/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:44:35,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:44:35,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:44:35,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:44:35,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:44:35,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:44:35,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:44:35,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:44:35,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:44:35,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:44:36,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:44:36,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:44:36,000 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:44:36,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:44:36,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:44:36,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:44:36,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:44:36,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:44:36,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:44:36,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:44:36,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:44:36,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:44:36,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:44:36,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:44:36,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:44:36,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:44:36,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:44:36,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:44:36,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:44:36,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:44:36,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:44:36,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:44:36,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:44:36,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:44:36,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:44:36,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:44:36,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:44:36,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:44:36,462 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:44:36,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-2.c [2020-12-22 04:44:36,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffbffa5ed/e186c7dea4794150a8bef5579acebfdd/FLAG55245c316 [2020-12-22 04:44:37,239 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:44:37,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-2.c [2020-12-22 04:44:37,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffbffa5ed/e186c7dea4794150a8bef5579acebfdd/FLAG55245c316 [2020-12-22 04:44:37,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffbffa5ed/e186c7dea4794150a8bef5579acebfdd [2020-12-22 04:44:37,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:44:37,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:44:37,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:44:37,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:44:37,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:44:37,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55971f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37, skipping insertion in model container [2020-12-22 04:44:37,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:44:37,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:44:37,781 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2020-12-22 04:44:37,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:44:37,806 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:44:37,820 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2020-12-22 04:44:37,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:44:37,841 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:44:37,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37 WrapperNode [2020-12-22 04:44:37,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:44:37,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:44:37,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:44:37,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:44:37,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:44:37,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:44:37,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:44:37,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:44:37,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (1/1) ... [2020-12-22 04:44:37,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:44:37,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:44:37,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:44:37,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:44:37,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (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 [2020-12-22 04:44:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:44:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:44:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:44:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:44:38,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:44:38,302 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 04:44:38,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:44:38 BoogieIcfgContainer [2020-12-22 04:44:38,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:44:38,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:44:38,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:44:38,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:44:38,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:44:37" (1/3) ... [2020-12-22 04:44:38,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9ede8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:44:38, skipping insertion in model container [2020-12-22 04:44:38,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:37" (2/3) ... [2020-12-22 04:44:38,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9ede8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:44:38, skipping insertion in model container [2020-12-22 04:44:38,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:44:38" (3/3) ... [2020-12-22 04:44:38,315 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2020-12-22 04:44:38,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:44:38,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 04:44:38,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 04:44:38,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:44:38,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:44:38,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:44:38,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:44:38,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:44:38,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:44:38,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:44:38,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:44:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 04:44:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:44:38,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:38,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:44:38,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash 889681499, now seen corresponding path program 1 times [2020-12-22 04:44:38,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628092906] [2020-12-22 04:44:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628092906] [2020-12-22 04:44:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:38,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357609239] [2020-12-22 04:44:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:38,811 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-22 04:44:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:38,856 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2020-12-22 04:44:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:38,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:44:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:38,869 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:44:38,869 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:44:38,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:44:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2020-12-22 04:44:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:44:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 04:44:38,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2020-12-22 04:44:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:38,914 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 04:44:38,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 04:44:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:44:38,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:38,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:38,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:44:38,918 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1810811368, now seen corresponding path program 1 times [2020-12-22 04:44:38,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:38,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169180450] [2020-12-22 04:44:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:38,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169180450] [2020-12-22 04:44:38,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:38,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:39,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773244990] [2020-12-22 04:44:39,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:39,003 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-12-22 04:44:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:39,032 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-12-22 04:44:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:39,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 04:44:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:39,034 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:44:39,034 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:44:39,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:44:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-12-22 04:44:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:44:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 04:44:39,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2020-12-22 04:44:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:39,041 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 04:44:39,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 04:44:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:44:39,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:39,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:39,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:44:39,042 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash 301781204, now seen corresponding path program 1 times [2020-12-22 04:44:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:39,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82694990] [2020-12-22 04:44:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:39,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82694990] [2020-12-22 04:44:39,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:39,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902047913] [2020-12-22 04:44:39,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:39,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:39,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:39,095 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2020-12-22 04:44:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:39,120 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-22 04:44:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:39,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:44:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:39,122 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:44:39,122 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:44:39,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:44:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 04:44:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:44:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 04:44:39,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2020-12-22 04:44:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:39,131 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 04:44:39,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 04:44:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:44:39,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:39,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:39,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:44:39,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:39,135 INFO L82 PathProgramCache]: Analyzing trace with hash 766948121, now seen corresponding path program 1 times [2020-12-22 04:44:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:39,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700220177] [2020-12-22 04:44:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:39,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700220177] [2020-12-22 04:44:39,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545907339] [2020-12-22 04:44:39,235 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 [2020-12-22 04:44:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:44:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:39,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:39,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:44:39,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381448612] [2020-12-22 04:44:39,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:44:39,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:44:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:44:39,355 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-22 04:44:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:39,386 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-12-22 04:44:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:44:39,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:44:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:39,388 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:44:39,388 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:44:39,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:44:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:44:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:44:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:44:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:44:39,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 9 [2020-12-22 04:44:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:39,394 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:44:39,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:44:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:44:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:44:39,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:39,396 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:39,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:39,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1992746636, now seen corresponding path program 2 times [2020-12-22 04:44:39,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:39,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315726140] [2020-12-22 04:44:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315726140] [2020-12-22 04:44:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054182413] [2020-12-22 04:44:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:39,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:39,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:44:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:39,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:39,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:44:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564416016] [2020-12-22 04:44:39,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:44:39,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:39,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:44:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:44:39,956 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-22 04:44:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:40,015 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-22 04:44:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:44:40,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:44:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:40,017 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:44:40,017 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:44:40,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:44:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:44:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 04:44:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:44:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:44:40,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-22 04:44:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:40,029 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:44:40,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:44:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:44:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:44:40,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:40,031 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:40,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:40,239 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1643938183, now seen corresponding path program 3 times [2020-12-22 04:44:40,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:40,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550917425] [2020-12-22 04:44:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:40,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550917425] [2020-12-22 04:44:40,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491339167] [2020-12-22 04:44:40,359 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 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 [2020-12-22 04:44:40,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:44:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:44:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:40,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:44:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490933166] [2020-12-22 04:44:40,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:44:40,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:44:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:44:40,535 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-12-22 04:44:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:40,591 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-22 04:44:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:44:40,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 04:44:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:40,593 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:44:40,593 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:44:40,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:44:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:44:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:44:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:44:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:44:40,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-12-22 04:44:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:40,600 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:44:40,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:44:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:44:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:44:40,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:40,601 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:40,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:40,815 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 579189268, now seen corresponding path program 4 times [2020-12-22 04:44:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:40,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247781787] [2020-12-22 04:44:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:40,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247781787] [2020-12-22 04:44:40,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33917333] [2020-12-22 04:44:40,951 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 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 [2020-12-22 04:44:41,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:44:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:41,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:41,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:44:41,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362448256] [2020-12-22 04:44:41,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:44:41,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:44:41,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:44:41,086 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-12-22 04:44:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:41,151 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-22 04:44:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:44:41,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 04:44:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:41,152 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:44:41,153 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:44:41,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:44:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:44:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 04:44:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:44:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 04:44:41,159 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2020-12-22 04:44:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:41,159 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 04:44:41,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:44:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 04:44:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:44:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:41,160 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:41,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:41,375 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 776663513, now seen corresponding path program 5 times [2020-12-22 04:44:41,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:41,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428555669] [2020-12-22 04:44:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:41,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428555669] [2020-12-22 04:44:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596265997] [2020-12-22 04:44:41,529 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 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 [2020-12-22 04:44:41,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:44:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:44:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:41,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:41,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:44:41,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193121214] [2020-12-22 04:44:41,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:44:41,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:44:41,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:44:41,680 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-12-22 04:44:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:41,763 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-12-22 04:44:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:44:41,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 04:44:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:41,764 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:44:41,764 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:44:41,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:44:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:44:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:44:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:44:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 04:44:41,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 13 [2020-12-22 04:44:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:41,770 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 04:44:41,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:44:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 04:44:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:44:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:41,771 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:41,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:41,986 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1691569484, now seen corresponding path program 6 times [2020-12-22 04:44:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:41,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817008069] [2020-12-22 04:44:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817008069] [2020-12-22 04:44:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990631197] [2020-12-22 04:44:42,161 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 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 [2020-12-22 04:44:42,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:44:42,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:44:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:42,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:42,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:44:42,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094167811] [2020-12-22 04:44:42,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:44:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:44:42,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:44:42,337 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-12-22 04:44:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:42,434 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-22 04:44:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:44:42,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 04:44:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:42,435 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:44:42,435 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:44:42,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:44:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:44:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 04:44:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:44:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:44:42,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-12-22 04:44:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:42,441 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:44:42,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:44:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:44:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:44:42,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:42,442 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:42,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:42,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash -897381063, now seen corresponding path program 7 times [2020-12-22 04:44:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341573741] [2020-12-22 04:44:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:42,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341573741] [2020-12-22 04:44:42,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967512831] [2020-12-22 04:44:42,833 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 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 [2020-12-22 04:44:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:44:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:42,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:42,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:44:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675561940] [2020-12-22 04:44:42,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:44:42,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:44:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:44:42,951 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-12-22 04:44:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:43,037 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-22 04:44:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:44:43,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-22 04:44:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:43,038 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:44:43,038 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:44:43,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:44:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:44:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:44:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:44:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:44:43,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2020-12-22 04:44:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:43,053 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:44:43,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:44:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:44:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:44:43,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:43,055 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:43,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:44:43,270 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2047343788, now seen corresponding path program 8 times [2020-12-22 04:44:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:43,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805507198] [2020-12-22 04:44:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:43,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805507198] [2020-12-22 04:44:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161977284] [2020-12-22 04:44:43,434 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 [2020-12-22 04:44:43,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:44:43,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:43,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:43,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:44:43,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498199047] [2020-12-22 04:44:43,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:44:43,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:43,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:44:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:44:43,540 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-12-22 04:44:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:43,607 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-22 04:44:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:44:43,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 04:44:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:43,609 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:44:43,609 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:44:43,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:44:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:44:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 04:44:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:44:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 04:44:43,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2020-12-22 04:44:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:43,614 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 04:44:43,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:44:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 04:44:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:44:43,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:43,614 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:43,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 04:44:43,829 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash 958517401, now seen corresponding path program 9 times [2020-12-22 04:44:43,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:43,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451931515] [2020-12-22 04:44:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:44,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451931515] [2020-12-22 04:44:44,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509773765] [2020-12-22 04:44:44,006 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 [2020-12-22 04:44:44,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:44:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:44,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:44:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:44,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:44,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:44:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231341889] [2020-12-22 04:44:44,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:44:44,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:44:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:44:44,184 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-12-22 04:44:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:44,271 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-22 04:44:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:44:44,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 04:44:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:44,273 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:44:44,273 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:44:44,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:44:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:44:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:44:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:44:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 04:44:44,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-12-22 04:44:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:44,278 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 04:44:44,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:44:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 04:44:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:44:44,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:44,279 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:44,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:44,486 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:44,487 INFO L82 PathProgramCache]: Analyzing trace with hash -349066252, now seen corresponding path program 10 times [2020-12-22 04:44:44,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:44,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313839807] [2020-12-22 04:44:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313839807] [2020-12-22 04:44:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731634980] [2020-12-22 04:44:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:44:44,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:44:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:44,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:44,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:44:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844521449] [2020-12-22 04:44:44,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:44:44,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:44:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:44:44,831 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2020-12-22 04:44:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:44,941 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-12-22 04:44:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:44:44,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-12-22 04:44:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:44,942 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:44:44,943 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:44:44,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:44:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:44:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 04:44:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:44:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 04:44:44,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-12-22 04:44:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:44,948 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 04:44:44,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:44:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 04:44:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:44:44,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:44,949 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:45,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:45,163 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:45,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2065513465, now seen corresponding path program 11 times [2020-12-22 04:44:45,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:45,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136537793] [2020-12-22 04:44:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:45,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136537793] [2020-12-22 04:44:45,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213658796] [2020-12-22 04:44:45,359 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 [2020-12-22 04:44:45,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:44:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:44:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:45,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:45,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:44:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31993581] [2020-12-22 04:44:45,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:44:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:44:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:44:45,629 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-12-22 04:44:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:45,755 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-12-22 04:44:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:44:45,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 04:44:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:45,756 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:44:45,756 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:44:45,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:44:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:44:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:44:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:44:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 04:44:45,772 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2020-12-22 04:44:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:45,775 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 04:44:45,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:44:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 04:44:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:44:45,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:45,776 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:45,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:44:45,979 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash -391926636, now seen corresponding path program 12 times [2020-12-22 04:44:45,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:45,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839950969] [2020-12-22 04:44:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:46,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839950969] [2020-12-22 04:44:46,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702309223] [2020-12-22 04:44:46,196 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 [2020-12-22 04:44:46,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:44:46,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:44:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:46,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:46,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:44:46,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907917791] [2020-12-22 04:44:46,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:44:46,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:44:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:44:46,412 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2020-12-22 04:44:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:46,574 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-22 04:44:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:44:46,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 04:44:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:46,576 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:44:46,576 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:44:46,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:44:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:44:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 04:44:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:44:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 04:44:46,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2020-12-22 04:44:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:46,594 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 04:44:46,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:44:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 04:44:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:44:46,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:46,595 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:46,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:44:46,802 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash 736841561, now seen corresponding path program 13 times [2020-12-22 04:44:46,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355119175] [2020-12-22 04:44:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355119175] [2020-12-22 04:44:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26312837] [2020-12-22 04:44:47,046 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 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 [2020-12-22 04:44:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:44:47,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:47,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:47,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:44:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476354075] [2020-12-22 04:44:47,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:44:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:44:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:44:47,163 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2020-12-22 04:44:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:47,306 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-12-22 04:44:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:44:47,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 04:44:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:47,307 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:44:47,307 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:44:47,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:44:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:44:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:44:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:44:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-22 04:44:47,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2020-12-22 04:44:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:47,312 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-22 04:44:47,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:44:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-22 04:44:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:44:47,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:47,313 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:47,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:44:47,522 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1368917300, now seen corresponding path program 14 times [2020-12-22 04:44:47,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:47,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526387122] [2020-12-22 04:44:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526387122] [2020-12-22 04:44:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524180472] [2020-12-22 04:44:47,775 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 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 [2020-12-22 04:44:47,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:47,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:44:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:47,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:44:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853044857] [2020-12-22 04:44:47,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:44:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:44:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:44:47,909 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 18 states. [2020-12-22 04:44:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:48,082 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-22 04:44:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:44:48,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 04:44:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:48,083 INFO L225 Difference]: With dead ends: 69 [2020-12-22 04:44:48,084 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:44:48,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:44:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:44:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 04:44:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:44:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 04:44:48,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 22 [2020-12-22 04:44:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:48,088 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 04:44:48,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:44:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 04:44:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:44:48,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:48,089 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:48,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:48,304 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash -511571271, now seen corresponding path program 15 times [2020-12-22 04:44:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712870937] [2020-12-22 04:44:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:48,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712870937] [2020-12-22 04:44:48,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103087296] [2020-12-22 04:44:48,588 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 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 [2020-12-22 04:44:48,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:44:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:44:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:48,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:48,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:44:48,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068701930] [2020-12-22 04:44:48,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:44:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:44:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:44:48,862 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 19 states. [2020-12-22 04:44:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:49,105 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-12-22 04:44:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:44:49,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-12-22 04:44:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:49,106 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:44:49,106 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:44:49,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:44:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:44:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:44:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:44:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-22 04:44:49,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-12-22 04:44:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:49,112 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-22 04:44:49,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:44:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-22 04:44:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:44:49,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:49,113 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:49,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:44:49,317 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1322825172, now seen corresponding path program 16 times [2020-12-22 04:44:49,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:49,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768418892] [2020-12-22 04:44:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:49,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768418892] [2020-12-22 04:44:49,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754546412] [2020-12-22 04:44:49,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:44:49,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:49,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:44:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:49,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:49,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:44:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218780540] [2020-12-22 04:44:49,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:44:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:44:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:44:49,785 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 20 states. [2020-12-22 04:44:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:50,007 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-12-22 04:44:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:44:50,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-22 04:44:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:50,009 INFO L225 Difference]: With dead ends: 73 [2020-12-22 04:44:50,009 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:44:50,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:44:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:44:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 04:44:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:44:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 04:44:50,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2020-12-22 04:44:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:50,014 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 04:44:50,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:44:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 04:44:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:44:50,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:50,014 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:50,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:50,229 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1940427239, now seen corresponding path program 17 times [2020-12-22 04:44:50,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:50,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277279258] [2020-12-22 04:44:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:50,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277279258] [2020-12-22 04:44:50,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553284234] [2020-12-22 04:44:50,585 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 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 [2020-12-22 04:44:50,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:44:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:44:50,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:51,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:51,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:44:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016253519] [2020-12-22 04:44:51,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:44:51,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:44:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:44:51,042 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 21 states. [2020-12-22 04:44:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:51,286 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-12-22 04:44:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:44:51,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-12-22 04:44:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:51,287 INFO L225 Difference]: With dead ends: 75 [2020-12-22 04:44:51,287 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:44:51,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:44:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:44:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:44:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:44:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-22 04:44:51,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2020-12-22 04:44:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:51,291 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-22 04:44:51,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:44:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-22 04:44:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:44:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:51,292 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:51,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:51,496 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -22036876, now seen corresponding path program 18 times [2020-12-22 04:44:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:51,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310752601] [2020-12-22 04:44:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310752601] [2020-12-22 04:44:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378835482] [2020-12-22 04:44:51,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:44:52,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:44:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:44:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:52,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:52,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:44:52,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316593734] [2020-12-22 04:44:52,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:44:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:44:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:44:52,389 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 22 states. [2020-12-22 04:44:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:52,627 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-12-22 04:44:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:44:52,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-22 04:44:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:52,628 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:44:52,628 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:44:52,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:44:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:44:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 04:44:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:44:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 04:44:52,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 26 [2020-12-22 04:44:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:52,634 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 04:44:52,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:44:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 04:44:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:44:52,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:52,639 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:52,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:44:52,843 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -681477767, now seen corresponding path program 19 times [2020-12-22 04:44:52,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:52,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365952353] [2020-12-22 04:44:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:53,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365952353] [2020-12-22 04:44:53,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804831264] [2020-12-22 04:44:53,251 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 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 [2020-12-22 04:44:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:44:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:53,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:53,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:44:53,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747230413] [2020-12-22 04:44:53,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:44:53,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:44:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:44:53,380 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 23 states. [2020-12-22 04:44:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:53,663 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-12-22 04:44:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:44:53,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-12-22 04:44:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:53,665 INFO L225 Difference]: With dead ends: 79 [2020-12-22 04:44:53,665 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:44:53,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:44:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:44:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:44:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:44:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-22 04:44:53,669 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-12-22 04:44:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:53,669 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-22 04:44:53,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:44:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-22 04:44:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:44:53,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:53,670 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:53,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:53,884 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash 350691092, now seen corresponding path program 20 times [2020-12-22 04:44:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:53,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801266681] [2020-12-22 04:44:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801266681] [2020-12-22 04:44:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561343738] [2020-12-22 04:44:54,366 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 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 [2020-12-22 04:44:54,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:44:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:54,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:54,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:44:54,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189455781] [2020-12-22 04:44:54,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:44:54,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:44:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:44:54,509 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 24 states. [2020-12-22 04:44:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:54,856 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-22 04:44:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:44:54,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-22 04:44:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:54,857 INFO L225 Difference]: With dead ends: 81 [2020-12-22 04:44:54,857 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:44:54,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:44:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:44:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 04:44:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:44:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 04:44:54,861 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 28 [2020-12-22 04:44:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:54,862 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 04:44:54,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:44:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 04:44:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:44:54,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:54,863 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:55,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:44:55,075 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2011812647, now seen corresponding path program 21 times [2020-12-22 04:44:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420544498] [2020-12-22 04:44:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:55,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420544498] [2020-12-22 04:44:55,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033596543] [2020-12-22 04:44:55,569 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 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 [2020-12-22 04:44:55,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:44:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:44:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:56,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:56,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:44:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763889898] [2020-12-22 04:44:56,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:44:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:44:56,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:44:56,215 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 25 states. [2020-12-22 04:44:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:56,588 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-22 04:44:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:44:56,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-12-22 04:44:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:56,593 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:44:56,593 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:44:56,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:44:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:44:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:44:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:44:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-22 04:44:56,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 29 [2020-12-22 04:44:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:56,603 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-22 04:44:56,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:44:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-22 04:44:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:44:56,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:56,604 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:56,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:44:56,808 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2059982772, now seen corresponding path program 22 times [2020-12-22 04:44:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:56,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478299229] [2020-12-22 04:44:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478299229] [2020-12-22 04:44:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316056392] [2020-12-22 04:44:57,336 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 [2020-12-22 04:44:57,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:57,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:57,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:44:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:57,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:57,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:44:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371075678] [2020-12-22 04:44:57,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:44:57,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:44:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:44:57,464 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 26 states. [2020-12-22 04:44:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:57,874 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-12-22 04:44:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:44:57,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-12-22 04:44:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:57,875 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:44:57,875 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:44:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:44:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:44:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 04:44:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:44:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 04:44:57,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 30 [2020-12-22 04:44:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 04:44:57,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:44:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 04:44:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:44:57,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:57,882 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:58,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:58,095 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash -563378119, now seen corresponding path program 23 times [2020-12-22 04:44:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:58,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187549122] [2020-12-22 04:44:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:58,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187549122] [2020-12-22 04:44:58,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091420777] [2020-12-22 04:44:58,637 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 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 [2020-12-22 04:45:00,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:45:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:00,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:45:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:01,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:01,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:45:01,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99833514] [2020-12-22 04:45:01,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:45:01,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:01,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:45:01,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:45:01,489 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 27 states. [2020-12-22 04:45:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:01,968 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-12-22 04:45:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:45:01,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-12-22 04:45:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:01,969 INFO L225 Difference]: With dead ends: 87 [2020-12-22 04:45:01,969 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:45:01,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 21 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:45:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:45:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:45:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:45:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-22 04:45:01,976 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2020-12-22 04:45:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:01,976 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-22 04:45:01,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:45:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-22 04:45:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:45:01,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:01,977 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:02,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:45:02,186 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -283187116, now seen corresponding path program 24 times [2020-12-22 04:45:02,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:02,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730914464] [2020-12-22 04:45:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:02,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730914464] [2020-12-22 04:45:02,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591089367] [2020-12-22 04:45:02,834 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 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 [2020-12-22 04:45:03,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:45:03,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:45:03,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:03,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:03,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:45:03,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385992923] [2020-12-22 04:45:03,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:45:03,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:45:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:45:03,543 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 28 states. [2020-12-22 04:45:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:04,055 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-12-22 04:45:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:45:04,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-12-22 04:45:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:04,056 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:45:04,056 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:45:04,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:45:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:45:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-22 04:45:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:45:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:45:04,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 32 [2020-12-22 04:45:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:04,059 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:45:04,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:45:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:45:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:45:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:04,060 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:04,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:04,262 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -187200615, now seen corresponding path program 25 times [2020-12-22 04:45:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165563289] [2020-12-22 04:45:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:04,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165563289] [2020-12-22 04:45:04,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172170929] [2020-12-22 04:45:04,926 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 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 [2020-12-22 04:45:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:45:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:05,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:05,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:45:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977601269] [2020-12-22 04:45:05,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:45:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:45:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:45:05,080 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 29 states. [2020-12-22 04:45:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:05,630 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-12-22 04:45:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:45:05,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-12-22 04:45:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:05,631 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:45:05,631 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:45:05,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:45:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:45:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:45:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:45:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-22 04:45:05,635 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 33 [2020-12-22 04:45:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:05,635 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-22 04:45:05,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:45:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-22 04:45:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:45:05,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:05,635 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:05,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:45:05,836 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1506586380, now seen corresponding path program 26 times [2020-12-22 04:45:05,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:05,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076438399] [2020-12-22 04:45:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:06,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076438399] [2020-12-22 04:45:06,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066973473] [2020-12-22 04:45:06,450 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 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 [2020-12-22 04:45:06,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:06,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:45:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:06,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:06,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:45:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665449173] [2020-12-22 04:45:06,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:45:06,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:45:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:45:06,592 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 30 states. [2020-12-22 04:45:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:07,144 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-22 04:45:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:45:07,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-12-22 04:45:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:07,146 INFO L225 Difference]: With dead ends: 93 [2020-12-22 04:45:07,146 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:45:07,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:45:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:45:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-22 04:45:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:45:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:45:07,150 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 34 [2020-12-22 04:45:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:07,151 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:45:07,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:45:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:45:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:45:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:07,151 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:07,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:45:07,366 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:07,367 INFO L82 PathProgramCache]: Analyzing trace with hash 542127865, now seen corresponding path program 27 times [2020-12-22 04:45:07,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:07,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041672963] [2020-12-22 04:45:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041672963] [2020-12-22 04:45:08,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392617005] [2020-12-22 04:45:08,093 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 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 [2020-12-22 04:45:08,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 04:45:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:45:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:08,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:08,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:45:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419536186] [2020-12-22 04:45:08,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:45:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:45:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:45:08,858 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 31 states. [2020-12-22 04:45:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:09,409 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-12-22 04:45:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:45:09,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-22 04:45:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:09,411 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:45:09,411 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:45:09,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:45:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:45:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:45:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:45:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-22 04:45:09,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 35 [2020-12-22 04:45:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:09,415 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-22 04:45:09,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:45:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-22 04:45:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:45:09,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:09,416 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:09,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:09,620 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -372239980, now seen corresponding path program 28 times [2020-12-22 04:45:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:09,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178836716] [2020-12-22 04:45:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178836716] [2020-12-22 04:45:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634541831] [2020-12-22 04:45:10,405 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 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 [2020-12-22 04:45:10,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:45:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:10,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:45:10,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208297718] [2020-12-22 04:45:10,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:45:10,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:45:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:45:10,555 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 32 states. [2020-12-22 04:45:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:11,159 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-12-22 04:45:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:45:11,164 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-12-22 04:45:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:11,165 INFO L225 Difference]: With dead ends: 97 [2020-12-22 04:45:11,165 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:45:11,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:45:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:45:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 04:45:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:45:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:45:11,169 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 36 [2020-12-22 04:45:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:11,169 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:45:11,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:45:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:45:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:45:11,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:11,170 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:11,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:11,379 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1347127897, now seen corresponding path program 29 times [2020-12-22 04:45:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:11,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856662687] [2020-12-22 04:45:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856662687] [2020-12-22 04:45:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230545550] [2020-12-22 04:45:12,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:45:14,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:45:14,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:14,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:45:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:15,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:15,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:45:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162177495] [2020-12-22 04:45:15,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:45:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:45:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:45:15,848 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 33 states. [2020-12-22 04:45:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:16,538 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-12-22 04:45:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:45:16,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-22 04:45:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:16,544 INFO L225 Difference]: With dead ends: 99 [2020-12-22 04:45:16,544 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:45:16,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:45:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:45:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:45:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:45:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-22 04:45:16,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 37 [2020-12-22 04:45:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:16,548 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-22 04:45:16,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:45:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-22 04:45:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:45:16,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:16,549 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:16,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 04:45:16,753 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1187042764, now seen corresponding path program 30 times [2020-12-22 04:45:16,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:16,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314421282] [2020-12-22 04:45:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:17,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314421282] [2020-12-22 04:45:17,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091947026] [2020-12-22 04:45:17,513 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 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 [2020-12-22 04:45:19,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:45:19,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:19,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 04:45:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:19,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:19,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:45:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884170955] [2020-12-22 04:45:19,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:45:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:45:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:45:19,941 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 34 states. [2020-12-22 04:45:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:20,694 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-12-22 04:45:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:45:20,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-12-22 04:45:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:20,705 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:45:20,705 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:45:20,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 17 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:45:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:45:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-22 04:45:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:45:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-22 04:45:20,710 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2020-12-22 04:45:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:20,710 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-22 04:45:20,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:45:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-22 04:45:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:45:20,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:20,711 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:20,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:20,915 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:20,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1858045369, now seen corresponding path program 31 times [2020-12-22 04:45:20,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:20,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281948181] [2020-12-22 04:45:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281948181] [2020-12-22 04:45:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077580273] [2020-12-22 04:45:21,788 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 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 [2020-12-22 04:45:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:45:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:21,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:21,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:45:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100997768] [2020-12-22 04:45:21,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:45:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:45:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:45:21,954 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2020-12-22 04:45:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:22,683 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-22 04:45:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:45:22,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-12-22 04:45:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:22,686 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:45:22,686 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:45:22,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:45:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:45:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:45:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:45:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-22 04:45:22,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2020-12-22 04:45:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:22,691 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-22 04:45:22,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:45:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-22 04:45:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:45:22,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:22,692 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:22,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:45:22,900 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1766496980, now seen corresponding path program 32 times [2020-12-22 04:45:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:22,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231330474] [2020-12-22 04:45:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231330474] [2020-12-22 04:45:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199916503] [2020-12-22 04:45:23,843 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 [2020-12-22 04:45:23,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:45:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:24,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:24,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:45:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199466067] [2020-12-22 04:45:24,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:45:24,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:45:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:45:24,014 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 36 states. [2020-12-22 04:45:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:24,818 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-12-22 04:45:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:45:24,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-22 04:45:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:24,819 INFO L225 Difference]: With dead ends: 105 [2020-12-22 04:45:24,819 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:45:24,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:45:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:45:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-22 04:45:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:45:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 04:45:24,828 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2020-12-22 04:45:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:24,828 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 04:45:24,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:45:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 04:45:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:45:24,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:24,829 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:25,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:45:25,032 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1071503079, now seen corresponding path program 33 times [2020-12-22 04:45:25,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:25,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823089476] [2020-12-22 04:45:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:26,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823089476] [2020-12-22 04:45:26,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387499453] [2020-12-22 04:45:26,058 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 [2020-12-22 04:45:27,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:45:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:45:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:28,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:28,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:45:28,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444494776] [2020-12-22 04:45:28,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:45:28,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:45:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:45:28,017 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 37 states. [2020-12-22 04:45:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:28,894 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-12-22 04:45:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:45:28,894 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-12-22 04:45:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:28,895 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:45:28,895 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:45:28,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:45:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:45:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:45:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:45:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-22 04:45:28,900 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 41 [2020-12-22 04:45:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:28,900 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-22 04:45:28,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:45:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-22 04:45:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:45:28,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:28,901 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:29,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:45:29,104 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1144808308, now seen corresponding path program 34 times [2020-12-22 04:45:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:29,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203695269] [2020-12-22 04:45:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:30,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203695269] [2020-12-22 04:45:30,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332747866] [2020-12-22 04:45:30,110 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 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 [2020-12-22 04:45:30,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:30,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:45:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:30,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:30,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:45:30,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456770247] [2020-12-22 04:45:30,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:45:30,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:30,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:45:30,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:45:30,285 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 38 states. [2020-12-22 04:45:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:31,187 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-12-22 04:45:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:45:31,188 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-12-22 04:45:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:31,189 INFO L225 Difference]: With dead ends: 109 [2020-12-22 04:45:31,189 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:45:31,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:45:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:45:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 04:45:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:45:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 04:45:31,193 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 42 [2020-12-22 04:45:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:31,193 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 04:45:31,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:45:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 04:45:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:45:31,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:31,194 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:31,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:45:31,408 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:31,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1130984569, now seen corresponding path program 35 times [2020-12-22 04:45:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:31,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071002016] [2020-12-22 04:45:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071002016] [2020-12-22 04:45:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151220719] [2020-12-22 04:45:32,510 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 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 [2020-12-22 04:45:36,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:45:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:45:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:36,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:36,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:45:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535789718] [2020-12-22 04:45:36,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:45:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:45:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:45:36,726 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 39 states. [2020-12-22 04:45:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:37,573 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-12-22 04:45:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:45:37,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-12-22 04:45:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:37,574 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:45:37,574 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:45:37,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:45:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:45:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:45:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:45:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-22 04:45:37,579 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2020-12-22 04:45:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:37,579 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-22 04:45:37,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:45:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-22 04:45:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:45:37,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:37,580 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:37,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:45:37,784 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash 702448660, now seen corresponding path program 36 times [2020-12-22 04:45:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:37,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732572610] [2020-12-22 04:45:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:38,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732572610] [2020-12-22 04:45:38,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021785941] [2020-12-22 04:45:38,885 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 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 [2020-12-22 04:45:42,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:45:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:42,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:45:42,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:42,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:42,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:45:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144658841] [2020-12-22 04:45:42,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:45:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:45:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:45:42,778 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 40 states. [2020-12-22 04:45:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:43,836 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-22 04:45:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:45:43,837 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-12-22 04:45:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:43,837 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:45:43,837 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:45:43,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:45:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:45:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-22 04:45:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:45:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 04:45:43,842 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 44 [2020-12-22 04:45:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:43,843 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 04:45:43,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:45:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 04:45:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:45:43,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:43,843 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:44,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:45:44,048 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash 302737369, now seen corresponding path program 37 times [2020-12-22 04:45:44,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:44,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226109791] [2020-12-22 04:45:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:45,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226109791] [2020-12-22 04:45:45,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828966484] [2020-12-22 04:45:45,212 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 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 [2020-12-22 04:45:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:45:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:45,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:45,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:45:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685113079] [2020-12-22 04:45:45,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:45:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:45:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:45:45,392 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 41 states. [2020-12-22 04:45:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:46,506 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-12-22 04:45:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:45:46,510 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-12-22 04:45:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:46,511 INFO L225 Difference]: With dead ends: 115 [2020-12-22 04:45:46,511 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:45:46,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:45:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:45:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:45:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:45:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-22 04:45:46,519 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2020-12-22 04:45:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:46,519 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-22 04:45:46,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:45:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-22 04:45:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:45:46,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:46,519 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:46,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:45:46,720 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash 796589236, now seen corresponding path program 38 times [2020-12-22 04:45:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:46,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864197542] [2020-12-22 04:45:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:47,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864197542] [2020-12-22 04:45:47,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320001744] [2020-12-22 04:45:47,983 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 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 [2020-12-22 04:45:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:45:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:48,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:48,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:45:48,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832807631] [2020-12-22 04:45:48,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:45:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:45:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:45:48,160 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 42 states. [2020-12-22 04:45:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:49,311 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-12-22 04:45:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:45:49,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-12-22 04:45:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:49,312 INFO L225 Difference]: With dead ends: 117 [2020-12-22 04:45:49,312 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:45:49,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:45:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:45:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 04:45:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:45:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 04:45:49,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2020-12-22 04:45:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:49,318 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 04:45:49,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:45:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 04:45:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:45:49,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:49,318 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:49,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:49,533 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1073872071, now seen corresponding path program 39 times [2020-12-22 04:45:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:49,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501001645] [2020-12-22 04:45:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:50,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501001645] [2020-12-22 04:45:50,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834396230] [2020-12-22 04:45:50,882 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 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 [2020-12-22 04:45:52,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 04:45:52,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:52,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:45:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:53,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:53,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:45:53,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755739709] [2020-12-22 04:45:53,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:45:53,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:45:53,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:45:53,114 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 43 states. [2020-12-22 04:45:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:54,276 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-12-22 04:45:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:45:54,277 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-12-22 04:45:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:54,277 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:45:54,277 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:45:54,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:45:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:45:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:45:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:45:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-12-22 04:45:54,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2020-12-22 04:45:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:54,282 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-12-22 04:45:54,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:45:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-12-22 04:45:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:45:54,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:54,283 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:54,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:54,487 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:54,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1071369556, now seen corresponding path program 40 times [2020-12-22 04:45:54,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:54,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91188586] [2020-12-22 04:45:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91188586] [2020-12-22 04:45:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013548646] [2020-12-22 04:45:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:45:55,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:45:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:56,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:56,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:45:56,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809400731] [2020-12-22 04:45:56,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:45:56,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:56,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:45:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:45:56,122 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 44 states. [2020-12-22 04:45:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:57,319 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-12-22 04:45:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:45:57,320 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-12-22 04:45:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:57,320 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:45:57,320 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:45:57,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:45:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:45:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-22 04:45:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:45:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 04:45:57,327 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 48 [2020-12-22 04:45:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:57,328 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 04:45:57,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:45:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 04:45:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:45:57,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:57,328 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:57,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:57,543 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1145616743, now seen corresponding path program 41 times [2020-12-22 04:45:57,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:57,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081559360] [2020-12-22 04:45:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081559360] [2020-12-22 04:45:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687863051] [2020-12-22 04:45:59,059 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 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 [2020-12-22 04:46:12,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 04:46:12,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:12,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 124 conjunts are in the unsatisfiable core [2020-12-22 04:46:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:14,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:14,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:46:14,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118839169] [2020-12-22 04:46:14,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:46:14,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:46:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:46:14,307 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 45 states. [2020-12-22 04:46:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:15,571 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-12-22 04:46:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:46:15,575 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2020-12-22 04:46:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:15,575 INFO L225 Difference]: With dead ends: 123 [2020-12-22 04:46:15,576 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:46:15,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 39 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:46:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:46:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:46:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:46:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-22 04:46:15,580 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 49 [2020-12-22 04:46:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:15,580 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-22 04:46:15,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:46:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-22 04:46:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:46:15,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:15,581 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:15,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 04:46:15,782 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1152715276, now seen corresponding path program 42 times [2020-12-22 04:46:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:15,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025618638] [2020-12-22 04:46:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025618638] [2020-12-22 04:46:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085698492] [2020-12-22 04:46:17,322 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 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 [2020-12-22 04:46:24,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-22 04:46:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:46:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:24,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:24,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:46:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084505011] [2020-12-22 04:46:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:46:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:46:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:46:24,216 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 46 states. [2020-12-22 04:46:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:25,568 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-12-22 04:46:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:46:25,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2020-12-22 04:46:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:25,571 INFO L225 Difference]: With dead ends: 125 [2020-12-22 04:46:25,571 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:46:25,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:46:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:46:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-22 04:46:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:46:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 04:46:25,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 50 [2020-12-22 04:46:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:25,576 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 04:46:25,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:46:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 04:46:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:46:25,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:25,577 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:25,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:25,779 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1372769799, now seen corresponding path program 43 times [2020-12-22 04:46:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:25,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015533147] [2020-12-22 04:46:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:27,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015533147] [2020-12-22 04:46:27,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100828684] [2020-12-22 04:46:27,323 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 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 [2020-12-22 04:46:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:46:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:27,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:27,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:46:27,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698409224] [2020-12-22 04:46:27,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:46:27,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:46:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:46:27,538 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 47 states. [2020-12-22 04:46:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:28,991 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-12-22 04:46:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:46:28,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2020-12-22 04:46:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:28,997 INFO L225 Difference]: With dead ends: 127 [2020-12-22 04:46:28,997 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:46:28,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:46:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:46:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:46:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:46:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-22 04:46:29,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 51 [2020-12-22 04:46:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:29,002 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-22 04:46:29,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:46:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-22 04:46:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:46:29,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:29,003 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:29,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:29,218 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 395474580, now seen corresponding path program 44 times [2020-12-22 04:46:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121590870] [2020-12-22 04:46:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121590870] [2020-12-22 04:46:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189943203] [2020-12-22 04:46:30,831 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 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 [2020-12-22 04:46:30,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:30,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:46:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:31,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:31,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:46:31,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828782460] [2020-12-22 04:46:31,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:46:31,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:46:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:46:31,034 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 48 states. [2020-12-22 04:46:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:32,589 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-12-22 04:46:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:46:32,590 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-12-22 04:46:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:32,591 INFO L225 Difference]: With dead ends: 129 [2020-12-22 04:46:32,591 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:46:32,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:46:32,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:46:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-22 04:46:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:46:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 04:46:32,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 52 [2020-12-22 04:46:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:32,596 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 04:46:32,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:46:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 04:46:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:46:32,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:32,597 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:32,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:46:32,810 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:32,811 INFO L82 PathProgramCache]: Analyzing trace with hash -623524519, now seen corresponding path program 45 times [2020-12-22 04:46:32,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:32,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694335125] [2020-12-22 04:46:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:34,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694335125] [2020-12-22 04:46:34,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468753332] [2020-12-22 04:46:34,626 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 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 [2020-12-22 04:46:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:46:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:38,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 04:46:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:38,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:38,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:46:38,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712634909] [2020-12-22 04:46:38,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:46:38,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:46:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:46:38,993 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 49 states. [2020-12-22 04:46:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:40,606 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-12-22 04:46:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:46:40,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2020-12-22 04:46:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:40,612 INFO L225 Difference]: With dead ends: 131 [2020-12-22 04:46:40,612 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:46:40,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:46:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:46:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:46:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:46:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-22 04:46:40,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 53 [2020-12-22 04:46:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:40,618 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-22 04:46:40,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:46:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-22 04:46:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:46:40,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:40,619 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:40,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:46:40,824 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2147241780, now seen corresponding path program 46 times [2020-12-22 04:46:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:40,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640339953] [2020-12-22 04:46:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640339953] [2020-12-22 04:46:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271576127] [2020-12-22 04:46:42,662 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 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 [2020-12-22 04:46:42,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:42,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 04:46:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:42,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:42,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:46:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939492630] [2020-12-22 04:46:42,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:46:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:46:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:46:42,869 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 50 states. [2020-12-22 04:46:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:44,522 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-12-22 04:46:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:46:44,523 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2020-12-22 04:46:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:44,524 INFO L225 Difference]: With dead ends: 133 [2020-12-22 04:46:44,524 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:46:44,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:46:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:46:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 04:46:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:46:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-22 04:46:44,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 54 [2020-12-22 04:46:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:44,529 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-22 04:46:44,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:46:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-22 04:46:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:46:44,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:44,530 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:44,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:46:44,746 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2141651129, now seen corresponding path program 47 times [2020-12-22 04:46:44,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:44,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074456901] [2020-12-22 04:46:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:46,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074456901] [2020-12-22 04:46:46,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567885557] [2020-12-22 04:46:46,593 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 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 [2020-12-22 04:47:59,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:47:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:59,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 143 conjunts are in the unsatisfiable core [2020-12-22 04:47:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:02,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 04:48:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764198706] [2020-12-22 04:48:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:48:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:48:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:48:02,411 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 51 states. [2020-12-22 04:48:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:04,118 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-12-22 04:48:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:48:04,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 55 [2020-12-22 04:48:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:04,123 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:48:04,123 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:48:04,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 11 SyntacticMatches, 45 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:48:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:48:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:48:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:48:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-22 04:48:04,128 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 55 [2020-12-22 04:48:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:04,128 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-22 04:48:04,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:48:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-22 04:48:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:48:04,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:04,129 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:04,330 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1968340948, now seen corresponding path program 48 times [2020-12-22 04:48:04,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749615113] [2020-12-22 04:48:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:06,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749615113] [2020-12-22 04:48:06,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332023533] [2020-12-22 04:48:06,177 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 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 [2020-12-22 04:48:24,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:48:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:24,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 113 conjunts are in the unsatisfiable core [2020-12-22 04:48:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:25,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:25,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:48:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021615900] [2020-12-22 04:48:25,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:48:25,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:48:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:48:25,136 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 52 states. [2020-12-22 04:48:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:27,017 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-12-22 04:48:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:48:27,019 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 56 [2020-12-22 04:48:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:27,020 INFO L225 Difference]: With dead ends: 137 [2020-12-22 04:48:27,020 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:48:27,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:48:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:48:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 04:48:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:48:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 04:48:27,026 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 56 [2020-12-22 04:48:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:27,026 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 04:48:27,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:48:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 04:48:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:48:27,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:27,027 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:27,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:27,228 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 890692633, now seen corresponding path program 49 times [2020-12-22 04:48:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:27,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092249608] [2020-12-22 04:48:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092249608] [2020-12-22 04:48:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83000090] [2020-12-22 04:48:29,335 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 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 [2020-12-22 04:48:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:48:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:29,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:29,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 04:48:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838883113] [2020-12-22 04:48:29,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:48:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:48:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:48:29,574 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 53 states. [2020-12-22 04:48:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:31,503 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-12-22 04:48:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:48:31,504 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 57 [2020-12-22 04:48:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:31,504 INFO L225 Difference]: With dead ends: 139 [2020-12-22 04:48:31,504 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:48:31,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:48:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:48:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:48:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:48:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-22 04:48:31,509 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 57 [2020-12-22 04:48:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:31,509 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-22 04:48:31,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:48:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-22 04:48:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:48:31,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:31,510 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:31,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:31,711 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1843333236, now seen corresponding path program 50 times [2020-12-22 04:48:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:31,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240327617] [2020-12-22 04:48:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:33,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240327617] [2020-12-22 04:48:33,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834926407] [2020-12-22 04:48:33,919 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 [2020-12-22 04:48:33,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:33,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-22 04:48:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:34,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:34,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:48:34,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794201990] [2020-12-22 04:48:34,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:48:34,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:48:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:48:34,167 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 54 states. [2020-12-22 04:48:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:36,092 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-12-22 04:48:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:48:36,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 58 [2020-12-22 04:48:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:36,094 INFO L225 Difference]: With dead ends: 141 [2020-12-22 04:48:36,094 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 04:48:36,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:48:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 04:48:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-22 04:48:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:48:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:48:36,099 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 58 [2020-12-22 04:48:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:36,100 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:48:36,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:48:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:48:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:48:36,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:36,100 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:36,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:36,314 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1310420857, now seen corresponding path program 51 times [2020-12-22 04:48:36,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:36,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419060935] [2020-12-22 04:48:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:38,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419060935] [2020-12-22 04:48:38,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545165516] [2020-12-22 04:48:38,581 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 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 [2020-12-22 04:48:40,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-22 04:48:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:40,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 113 conjunts are in the unsatisfiable core [2020-12-22 04:48:40,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:41,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:41,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 04:48:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555313513] [2020-12-22 04:48:41,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:48:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:48:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:48:41,171 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 55 states. [2020-12-22 04:48:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:43,296 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-12-22 04:48:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:48:43,297 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 59 [2020-12-22 04:48:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:43,298 INFO L225 Difference]: With dead ends: 143 [2020-12-22 04:48:43,298 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:48:43,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:48:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:48:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:48:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:48:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-22 04:48:43,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 59 [2020-12-22 04:48:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:43,304 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-22 04:48:43,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:48:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-22 04:48:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:48:43,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:43,305 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:43,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 04:48:43,509 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:43,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1970006292, now seen corresponding path program 52 times [2020-12-22 04:48:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:43,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121423839] [2020-12-22 04:48:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121423839] [2020-12-22 04:48:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661479573] [2020-12-22 04:48:45,923 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 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 [2020-12-22 04:48:45,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:45,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:45,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:48:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:46,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:46,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:48:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166492305] [2020-12-22 04:48:46,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:48:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:48:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:48:46,172 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 56 states. [2020-12-22 04:48:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:48,412 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-12-22 04:48:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:48:48,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 60 [2020-12-22 04:48:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:48,414 INFO L225 Difference]: With dead ends: 145 [2020-12-22 04:48:48,414 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 04:48:48,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:48:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 04:48:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 04:48:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:48:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:48:48,420 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 60 [2020-12-22 04:48:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:48,420 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:48:48,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:48:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:48:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:48:48,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:48,421 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:48,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:48,636 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 942318297, now seen corresponding path program 53 times [2020-12-22 04:48:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:48,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800265972] [2020-12-22 04:48:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:51,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800265972] [2020-12-22 04:48:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910088920] [2020-12-22 04:48:51,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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