:29,188 INFO L87 Difference]: Start difference. First operand 117198 states and 551322 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:30,621 INFO L93 Difference]: Finished difference Result 118753 states and 557336 transitions. [2021-06-05 17:18:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:18:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 17:18:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:31,082 INFO L225 Difference]: With dead ends: 118753 [2021-06-05 17:18:31,082 INFO L226 Difference]: Without dead ends: 118653 [2021-06-05 17:18:31,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:18:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118653 states. [2021-06-05 17:18:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118653 to 117200. [2021-06-05 17:18:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117200 states, 117199 states have (on average 4.704528195633069) internal successors, (551366), 117199 states have internal predecessors, (551366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117200 states to 117200 states and 551366 transitions. [2021-06-05 17:18:34,268 INFO L78 Accepts]: Start accepts. Automaton has 117200 states and 551366 transitions. Word has length 25 [2021-06-05 17:18:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 117200 states and 551366 transitions. [2021-06-05 17:18:34,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 117200 states and 551366 transitions. [2021-06-05 17:18:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:18:34,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:34,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:18:34,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:34,748 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash -166258994, now seen corresponding path program 19 times [2021-06-05 17:18:34,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:34,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356133303] [2021-06-05 17:18:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:34,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356133303] [2021-06-05 17:18:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356133303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014357305] [2021-06-05 17:18:34,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:18:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014357305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:34,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:34,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:18:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404498617] [2021-06-05 17:18:34,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:18:34,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:18:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:18:34,874 INFO L87 Difference]: Start difference. First operand 117200 states and 551366 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:37,134 INFO L93 Difference]: Finished difference Result 147548 states and 688527 transitions. [2021-06-05 17:18:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:18:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:18:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:38,062 INFO L225 Difference]: With dead ends: 147548 [2021-06-05 17:18:38,063 INFO L226 Difference]: Without dead ends: 146423 [2021-06-05 17:18:38,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:18:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146423 states. [2021-06-05 17:18:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146423 to 133054. [2021-06-05 17:18:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133054 states, 133053 states have (on average 4.703276138080314) internal successors, (625785), 133053 states have internal predecessors, (625785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133054 states to 133054 states and 625785 transitions. [2021-06-05 17:18:42,469 INFO L78 Accepts]: Start accepts. Automaton has 133054 states and 625785 transitions. Word has length 27 [2021-06-05 17:18:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:42,470 INFO L482 AbstractCegarLoop]: Abstraction has 133054 states and 625785 transitions. [2021-06-05 17:18:42,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 133054 states and 625785 transitions. [2021-06-05 17:18:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:18:42,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:42,782 INFO L521 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, 1, 1] [2021-06-05 17:18:42,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 17:18:42,982 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash 932861774, now seen corresponding path program 21 times [2021-06-05 17:18:42,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:42,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001908467] [2021-06-05 17:18:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:43,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:43,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001908467] [2021-06-05 17:18:43,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001908467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:43,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101621856] [2021-06-05 17:18:43,023 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:43,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:18:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:18:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:43,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101621856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:43,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:43,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:18:43,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494654317] [2021-06-05 17:18:43,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:18:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:18:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:18:43,100 INFO L87 Difference]: Start difference. First operand 133054 states and 625785 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:44,775 INFO L93 Difference]: Finished difference Result 144228 states and 674583 transitions. [2021-06-05 17:18:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:18:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:18:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:45,338 INFO L225 Difference]: With dead ends: 144228 [2021-06-05 17:18:45,338 INFO L226 Difference]: Without dead ends: 144058 [2021-06-05 17:18:45,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:18:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144058 states. [2021-06-05 17:18:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144058 to 121212. [2021-06-05 17:18:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121212 states, 121211 states have (on average 4.70567852752638) internal successors, (570380), 121211 states have internal predecessors, (570380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121212 states to 121212 states and 570380 transitions. [2021-06-05 17:18:49,430 INFO L78 Accepts]: Start accepts. Automaton has 121212 states and 570380 transitions. Word has length 27 [2021-06-05 17:18:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:49,430 INFO L482 AbstractCegarLoop]: Abstraction has 121212 states and 570380 transitions. [2021-06-05 17:18:49,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 121212 states and 570380 transitions. [2021-06-05 17:18:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:18:49,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:49,731 INFO L521 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, 1, 1] [2021-06-05 17:18:49,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 17:18:49,932 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash -184507126, now seen corresponding path program 22 times [2021-06-05 17:18:49,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:49,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037745871] [2021-06-05 17:18:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:49,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:49,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037745871] [2021-06-05 17:18:49,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037745871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:49,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359383513] [2021-06-05 17:18:49,966 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:49,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:18:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:18:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:50,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359383513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:50,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:50,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:18:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207574147] [2021-06-05 17:18:50,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:18:50,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:18:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:18:50,065 INFO L87 Difference]: Start difference. First operand 121212 states and 570380 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:51,641 INFO L93 Difference]: Finished difference Result 142703 states and 667037 transitions. [2021-06-05 17:18:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:18:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:18:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:52,227 INFO L225 Difference]: With dead ends: 142703 [2021-06-05 17:18:52,227 INFO L226 Difference]: Without dead ends: 142461 [2021-06-05 17:18:52,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:18:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142461 states. [2021-06-05 17:18:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142461 to 121815. [2021-06-05 17:18:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121815 states, 121814 states have (on average 4.707701906184839) internal successors, (573464), 121814 states have internal predecessors, (573464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121815 states to 121815 states and 573464 transitions. [2021-06-05 17:18:56,148 INFO L78 Accepts]: Start accepts. Automaton has 121815 states and 573464 transitions. Word has length 27 [2021-06-05 17:18:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:18:56,148 INFO L482 AbstractCegarLoop]: Abstraction has 121815 states and 573464 transitions. [2021-06-05 17:18:56,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 121815 states and 573464 transitions. [2021-06-05 17:18:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:18:56,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:18:56,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:18:56,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 17:18:56,736 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:18:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:18:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 625965006, now seen corresponding path program 9 times [2021-06-05 17:18:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:18:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848344101] [2021-06-05 17:18:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:18:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:18:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:18:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848344101] [2021-06-05 17:18:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848344101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223901135] [2021-06-05 17:18:56,797 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:18:56,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:18:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:18:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:18:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:18:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:18:56,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223901135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:18:56,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:18:56,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 17:18:56,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073912248] [2021-06-05 17:18:56,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:18:56,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:18:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:18:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:18:56,880 INFO L87 Difference]: Start difference. First operand 121815 states and 573464 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:18:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:18:58,505 INFO L93 Difference]: Finished difference Result 123705 states and 580618 transitions. [2021-06-05 17:18:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:18:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:18:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:18:58,995 INFO L225 Difference]: With dead ends: 123705 [2021-06-05 17:18:58,995 INFO L226 Difference]: Without dead ends: 123623 [2021-06-05 17:18:58,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:18:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123623 states. [2021-06-05 17:19:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123623 to 121965. [2021-06-05 17:19:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121965 states, 121964 states have (on average 4.707438260470303) internal successors, (574138), 121964 states have internal predecessors, (574138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121965 states to 121965 states and 574138 transitions. [2021-06-05 17:19:02,189 INFO L78 Accepts]: Start accepts. Automaton has 121965 states and 574138 transitions. Word has length 27 [2021-06-05 17:19:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:02,190 INFO L482 AbstractCegarLoop]: Abstraction has 121965 states and 574138 transitions. [2021-06-05 17:19:02,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 121965 states and 574138 transitions. [2021-06-05 17:19:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:02,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:02,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:19:03,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:03,277 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-06-05 17:19:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:03,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731477221] [2021-06-05 17:19:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:03,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731477221] [2021-06-05 17:19:03,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731477221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104848548] [2021-06-05 17:19:03,343 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:03,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:19:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:19:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:03,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104848548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:03,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:03,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 17:19:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836720572] [2021-06-05 17:19:03,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:19:03,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:19:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:19:03,416 INFO L87 Difference]: Start difference. First operand 121965 states and 574138 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:04,204 INFO L93 Difference]: Finished difference Result 122799 states and 577229 transitions. [2021-06-05 17:19:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:19:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:19:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:04,641 INFO L225 Difference]: With dead ends: 122799 [2021-06-05 17:19:04,641 INFO L226 Difference]: Without dead ends: 122717 [2021-06-05 17:19:04,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:19:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122717 states. [2021-06-05 17:19:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122717 to 121999. [2021-06-05 17:19:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121999 states, 121998 states have (on average 4.707495204839423) internal successors, (574305), 121998 states have internal predecessors, (574305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121999 states to 121999 states and 574305 transitions. [2021-06-05 17:19:08,625 INFO L78 Accepts]: Start accepts. Automaton has 121999 states and 574305 transitions. Word has length 27 [2021-06-05 17:19:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:08,625 INFO L482 AbstractCegarLoop]: Abstraction has 121999 states and 574305 transitions. [2021-06-05 17:19:08,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 121999 states and 574305 transitions. [2021-06-05 17:19:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:08,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:08,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:19:09,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 17:19:09,124 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1359658504, now seen corresponding path program 11 times [2021-06-05 17:19:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:09,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339392397] [2021-06-05 17:19:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:19:09,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339392397] [2021-06-05 17:19:09,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339392397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283538241] [2021-06-05 17:19:09,190 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:09,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:19:09,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:19:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:19:09,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283538241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:09,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:09,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 17:19:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785090427] [2021-06-05 17:19:09,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:19:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:19:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:19:09,265 INFO L87 Difference]: Start difference. First operand 121999 states and 574305 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:10,709 INFO L93 Difference]: Finished difference Result 123187 states and 578845 transitions. [2021-06-05 17:19:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:19:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:19:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:11,214 INFO L225 Difference]: With dead ends: 123187 [2021-06-05 17:19:11,214 INFO L226 Difference]: Without dead ends: 123123 [2021-06-05 17:19:11,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:19:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2021-06-05 17:19:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 122035. [2021-06-05 17:19:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122035 states, 122034 states have (on average 4.707663438058246) internal successors, (574495), 122034 states have internal predecessors, (574495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122035 states to 122035 states and 574495 transitions. [2021-06-05 17:19:14,367 INFO L78 Accepts]: Start accepts. Automaton has 122035 states and 574495 transitions. Word has length 27 [2021-06-05 17:19:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:14,367 INFO L482 AbstractCegarLoop]: Abstraction has 122035 states and 574495 transitions. [2021-06-05 17:19:14,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 122035 states and 574495 transitions. [2021-06-05 17:19:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:15,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:15,331 INFO L521 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, 1, 1] [2021-06-05 17:19:15,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 17:19:15,553 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1606692178, now seen corresponding path program 1 times [2021-06-05 17:19:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576744835] [2021-06-05 17:19:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576744835] [2021-06-05 17:19:15,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576744835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290664144] [2021-06-05 17:19:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:19:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:15,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290664144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:15,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:15,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 17:19:15,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709951624] [2021-06-05 17:19:15,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:19:15,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:19:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:19:15,661 INFO L87 Difference]: Start difference. First operand 122035 states and 574495 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-06-05 17:19:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:17,333 INFO L93 Difference]: Finished difference Result 155104 states and 720964 transitions. [2021-06-05 17:19:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:19:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 27 [2021-06-05 17:19:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:17,974 INFO L225 Difference]: With dead ends: 155104 [2021-06-05 17:19:17,974 INFO L226 Difference]: Without dead ends: 154336 [2021-06-05 17:19:17,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:19:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154336 states. [2021-06-05 17:19:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154336 to 143896. [2021-06-05 17:19:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143896 states, 143895 states have (on average 4.698724764585288) internal successors, (676123), 143895 states have internal predecessors, (676123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143896 states to 143896 states and 676123 transitions. [2021-06-05 17:19:22,561 INFO L78 Accepts]: Start accepts. Automaton has 143896 states and 676123 transitions. Word has length 27 [2021-06-05 17:19:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:22,561 INFO L482 AbstractCegarLoop]: Abstraction has 143896 states and 676123 transitions. [2021-06-05 17:19:22,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-06-05 17:19:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 143896 states and 676123 transitions. [2021-06-05 17:19:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:22,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:22,958 INFO L521 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, 1, 1] [2021-06-05 17:19:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:23,161 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2057426258, now seen corresponding path program 2 times [2021-06-05 17:19:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254671035] [2021-06-05 17:19:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:23,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:23,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254671035] [2021-06-05 17:19:23,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254671035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:23,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154306451] [2021-06-05 17:19:23,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:19:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:19:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154306451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:23,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:23,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 17:19:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107764900] [2021-06-05 17:19:23,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:19:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:19:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:19:23,289 INFO L87 Difference]: Start difference. First operand 143896 states and 676123 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 17:19:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:25,715 INFO L93 Difference]: Finished difference Result 192044 states and 890559 transitions. [2021-06-05 17:19:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:19:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 27 [2021-06-05 17:19:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:26,952 INFO L225 Difference]: With dead ends: 192044 [2021-06-05 17:19:26,953 INFO L226 Difference]: Without dead ends: 190887 [2021-06-05 17:19:26,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:19:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190887 states. [2021-06-05 17:19:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190887 to 168910. [2021-06-05 17:19:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168910 states, 168909 states have (on average 4.692899727071974) internal successors, (792673), 168909 states have internal predecessors, (792673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168910 states to 168910 states and 792673 transitions. [2021-06-05 17:19:32,796 INFO L78 Accepts]: Start accepts. Automaton has 168910 states and 792673 transitions. Word has length 27 [2021-06-05 17:19:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:32,796 INFO L482 AbstractCegarLoop]: Abstraction has 168910 states and 792673 transitions. [2021-06-05 17:19:32,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-06-05 17:19:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 168910 states and 792673 transitions. [2021-06-05 17:19:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:33,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:33,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:19:33,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:33,450 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1077781872, now seen corresponding path program 20 times [2021-06-05 17:19:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:33,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453549824] [2021-06-05 17:19:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:33,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:33,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453549824] [2021-06-05 17:19:33,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453549824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:33,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023210109] [2021-06-05 17:19:33,502 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:33,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:19:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:33,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:19:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:33,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023210109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:33,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:33,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:19:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150963012] [2021-06-05 17:19:33,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:19:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:19:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:19:33,639 INFO L87 Difference]: Start difference. First operand 168910 states and 792673 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-05 17:19:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:35,699 INFO L93 Difference]: Finished difference Result 184550 states and 860326 transitions. [2021-06-05 17:19:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:19:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 27 [2021-06-05 17:19:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:36,482 INFO L225 Difference]: With dead ends: 184550 [2021-06-05 17:19:36,482 INFO L226 Difference]: Without dead ends: 184501 [2021-06-05 17:19:36,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:19:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184501 states. [2021-06-05 17:19:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184501 to 169053. [2021-06-05 17:19:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169053 states, 169052 states have (on average 4.692006009985094) internal successors, (793193), 169052 states have internal predecessors, (793193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169053 states to 169053 states and 793193 transitions. [2021-06-05 17:19:42,291 INFO L78 Accepts]: Start accepts. Automaton has 169053 states and 793193 transitions. Word has length 27 [2021-06-05 17:19:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:42,291 INFO L482 AbstractCegarLoop]: Abstraction has 169053 states and 793193 transitions. [2021-06-05 17:19:42,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-05 17:19:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 169053 states and 793193 transitions. [2021-06-05 17:19:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:43,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:43,446 INFO L521 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, 1, 1] [2021-06-05 17:19:43,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:43,661 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1048149518, now seen corresponding path program 3 times [2021-06-05 17:19:43,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212126327] [2021-06-05 17:19:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:43,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212126327] [2021-06-05 17:19:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212126327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092698744] [2021-06-05 17:19:43,689 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:43,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:19:43,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:19:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:43,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092698744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:43,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:43,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 17:19:43,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180355224] [2021-06-05 17:19:43,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:19:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:19:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:19:43,780 INFO L87 Difference]: Start difference. First operand 169053 states and 793193 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:45,873 INFO L93 Difference]: Finished difference Result 230190 states and 1066278 transitions. [2021-06-05 17:19:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:19:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:19:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:46,822 INFO L225 Difference]: With dead ends: 230190 [2021-06-05 17:19:46,822 INFO L226 Difference]: Without dead ends: 228007 [2021-06-05 17:19:46,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:19:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228007 states. [2021-06-05 17:19:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228007 to 157964. [2021-06-05 17:19:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157964 states, 157963 states have (on average 4.688616954603293) internal successors, (740628), 157963 states have internal predecessors, (740628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157964 states to 157964 states and 740628 transitions. [2021-06-05 17:19:52,685 INFO L78 Accepts]: Start accepts. Automaton has 157964 states and 740628 transitions. Word has length 27 [2021-06-05 17:19:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:19:52,685 INFO L482 AbstractCegarLoop]: Abstraction has 157964 states and 740628 transitions. [2021-06-05 17:19:52,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:19:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 157964 states and 740628 transitions. [2021-06-05 17:19:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:19:53,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:19:53,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:19:53,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:53,317 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:19:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:19:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1446762584, now seen corresponding path program 21 times [2021-06-05 17:19:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:19:53,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009042423] [2021-06-05 17:19:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:19:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:19:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:53,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:19:53,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009042423] [2021-06-05 17:19:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009042423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:53,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131853327] [2021-06-05 17:19:53,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:19:53,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:19:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:19:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:19:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:19:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:19:53,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131853327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:19:53,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:19:53,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:19:53,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212843365] [2021-06-05 17:19:53,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:19:53,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:19:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:19:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:19:53,466 INFO L87 Difference]: Start difference. First operand 157964 states and 740628 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 17:19:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:19:55,480 INFO L93 Difference]: Finished difference Result 173681 states and 808144 transitions. [2021-06-05 17:19:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:19:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 27 [2021-06-05 17:19:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:19:56,151 INFO L225 Difference]: With dead ends: 173681 [2021-06-05 17:19:56,151 INFO L226 Difference]: Without dead ends: 173615 [2021-06-05 17:19:56,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:19:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173615 states. [2021-06-05 17:19:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173615 to 158249. [2021-06-05 17:20:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158249 states, 158248 states have (on average 4.688217228653759) internal successors, (741901), 158248 states have internal predecessors, (741901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158249 states to 158249 states and 741901 transitions. [2021-06-05 17:20:01,551 INFO L78 Accepts]: Start accepts. Automaton has 158249 states and 741901 transitions. Word has length 27 [2021-06-05 17:20:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:20:01,552 INFO L482 AbstractCegarLoop]: Abstraction has 158249 states and 741901 transitions. [2021-06-05 17:20:01,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-06-05 17:20:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 158249 states and 741901 transitions. [2021-06-05 17:20:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:20:01,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:20:01,983 INFO L521 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, 1, 1, 1, 1] [2021-06-05 17:20:02,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 17:20:02,183 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:20:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:20:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1299795410, now seen corresponding path program 1 times [2021-06-05 17:20:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:20:02,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900317204] [2021-06-05 17:20:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:20:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:02,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:20:02,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900317204] [2021-06-05 17:20:02,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900317204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:02,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799580850] [2021-06-05 17:20:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:20:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:20:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799580850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:02,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:20:02,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 17:20:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226337187] [2021-06-05 17:20:02,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:20:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:20:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:20:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:02,339 INFO L87 Difference]: Start difference. First operand 158249 states and 741901 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:20:04,284 INFO L93 Difference]: Finished difference Result 160685 states and 751012 transitions. [2021-06-05 17:20:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:20:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:20:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:20:04,961 INFO L225 Difference]: With dead ends: 160685 [2021-06-05 17:20:04,961 INFO L226 Difference]: Without dead ends: 160585 [2021-06-05 17:20:04,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160585 states. [2021-06-05 17:20:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160585 to 158284. [2021-06-05 17:20:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158284 states, 158283 states have (on average 4.688456751514692) internal successors, (742103), 158283 states have internal predecessors, (742103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158284 states to 158284 states and 742103 transitions. [2021-06-05 17:20:10,494 INFO L78 Accepts]: Start accepts. Automaton has 158284 states and 742103 transitions. Word has length 27 [2021-06-05 17:20:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:20:10,495 INFO L482 AbstractCegarLoop]: Abstraction has 158284 states and 742103 transitions. [2021-06-05 17:20:10,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 158284 states and 742103 transitions. [2021-06-05 17:20:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:20:10,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:20:10,926 INFO L521 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, 1, 1, 1, 1] [2021-06-05 17:20:11,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 17:20:11,126 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:20:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:20:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2127368078, now seen corresponding path program 2 times [2021-06-05 17:20:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:20:11,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221109569] [2021-06-05 17:20:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:20:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:11,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:20:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221109569] [2021-06-05 17:20:11,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221109569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838800242] [2021-06-05 17:20:11,231 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:11,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:20:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:20:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:20:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:20:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:11,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838800242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:11,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:20:11,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 17:20:11,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104600074] [2021-06-05 17:20:11,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:20:11,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:20:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:20:11,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:11,306 INFO L87 Difference]: Start difference. First operand 158284 states and 742103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:20:13,068 INFO L93 Difference]: Finished difference Result 161393 states and 754186 transitions. [2021-06-05 17:20:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:20:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:20:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:20:14,448 INFO L225 Difference]: With dead ends: 161393 [2021-06-05 17:20:14,448 INFO L226 Difference]: Without dead ends: 161317 [2021-06-05 17:20:14,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161317 states. [2021-06-05 17:20:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161317 to 158335. [2021-06-05 17:20:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158335 states, 158334 states have (on average 4.688613942678136) internal successors, (742367), 158334 states have internal predecessors, (742367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158335 states to 158335 states and 742367 transitions. [2021-06-05 17:20:20,166 INFO L78 Accepts]: Start accepts. Automaton has 158335 states and 742367 transitions. Word has length 27 [2021-06-05 17:20:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:20:20,166 INFO L482 AbstractCegarLoop]: Abstraction has 158335 states and 742367 transitions. [2021-06-05 17:20:20,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 158335 states and 742367 transitions. [2021-06-05 17:20:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:20:20,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:20:20,593 INFO L521 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, 1, 1, 1, 1] [2021-06-05 17:20:20,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 17:20:20,794 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:20:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:20:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash -418499338, now seen corresponding path program 3 times [2021-06-05 17:20:20,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:20:20,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011340767] [2021-06-05 17:20:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:20:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:20,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:20:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011340767] [2021-06-05 17:20:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011340767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838224085] [2021-06-05 17:20:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:20,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:20:20,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:20:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:20:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:20:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:20,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838224085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:20,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:20:20,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 17:20:20,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990535801] [2021-06-05 17:20:20,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:20:20,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:20:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:20:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:20,951 INFO L87 Difference]: Start difference. First operand 158335 states and 742367 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:20:22,786 INFO L93 Difference]: Finished difference Result 160525 states and 750588 transitions. [2021-06-05 17:20:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:20:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:20:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:20:23,461 INFO L225 Difference]: With dead ends: 160525 [2021-06-05 17:20:23,461 INFO L226 Difference]: Without dead ends: 160437 [2021-06-05 17:20:23,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160437 states. [2021-06-05 17:20:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160437 to 158356. [2021-06-05 17:20:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158356 states, 158355 states have (on average 4.688806794859651) internal successors, (742496), 158355 states have internal predecessors, (742496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158356 states to 158356 states and 742496 transitions. [2021-06-05 17:20:28,935 INFO L78 Accepts]: Start accepts. Automaton has 158356 states and 742496 transitions. Word has length 27 [2021-06-05 17:20:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:20:28,935 INFO L482 AbstractCegarLoop]: Abstraction has 158356 states and 742496 transitions. [2021-06-05 17:20:28,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 158356 states and 742496 transitions. [2021-06-05 17:20:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:20:29,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:20:29,375 INFO L521 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, 1, 1, 1, 1] [2021-06-05 17:20:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 17:20:29,576 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:20:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:20:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1918328274, now seen corresponding path program 4 times [2021-06-05 17:20:29,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:20:29,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679639504] [2021-06-05 17:20:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:20:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:29,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:20:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679639504] [2021-06-05 17:20:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679639504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882512687] [2021-06-05 17:20:29,644 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:29,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:20:29,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:20:29,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:20:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:20:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882512687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:29,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:20:29,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 17:20:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321037445] [2021-06-05 17:20:29,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:20:29,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:20:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:20:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:20:29,759 INFO L87 Difference]: Start difference. First operand 158356 states and 742496 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:20:31,512 INFO L93 Difference]: Finished difference Result 163254 states and 762103 transitions. [2021-06-05 17:20:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:20:31,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:20:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:20:32,198 INFO L225 Difference]: With dead ends: 163254 [2021-06-05 17:20:32,199 INFO L226 Difference]: Without dead ends: 163178 [2021-06-05 17:20:32,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:20:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163178 states. [2021-06-05 17:20:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163178 to 158476. [2021-06-05 17:20:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158476 states, 158475 states have (on average 4.689004574854078) internal successors, (743090), 158475 states have internal predecessors, (743090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158476 states to 158476 states and 743090 transitions. [2021-06-05 17:20:37,056 INFO L78 Accepts]: Start accepts. Automaton has 158476 states and 743090 transitions. Word has length 27 [2021-06-05 17:20:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:20:37,057 INFO L482 AbstractCegarLoop]: Abstraction has 158476 states and 743090 transitions. [2021-06-05 17:20:37,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 158476 states and 743090 transitions. [2021-06-05 17:20:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:20:38,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:20:38,290 INFO L521 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, 1, 1, 1, 1] [2021-06-05 17:20:38,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 17:20:38,490 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:20:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:20:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash 574596134, now seen corresponding path program 5 times [2021-06-05 17:20:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:20:38,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323177685] [2021-06-05 17:20:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:20:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:20:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:38,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:20:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323177685] [2021-06-05 17:20:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323177685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:38,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23921354] [2021-06-05 17:20:38,583 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:38,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:20:38,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:20:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 17:20:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:20:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:20:38,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23921354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:20:38,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:20:38,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 17:20:38,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866278995] [2021-06-05 17:20:38,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:20:38,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:20:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:20:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:38,654 INFO L87 Difference]: Start difference. First operand 158476 states and 743090 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:20:40,353 INFO L93 Difference]: Finished difference Result 163798 states and 764346 transitions. [2021-06-05 17:20:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:20:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:20:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:20:41,010 INFO L225 Difference]: With dead ends: 163798 [2021-06-05 17:20:41,010 INFO L226 Difference]: Without dead ends: 163722 [2021-06-05 17:20:41,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:20:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163722 states. Received shutdown request... [2021-06-05 17:20:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163722 to 158493. [2021-06-05 17:20:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158493 states, 158492 states have (on average 4.688968528379982) internal successors, (743164), 158492 states have internal predecessors, (743164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:20:45,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:20:45,397 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:20:45,398 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:20:45,400 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:20:45,400 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:20:45 BasicIcfg [2021-06-05 17:20:45,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:20:45,400 INFO L168 Benchmark]: Toolchain (without parser) took 632040.83 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.7 MB in the beginning and 10.6 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.1 GB. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 356.5 MB. Free memory was 336.8 MB in the beginning and 336.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 356.5 MB. Free memory was 335.6 MB in the beginning and 334.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 INFO L168 Benchmark]: Boogie Preprocessor took 24.14 ms. Allocated memory is still 356.5 MB. Free memory was 334.1 MB in the beginning and 333.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 INFO L168 Benchmark]: RCFGBuilder took 272.97 ms. Allocated memory is still 356.5 MB. Free memory was 333.0 MB in the beginning and 319.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 INFO L168 Benchmark]: TraceAbstraction took 631716.03 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 319.2 MB in the beginning and 10.6 GB in the end (delta: -10.3 GB). Peak memory consumption was 6.1 GB. Max. memory is 16.0 GB. [2021-06-05 17:20:45,401 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 0.15 ms. Allocated memory is still 356.5 MB. Free memory was 336.8 MB in the beginning and 336.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 356.5 MB. Free memory was 335.6 MB in the beginning and 334.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.14 ms. Allocated memory is still 356.5 MB. Free memory was 334.1 MB in the beginning and 333.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 272.97 ms. Allocated memory is still 356.5 MB. Free memory was 333.0 MB in the beginning and 319.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 631716.03 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 319.2 MB in the beginning and 10.6 GB in the end (delta: -10.3 GB). Peak memory consumption was 6.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 631625.1ms, OverallIterations: 122, TraceHistogramMax: 3, EmptinessCheckTime: 36010.8ms, AutomataDifference: 199146.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 108.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6421 SDtfs, 13327 SDslu, 22764 SDs, 0 SdLazy, 23628 SolverSat, 4013 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12815.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3930 GetRequests, 2425 SyntacticMatches, 263 SemanticMatches, 1242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 13450.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1345, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 350977.1ms AutomataMinimizationTime, 122 MinimizatonAttempts, 1536178 StatesRemovedByMinimization, 121 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 704.0ms SsaConstructionTime, 1318.3ms SatisfiabilityAnalysisTime, 15908.1ms InterpolantComputationTime, 5856 NumberOfCodeBlocks, 5851 NumberOfCodeBlocksAsserted, 341 NumberOfCheckSat, 5620 ConstructedInterpolants, 0 QuantifiedInterpolants, 25843 SizeOfPredicates, 124 NumberOfNonLiveVariables, 8056 ConjunctsInSsa, 1155 ConjunctsInUnsatCore, 236 InterpolantComputations, 10 PerfectInterpolantSequences, 231/920 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