/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/array-lopstr16/flag_loopdep_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:47:30,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:47:30,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:47:30,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 22:47:30,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:47:30,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:47:30,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:47:31,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:47:31,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:47:31,001 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:47:31,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:47:31,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:47:31,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:47:31,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:47:31,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:47:31,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:47:31,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:47:31,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:47:31,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:47:31,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:47:31,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:47:31,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:47:31,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:47:31,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:47:31,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:47:31,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:47:31,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:47:31,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:47:31,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:47:31,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:47:31,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:47:31,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:47:31,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:47:31,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:47:31,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:47:31,445 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:47:31,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2020-12-21 22:47:31,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a961b7dde/122eee7efc574595ba25521d4f6a00f5/FLAG23cf8ad7c [2020-12-21 22:47:32,263 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:47:32,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2020-12-21 22:47:32,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a961b7dde/122eee7efc574595ba25521d4f6a00f5/FLAG23cf8ad7c [2020-12-21 22:47:32,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a961b7dde/122eee7efc574595ba25521d4f6a00f5 [2020-12-21 22:47:32,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:47:32,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:47:32,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:32,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:47:32,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:47:32,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74906795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32, skipping insertion in model container [2020-12-21 22:47:32,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:47:32,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:47:32,819 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/array-lopstr16/flag_loopdep_simple.i[812,825] [2020-12-21 22:47:32,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:32,853 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:47:32,867 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/array-lopstr16/flag_loopdep_simple.i[812,825] [2020-12-21 22:47:32,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:32,892 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:47:32,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32 WrapperNode [2020-12-21 22:47:32,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:32,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:32,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:47:32,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:47:32,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:32,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:47:32,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:47:32,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:47:32,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (1/1) ... [2020-12-21 22:47:32,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:47:32,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:47:32,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:47:32,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:47:32,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (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 [2020-12-21 22:47:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:47:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:47:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:47:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:47:33,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:47:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:47:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:47:33,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:47:33,381 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 22:47:33,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:33 BoogieIcfgContainer [2020-12-21 22:47:33,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:47:33,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:47:33,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:47:33,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:47:33,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:47:32" (1/3) ... [2020-12-21 22:47:33,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20998f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:33, skipping insertion in model container [2020-12-21 22:47:33,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:32" (2/3) ... [2020-12-21 22:47:33,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20998f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:33, skipping insertion in model container [2020-12-21 22:47:33,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:33" (3/3) ... [2020-12-21 22:47:33,433 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2020-12-21 22:47:33,448 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:47:33,469 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:47:33,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:47:33,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:47:33,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:47:33,558 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:47:33,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:47:33,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:47:33,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:47:33,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:47:33,559 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:47:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-21 22:47:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:47:33,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:33,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:33,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2020-12-21 22:47:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:33,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026214475] [2020-12-21 22:47:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026214475] [2020-12-21 22:47:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:33,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:47:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298242615] [2020-12-21 22:47:33,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:47:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:47:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:47:33,808 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-21 22:47:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:33,827 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2020-12-21 22:47:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:47:33,829 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 22:47:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:33,840 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:47:33,840 INFO L226 Difference]: Without dead ends: 16 [2020-12-21 22:47:33,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:47:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-21 22:47:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-21 22:47:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 22:47:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-21 22:47:33,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2020-12-21 22:47:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:33,882 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-21 22:47:33,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:47:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-21 22:47:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:47:33,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:33,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:33,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:47:33,884 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2020-12-21 22:47:33,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:33,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233789998] [2020-12-21 22:47:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:33,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233789998] [2020-12-21 22:47:33,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:33,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:33,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98487654] [2020-12-21 22:47:33,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:33,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:33,975 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2020-12-21 22:47:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:34,024 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-21 22:47:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:34,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 22:47:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:34,028 INFO L225 Difference]: With dead ends: 30 [2020-12-21 22:47:34,028 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 22:47:34,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 22:47:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-21 22:47:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:47:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:47:34,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-12-21 22:47:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:34,044 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:47:34,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:47:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:47:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:34,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:34,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:47:34,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2020-12-21 22:47:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494885578] [2020-12-21 22:47:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494885578] [2020-12-21 22:47:34,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:34,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880939289] [2020-12-21 22:47:34,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:34,165 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2020-12-21 22:47:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:34,240 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-12-21 22:47:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:34,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 22:47:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:34,244 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:47:34,245 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:47:34,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:47:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2020-12-21 22:47:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:47:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-21 22:47:34,258 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-12-21 22:47:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:34,259 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-21 22:47:34,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-21 22:47:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:47:34,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:34,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:34,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:47:34,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2020-12-21 22:47:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:34,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759391371] [2020-12-21 22:47:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:34,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759391371] [2020-12-21 22:47:34,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054924664] [2020-12-21 22:47:34,363 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 [2020-12-21 22:47:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:34,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 22:47:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:34,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:47:34,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 22:47:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464427314] [2020-12-21 22:47:34,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:34,465 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2020-12-21 22:47:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:34,478 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-21 22:47:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:34,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-21 22:47:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:34,480 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:47:34,480 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 22:47:34,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 22:47:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-21 22:47:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:47:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:47:34,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2020-12-21 22:47:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:34,485 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:47:34,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:47:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:47:34,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:34,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:34,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:34,702 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2020-12-21 22:47:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:34,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297066217] [2020-12-21 22:47:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:34,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297066217] [2020-12-21 22:47:34,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270584838] [2020-12-21 22:47:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:47:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:34,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:34,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:47:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799473437] [2020-12-21 22:47:34,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:47:34,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:47:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:34,953 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:47:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:35,011 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-12-21 22:47:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:47:35,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:47:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:35,013 INFO L225 Difference]: With dead ends: 53 [2020-12-21 22:47:35,013 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:47:35,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:47:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-12-21 22:47:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:47:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-21 22:47:35,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-12-21 22:47:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:35,020 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-21 22:47:35,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:47:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-21 22:47:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:47:35,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:35,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:35,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:35,236 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2139127327, now seen corresponding path program 2 times [2020-12-21 22:47:35,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269679401] [2020-12-21 22:47:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:47:35,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269679401] [2020-12-21 22:47:35,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227276688] [2020-12-21 22:47:35,302 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 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 [2020-12-21 22:47:35,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:47:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:47:35,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:35,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:47:35,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563254591] [2020-12-21 22:47:35,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:47:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:35,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:47:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:35,455 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-12-21 22:47:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:35,482 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-21 22:47:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:47:35,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-21 22:47:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:35,483 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:47:35,483 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 22:47:35,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 22:47:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-21 22:47:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:47:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-21 22:47:35,489 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-12-21 22:47:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:35,489 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-21 22:47:35,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:47:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-21 22:47:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:47:35,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:35,491 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:35,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:35,705 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -331071005, now seen corresponding path program 3 times [2020-12-21 22:47:35,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:35,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621891416] [2020-12-21 22:47:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:47:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621891416] [2020-12-21 22:47:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713316735] [2020-12-21 22:47:35,778 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 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 [2020-12-21 22:47:35,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:47:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:47:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:47:35,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:35,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 22:47:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134118837] [2020-12-21 22:47:35,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:47:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:47:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:35,881 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-12-21 22:47:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:35,948 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-21 22:47:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:47:35,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-21 22:47:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:35,949 INFO L225 Difference]: With dead ends: 70 [2020-12-21 22:47:35,950 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 22:47:35,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 22:47:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2020-12-21 22:47:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:47:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-21 22:47:35,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-12-21 22:47:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:35,956 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-21 22:47:35,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:47:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-21 22:47:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:47:35,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:35,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:36,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:36,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1534672359, now seen corresponding path program 4 times [2020-12-21 22:47:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:36,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537488327] [2020-12-21 22:47:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 22:47:36,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537488327] [2020-12-21 22:47:36,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881240043] [2020-12-21 22:47:36,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:47:36,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:36,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:47:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 22:47:36,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:36,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-21 22:47:36,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168802366] [2020-12-21 22:47:36,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:47:36,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:47:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:36,383 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2020-12-21 22:47:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:36,473 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-12-21 22:47:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:47:36,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-12-21 22:47:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:36,474 INFO L225 Difference]: With dead ends: 85 [2020-12-21 22:47:36,474 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 22:47:36,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 22:47:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2020-12-21 22:47:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:47:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-21 22:47:36,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2020-12-21 22:47:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:36,481 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-21 22:47:36,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:47:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-21 22:47:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 22:47:36,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:36,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:36,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:36,698 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1766720103, now seen corresponding path program 5 times [2020-12-21 22:47:36,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:36,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787833556] [2020-12-21 22:47:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 22:47:36,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787833556] [2020-12-21 22:47:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306826312] [2020-12-21 22:47:36,800 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 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 [2020-12-21 22:47:36,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:47:36,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:47:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:47:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:36,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-21 22:47:36,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648757386] [2020-12-21 22:47:36,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:47:36,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:47:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:47:36,980 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 13 states. [2020-12-21 22:47:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:37,109 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-21 22:47:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:47:37,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-21 22:47:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:37,110 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:47:37,111 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 22:47:37,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:47:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 22:47:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2020-12-21 22:47:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:47:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-21 22:47:37,118 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-12-21 22:47:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:37,119 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-21 22:47:37,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:47:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-21 22:47:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:47:37,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:37,120 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:37,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:37,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1089794667, now seen corresponding path program 6 times [2020-12-21 22:47:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:37,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831787798] [2020-12-21 22:47:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 22:47:37,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831787798] [2020-12-21 22:47:37,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993941500] [2020-12-21 22:47:37,495 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 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 [2020-12-21 22:47:37,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:47:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:47:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-21 22:47:37,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:37,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-21 22:47:37,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843140428] [2020-12-21 22:47:37,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:47:37,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:47:37,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:47:37,723 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2020-12-21 22:47:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:38,043 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:47:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:47:38,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-12-21 22:47:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:38,045 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:47:38,045 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 22:47:38,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:47:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 22:47:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-12-21 22:47:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:47:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-21 22:47:38,053 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2020-12-21 22:47:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:38,053 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-21 22:47:38,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:47:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-21 22:47:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 22:47:38,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:38,055 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:38,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:47:38,269 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1351978204, now seen corresponding path program 1 times [2020-12-21 22:47:38,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:38,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001561069] [2020-12-21 22:47:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-21 22:47:38,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001561069] [2020-12-21 22:47:38,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:38,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603422390] [2020-12-21 22:47:38,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:38,354 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 3 states. [2020-12-21 22:47:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:38,370 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-21 22:47:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:38,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-21 22:47:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:38,373 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:47:38,373 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 22:47:38,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 22:47:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-21 22:47:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:47:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-21 22:47:38,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-12-21 22:47:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:38,381 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-21 22:47:38,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-21 22:47:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 22:47:38,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:38,382 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:38,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-21 22:47:38,383 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2040020590, now seen corresponding path program 1 times [2020-12-21 22:47:38,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:38,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809298102] [2020-12-21 22:47:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 22:47:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809298102] [2020-12-21 22:47:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534825264] [2020-12-21 22:47:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:47:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:38,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:47:38,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 22:47:38,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:38,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-21 22:47:38,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019693268] [2020-12-21 22:47:38,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:47:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:47:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:47:38,851 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-12-21 22:47:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:38,896 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-21 22:47:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:47:38,897 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-12-21 22:47:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:38,898 INFO L225 Difference]: With dead ends: 76 [2020-12-21 22:47:38,898 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 22:47:38,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:47:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 22:47:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-21 22:47:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 22:47:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-21 22:47:38,905 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-12-21 22:47:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:38,905 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-21 22:47:38,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:47:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-21 22:47:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:47:38,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:38,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:39,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 22:47:39,122 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 461215856, now seen corresponding path program 2 times [2020-12-21 22:47:39,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419766219] [2020-12-21 22:47:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 22:47:39,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419766219] [2020-12-21 22:47:39,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224757510] [2020-12-21 22:47:39,269 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 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 [2020-12-21 22:47:39,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:47:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 22:47:39,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:39,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-21 22:47:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390366591] [2020-12-21 22:47:39,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:47:39,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:47:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:47:39,623 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 20 states. [2020-12-21 22:47:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:39,676 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-21 22:47:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:47:39,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-12-21 22:47:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:39,678 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:47:39,678 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:47:39,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:47:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:47:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-21 22:47:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:47:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-21 22:47:39,685 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-12-21 22:47:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:39,685 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-21 22:47:39,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:47:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-21 22:47:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 22:47:39,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:39,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:39,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:39,901 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:39,902 INFO L82 PathProgramCache]: Analyzing trace with hash -646678030, now seen corresponding path program 3 times [2020-12-21 22:47:39,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:39,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103502861] [2020-12-21 22:47:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 22:47:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103502861] [2020-12-21 22:47:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087938102] [2020-12-21 22:47:40,069 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 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 [2020-12-21 22:47:40,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:47:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:47:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-21 22:47:40,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:40,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 22:47:40,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512980200] [2020-12-21 22:47:40,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:47:40,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:47:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:47:40,297 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2020-12-21 22:47:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:40,426 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-21 22:47:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:47:40,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-12-21 22:47:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:40,428 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:47:40,428 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 22:47:40,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:47:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 22:47:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-12-21 22:47:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:47:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-21 22:47:40,436 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-21 22:47:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:40,436 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-21 22:47:40,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:47:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-21 22:47:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 22:47:40,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:40,438 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:40,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:40,653 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1330435568, now seen corresponding path program 4 times [2020-12-21 22:47:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:40,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844796825] [2020-12-21 22:47:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 22:47:40,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844796825] [2020-12-21 22:47:40,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384025258] [2020-12-21 22:47:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:47:40,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:40,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:40,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:47:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:41,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:41,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-21 22:47:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12752514] [2020-12-21 22:47:41,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:47:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:47:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:47:41,087 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 20 states. [2020-12-21 22:47:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:41,233 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-12-21 22:47:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:47:41,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-12-21 22:47:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:41,235 INFO L225 Difference]: With dead ends: 137 [2020-12-21 22:47:41,235 INFO L226 Difference]: Without dead ends: 106 [2020-12-21 22:47:41,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:47:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-21 22:47:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2020-12-21 22:47:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:47:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-21 22:47:41,243 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-12-21 22:47:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:41,243 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-21 22:47:41,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:47:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-21 22:47:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:47:41,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:41,244 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:41,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:47:41,460 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2088027254, now seen corresponding path program 5 times [2020-12-21 22:47:41,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:41,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125549829] [2020-12-21 22:47:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-21 22:47:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125549829] [2020-12-21 22:47:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882438086] [2020-12-21 22:47:41,675 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 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 [2020-12-21 22:47:41,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 22:47:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:41,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:47:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-21 22:47:42,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:42,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2020-12-21 22:47:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260690872] [2020-12-21 22:47:42,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:47:42,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:47:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:47:42,027 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 22 states. [2020-12-21 22:47:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:42,202 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2020-12-21 22:47:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:47:42,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-12-21 22:47:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:42,204 INFO L225 Difference]: With dead ends: 152 [2020-12-21 22:47:42,204 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:47:42,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:47:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:47:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2020-12-21 22:47:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:47:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-21 22:47:42,212 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2020-12-21 22:47:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:42,212 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-21 22:47:42,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:47:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-21 22:47:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:47:42,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:42,213 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:42,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:47:42,428 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1964209268, now seen corresponding path program 6 times [2020-12-21 22:47:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:42,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847961013] [2020-12-21 22:47:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 22:47:42,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847961013] [2020-12-21 22:47:42,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128382327] [2020-12-21 22:47:42,664 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 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 [2020-12-21 22:47:42,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-21 22:47:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:47:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-12-21 22:47:43,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:43,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-21 22:47:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817076447] [2020-12-21 22:47:43,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 22:47:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 22:47:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:47:43,249 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2020-12-21 22:47:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:43,857 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-21 22:47:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:47:43,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-21 22:47:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:43,860 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:47:43,860 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 22:47:43,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:47:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 22:47:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-12-21 22:47:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 22:47:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-21 22:47:43,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-12-21 22:47:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:43,883 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-21 22:47:43,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 22:47:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-21 22:47:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 22:47:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:43,886 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:44,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:47:44,088 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash 601482327, now seen corresponding path program 7 times [2020-12-21 22:47:44,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:44,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18534928] [2020-12-21 22:47:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18534928] [2020-12-21 22:47:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889264563] [2020-12-21 22:47:44,339 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 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 [2020-12-21 22:47:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:47:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:44,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:44,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-21 22:47:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123188775] [2020-12-21 22:47:44,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 22:47:44,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 22:47:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:47:44,936 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-12-21 22:47:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:45,006 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-12-21 22:47:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:47:45,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-12-21 22:47:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:45,007 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:47:45,007 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:47:45,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:47:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:47:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-21 22:47:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 22:47:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-21 22:47:45,015 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-12-21 22:47:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:45,015 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-21 22:47:45,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 22:47:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-21 22:47:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:47:45,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:45,017 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:45,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:45,233 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476505, now seen corresponding path program 8 times [2020-12-21 22:47:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:45,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245656154] [2020-12-21 22:47:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245656154] [2020-12-21 22:47:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328104424] [2020-12-21 22:47:45,528 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 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 [2020-12-21 22:47:45,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:45,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:47:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:46,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:46,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-21 22:47:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055352532] [2020-12-21 22:47:46,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:47:46,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:47:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:47:46,177 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-12-21 22:47:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:46,246 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-12-21 22:47:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:47:46,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-12-21 22:47:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:46,247 INFO L225 Difference]: With dead ends: 118 [2020-12-21 22:47:46,247 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 22:47:46,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:47:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 22:47:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-21 22:47:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-21 22:47:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-21 22:47:46,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-12-21 22:47:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-21 22:47:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:47:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-21 22:47:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 22:47:46,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:46,255 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:46,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:46,470 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1700725467, now seen corresponding path program 9 times [2020-12-21 22:47:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991524785] [2020-12-21 22:47:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-21 22:47:46,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991524785] [2020-12-21 22:47:46,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940869894] [2020-12-21 22:47:46,802 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 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 [2020-12-21 22:47:46,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 22:47:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:46,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:47:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-12-21 22:47:47,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:47,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-12-21 22:47:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79866361] [2020-12-21 22:47:47,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:47:47,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:47:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:47:47,166 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 27 states. [2020-12-21 22:47:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:47,394 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2020-12-21 22:47:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:47:47,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2020-12-21 22:47:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:47,396 INFO L225 Difference]: With dead ends: 176 [2020-12-21 22:47:47,396 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:47:47,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:47:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:47:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2020-12-21 22:47:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 22:47:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-21 22:47:47,401 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2020-12-21 22:47:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,402 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-21 22:47:47,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:47:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-21 22:47:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:47:47,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,403 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:47,618 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 605502177, now seen corresponding path program 10 times [2020-12-21 22:47:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132615714] [2020-12-21 22:47:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 22:47:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132615714] [2020-12-21 22:47:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257328663] [2020-12-21 22:47:47,964 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 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 [2020-12-21 22:47:48,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:47:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-21 22:47:48,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:48,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2020-12-21 22:47:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964621596] [2020-12-21 22:47:48,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 22:47:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 22:47:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:47:48,303 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 29 states. [2020-12-21 22:47:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:48,590 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2020-12-21 22:47:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 22:47:48,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-21 22:47:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:48,592 INFO L225 Difference]: With dead ends: 191 [2020-12-21 22:47:48,592 INFO L226 Difference]: Without dead ends: 146 [2020-12-21 22:47:48,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:47:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-21 22:47:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2020-12-21 22:47:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 22:47:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-12-21 22:47:48,598 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-12-21 22:47:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:48,599 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-12-21 22:47:48,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 22:47:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-12-21 22:47:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 22:47:48,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:48,600 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:48,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:47:48,814 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash -956491937, now seen corresponding path program 11 times [2020-12-21 22:47:48,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:48,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922109207] [2020-12-21 22:47:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-21 22:47:49,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922109207] [2020-12-21 22:47:49,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776931986] [2020-12-21 22:47:49,152 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 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 [2020-12-21 22:47:49,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 22:47:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:47:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 22:47:49,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2020-12-21 22:47:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549894629] [2020-12-21 22:47:49,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 22:47:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 22:47:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:47:49,928 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2020-12-21 22:47:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:50,245 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2020-12-21 22:47:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 22:47:50,246 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2020-12-21 22:47:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:50,248 INFO L225 Difference]: With dead ends: 206 [2020-12-21 22:47:50,248 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 22:47:50,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:47:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 22:47:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-12-21 22:47:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 22:47:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-21 22:47:50,256 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2020-12-21 22:47:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:50,257 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-21 22:47:50,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 22:47:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-21 22:47:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:47:50,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:50,258 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:50,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:47:50,474 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash 251556445, now seen corresponding path program 12 times [2020-12-21 22:47:50,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:50,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442589873] [2020-12-21 22:47:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 22:47:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442589873] [2020-12-21 22:47:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995845093] [2020-12-21 22:47:50,876 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 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 [2020-12-21 22:47:51,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 22:47:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:47:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-12-21 22:47:51,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:51,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-12-21 22:47:51,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783067887] [2020-12-21 22:47:51,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:47:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:51,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:47:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:47:51,700 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 32 states. [2020-12-21 22:47:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:52,352 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-21 22:47:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 22:47:52,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-12-21 22:47:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:52,354 INFO L225 Difference]: With dead ends: 153 [2020-12-21 22:47:52,354 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 22:47:52,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:47:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 22:47:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2020-12-21 22:47:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 22:47:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-21 22:47:52,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2020-12-21 22:47:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:52,362 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-21 22:47:52,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:47:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-21 22:47:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 22:47:52,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:52,363 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:52,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:47:52,577 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:52,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1233500582, now seen corresponding path program 13 times [2020-12-21 22:47:52,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:52,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976461082] [2020-12-21 22:47:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:47:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976461082] [2020-12-21 22:47:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436919384] [2020-12-21 22:47:53,010 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 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 [2020-12-21 22:47:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:47:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:47:54,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:54,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-21 22:47:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829818264] [2020-12-21 22:47:54,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:47:54,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:47:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:47:54,065 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2020-12-21 22:47:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:54,162 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2020-12-21 22:47:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:47:54,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 96 [2020-12-21 22:47:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:54,163 INFO L225 Difference]: With dead ends: 156 [2020-12-21 22:47:54,163 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 22:47:54,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:47:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 22:47:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-21 22:47:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 22:47:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-21 22:47:54,172 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-12-21 22:47:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:54,172 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-21 22:47:54,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:47:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-21 22:47:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 22:47:54,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:54,174 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:54,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 22:47:54,389 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash -272140632, now seen corresponding path program 14 times [2020-12-21 22:47:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:54,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356843023] [2020-12-21 22:47:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:47:54,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356843023] [2020-12-21 22:47:54,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972518126] [2020-12-21 22:47:54,836 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 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 [2020-12-21 22:47:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:47:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:47:55,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:55,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-21 22:47:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766775411] [2020-12-21 22:47:55,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:47:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:47:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:47:55,928 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2020-12-21 22:47:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:56,050 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-12-21 22:47:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 22:47:56,050 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-12-21 22:47:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:56,051 INFO L225 Difference]: With dead ends: 158 [2020-12-21 22:47:56,051 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 22:47:56,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:47:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 22:47:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-21 22:47:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 22:47:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-12-21 22:47:56,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2020-12-21 22:47:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:56,059 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-12-21 22:47:56,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:47:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-12-21 22:47:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 22:47:56,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:56,060 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:56,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:47:56,274 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash 210631466, now seen corresponding path program 15 times [2020-12-21 22:47:56,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:56,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487804244] [2020-12-21 22:47:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:47:56,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487804244] [2020-12-21 22:47:56,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626464008] [2020-12-21 22:47:56,809 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 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 [2020-12-21 22:47:56,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 22:47:56,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:47:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-12-21 22:47:57,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:57,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2020-12-21 22:47:57,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461809285] [2020-12-21 22:47:57,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:47:57,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:47:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:47:57,383 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 36 states. [2020-12-21 22:47:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:57,683 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2020-12-21 22:47:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:47:57,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2020-12-21 22:47:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:57,688 INFO L225 Difference]: With dead ends: 230 [2020-12-21 22:47:57,688 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:47:57,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:47:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:47:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2020-12-21 22:47:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:47:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-21 22:47:57,699 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2020-12-21 22:47:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:57,699 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-21 22:47:57,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:47:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-21 22:47:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 22:47:57,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:57,700 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:57,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:57,913 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1180537624, now seen corresponding path program 16 times [2020-12-21 22:47:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:57,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605223854] [2020-12-21 22:47:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 22:47:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605223854] [2020-12-21 22:47:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999407777] [2020-12-21 22:47:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:47:58,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:47:58,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-21 22:47:58,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:58,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2020-12-21 22:47:58,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145029949] [2020-12-21 22:47:58,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 22:47:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:58,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 22:47:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:47:58,964 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 38 states. [2020-12-21 22:47:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:59,276 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2020-12-21 22:47:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 22:47:59,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2020-12-21 22:47:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:59,278 INFO L225 Difference]: With dead ends: 245 [2020-12-21 22:47:59,278 INFO L226 Difference]: Without dead ends: 186 [2020-12-21 22:47:59,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:47:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-21 22:47:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2020-12-21 22:47:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:47:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-21 22:47:59,287 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2020-12-21 22:47:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:59,288 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-21 22:47:59,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 22:47:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-21 22:47:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 22:47:59,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:59,289 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:59,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:47:59,505 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1538188882, now seen corresponding path program 17 times [2020-12-21 22:47:59,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:59,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462247708] [2020-12-21 22:47:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-12-21 22:48:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462247708] [2020-12-21 22:48:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912974628] [2020-12-21 22:48:00,082 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 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 [2020-12-21 22:48:00,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 22:48:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:48:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-21 22:48:01,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:01,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2020-12-21 22:48:01,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174051658] [2020-12-21 22:48:01,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:48:01,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:48:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:48:01,214 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 40 states. [2020-12-21 22:48:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:01,502 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2020-12-21 22:48:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:48:01,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2020-12-21 22:48:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:01,504 INFO L225 Difference]: With dead ends: 260 [2020-12-21 22:48:01,504 INFO L226 Difference]: Without dead ends: 198 [2020-12-21 22:48:01,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:48:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-21 22:48:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 116. [2020-12-21 22:48:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:48:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-12-21 22:48:01,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2020-12-21 22:48:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:01,514 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-12-21 22:48:01,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:48:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-12-21 22:48:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 22:48:01,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:01,515 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:01,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:01,729 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1240768364, now seen corresponding path program 18 times [2020-12-21 22:48:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:01,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108937762] [2020-12-21 22:48:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-12-21 22:48:02,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108937762] [2020-12-21 22:48:02,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945147185] [2020-12-21 22:48:02,357 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 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 [2020-12-21 22:48:04,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-21 22:48:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 22:48:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-12-21 22:48:04,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:04,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-21 22:48:04,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411096557] [2020-12-21 22:48:04,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 22:48:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 22:48:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 22:48:04,510 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 39 states. [2020-12-21 22:48:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:05,350 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-12-21 22:48:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 22:48:05,351 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-21 22:48:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:05,352 INFO L225 Difference]: With dead ends: 193 [2020-12-21 22:48:05,352 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 22:48:05,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:48:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 22:48:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2020-12-21 22:48:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 22:48:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-12-21 22:48:05,360 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2020-12-21 22:48:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:05,360 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-12-21 22:48:05,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 22:48:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-12-21 22:48:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 22:48:05,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:05,361 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:05,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:48:05,575 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 528635727, now seen corresponding path program 19 times [2020-12-21 22:48:05,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:05,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544187537] [2020-12-21 22:48:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-21 22:48:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544187537] [2020-12-21 22:48:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815752126] [2020-12-21 22:48:06,193 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 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 [2020-12-21 22:48:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 22:48:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-21 22:48:07,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:07,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2020-12-21 22:48:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11191736] [2020-12-21 22:48:07,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 22:48:07,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:07,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 22:48:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:48:07,852 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 54 states. [2020-12-21 22:48:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:07,997 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2020-12-21 22:48:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:48:07,997 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2020-12-21 22:48:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:07,998 INFO L225 Difference]: With dead ends: 196 [2020-12-21 22:48:07,998 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:48:08,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:48:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:48:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-21 22:48:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:48:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-12-21 22:48:08,007 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2020-12-21 22:48:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:08,007 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-12-21 22:48:08,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 22:48:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-12-21 22:48:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 22:48:08,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:08,008 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:08,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:08,221 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -763103791, now seen corresponding path program 20 times [2020-12-21 22:48:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:08,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713990447] [2020-12-21 22:48:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-21 22:48:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713990447] [2020-12-21 22:48:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862569252] [2020-12-21 22:48:08,899 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 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 [2020-12-21 22:48:09,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:48:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:48:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-21 22:48:10,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:10,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-21 22:48:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281640564] [2020-12-21 22:48:10,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 22:48:10,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 22:48:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 22:48:10,627 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 56 states. [2020-12-21 22:48:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:10,790 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-12-21 22:48:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 22:48:10,791 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 124 [2020-12-21 22:48:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:10,792 INFO L225 Difference]: With dead ends: 198 [2020-12-21 22:48:10,792 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 22:48:10,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 22:48:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 22:48:10,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 22:48:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 22:48:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-12-21 22:48:10,802 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2020-12-21 22:48:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:10,802 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-12-21 22:48:10,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 22:48:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-12-21 22:48:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 22:48:10,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:10,803 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:11,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 22:48:11,018 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash -879232045, now seen corresponding path program 21 times [2020-12-21 22:48:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:11,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270650533] [2020-12-21 22:48:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-21 22:48:11,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270650533] [2020-12-21 22:48:11,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725294802] [2020-12-21 22:48:11,807 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 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 [2020-12-21 22:48:12,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 22:48:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:48:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2020-12-21 22:48:12,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2020-12-21 22:48:12,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889675740] [2020-12-21 22:48:12,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 22:48:12,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 22:48:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 22:48:12,651 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 45 states. [2020-12-21 22:48:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:13,009 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2020-12-21 22:48:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 22:48:13,010 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 126 [2020-12-21 22:48:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:13,011 INFO L225 Difference]: With dead ends: 284 [2020-12-21 22:48:13,011 INFO L226 Difference]: Without dead ends: 214 [2020-12-21 22:48:13,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 22:48:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-21 22:48:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2020-12-21 22:48:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 22:48:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-21 22:48:13,021 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2020-12-21 22:48:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:13,021 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-21 22:48:13,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 22:48:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-21 22:48:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:48:13,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:13,022 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 15, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:13,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:13,238 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash -935507031, now seen corresponding path program 22 times [2020-12-21 22:48:13,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:13,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763306683] [2020-12-21 22:48:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2020-12-21 22:48:14,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763306683] [2020-12-21 22:48:14,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056659510] [2020-12-21 22:48:14,043 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 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 [2020-12-21 22:48:14,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:48:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:48:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-21 22:48:14,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:14,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2020-12-21 22:48:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106122256] [2020-12-21 22:48:14,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:48:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:48:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:48:14,853 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 47 states. [2020-12-21 22:48:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:15,250 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2020-12-21 22:48:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:48:15,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 131 [2020-12-21 22:48:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:15,252 INFO L225 Difference]: With dead ends: 299 [2020-12-21 22:48:15,252 INFO L226 Difference]: Without dead ends: 226 [2020-12-21 22:48:15,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:48:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-21 22:48:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2020-12-21 22:48:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:48:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-21 22:48:15,262 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2020-12-21 22:48:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:15,262 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-21 22:48:15,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:48:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-21 22:48:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 22:48:15,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:15,264 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:15,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 22:48:15,479 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -739810217, now seen corresponding path program 23 times [2020-12-21 22:48:15,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:15,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783340003] [2020-12-21 22:48:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2020-12-21 22:48:16,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783340003] [2020-12-21 22:48:16,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873602680] [2020-12-21 22:48:16,329 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 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 [2020-12-21 22:48:17,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-21 22:48:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:17,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:48:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2020-12-21 22:48:17,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:17,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2020-12-21 22:48:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842803839] [2020-12-21 22:48:17,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 22:48:17,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 22:48:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 22:48:17,976 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 49 states. [2020-12-21 22:48:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:18,366 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2020-12-21 22:48:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 22:48:18,366 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 136 [2020-12-21 22:48:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:18,368 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:48:18,368 INFO L226 Difference]: Without dead ends: 238 [2020-12-21 22:48:18,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 22:48:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-21 22:48:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2020-12-21 22:48:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:48:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-12-21 22:48:18,379 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2020-12-21 22:48:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:18,379 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-12-21 22:48:18,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 22:48:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-12-21 22:48:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 22:48:18,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:18,380 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:18,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:18,593 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1877634853, now seen corresponding path program 24 times [2020-12-21 22:48:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:18,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526149805] [2020-12-21 22:48:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2020-12-21 22:48:19,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526149805] [2020-12-21 22:48:19,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487518620] [2020-12-21 22:48:19,483 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 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 [2020-12-21 22:48:21,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-21 22:48:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-21 22:48:21,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 86 proven. 469 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-21 22:48:22,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:22,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24] total 54 [2020-12-21 22:48:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711140902] [2020-12-21 22:48:22,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 22:48:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 22:48:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2077, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:48:22,146 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 54 states. [2020-12-21 22:48:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:23,486 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2020-12-21 22:48:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-21 22:48:23,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-12-21 22:48:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:23,488 INFO L225 Difference]: With dead ends: 234 [2020-12-21 22:48:23,488 INFO L226 Difference]: Without dead ends: 155 [2020-12-21 22:48:23,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=916, Invalid=3776, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:48:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-21 22:48:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-12-21 22:48:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 22:48:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2020-12-21 22:48:23,501 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 141 [2020-12-21 22:48:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:23,501 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2020-12-21 22:48:23,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 22:48:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2020-12-21 22:48:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 22:48:23,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:23,502 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:23,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 22:48:23,716 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:23,716 INFO L82 PathProgramCache]: Analyzing trace with hash -954155808, now seen corresponding path program 25 times [2020-12-21 22:48:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:23,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828318392] [2020-12-21 22:48:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 22:48:24,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828318392] [2020-12-21 22:48:24,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210203443] [2020-12-21 22:48:24,736 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 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 [2020-12-21 22:48:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:48:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 22:48:27,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:27,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-21 22:48:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615192061] [2020-12-21 22:48:27,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 22:48:27,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 22:48:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:48:27,344 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 68 states. [2020-12-21 22:48:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:27,542 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-12-21 22:48:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 22:48:27,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 150 [2020-12-21 22:48:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:27,544 INFO L225 Difference]: With dead ends: 238 [2020-12-21 22:48:27,544 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 22:48:27,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:48:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 22:48:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-21 22:48:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 22:48:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2020-12-21 22:48:27,555 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2020-12-21 22:48:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:27,555 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2020-12-21 22:48:27,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 22:48:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2020-12-21 22:48:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-21 22:48:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:27,556 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:27,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:48:27,772 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 674980962, now seen corresponding path program 26 times [2020-12-21 22:48:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782511775] [2020-12-21 22:48:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 22:48:28,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782511775] [2020-12-21 22:48:28,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454517212] [2020-12-21 22:48:28,889 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 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 [2020-12-21 22:48:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:48:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:29,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:48:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 22:48:31,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:31,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2020-12-21 22:48:31,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528040108] [2020-12-21 22:48:31,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-21 22:48:31,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:31,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-21 22:48:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 22:48:31,682 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 70 states. [2020-12-21 22:48:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:31,877 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2020-12-21 22:48:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:48:31,877 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 152 [2020-12-21 22:48:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:31,878 INFO L225 Difference]: With dead ends: 240 [2020-12-21 22:48:31,879 INFO L226 Difference]: Without dead ends: 156 [2020-12-21 22:48:31,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 22:48:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-21 22:48:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-21 22:48:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 22:48:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-12-21 22:48:31,891 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2020-12-21 22:48:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:31,891 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-12-21 22:48:31,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-21 22:48:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-12-21 22:48:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-21 22:48:31,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:31,892 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:32,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:48:32,106 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:32,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1387646108, now seen corresponding path program 27 times [2020-12-21 22:48:32,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:32,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749092550] [2020-12-21 22:48:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 22:48:33,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749092550] [2020-12-21 22:48:33,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529613359] [2020-12-21 22:48:33,263 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 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 [2020-12-21 22:48:33,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-21 22:48:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:33,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:48:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-12-21 22:48:34,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:34,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20] total 55 [2020-12-21 22:48:34,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193247764] [2020-12-21 22:48:34,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 22:48:34,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 22:48:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:48:34,473 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 55 states. [2020-12-21 22:48:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:34,968 INFO L93 Difference]: Finished difference Result 340 states and 345 transitions. [2020-12-21 22:48:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-21 22:48:34,968 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 154 [2020-12-21 22:48:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:34,970 INFO L225 Difference]: With dead ends: 340 [2020-12-21 22:48:34,970 INFO L226 Difference]: Without dead ends: 256 [2020-12-21 22:48:34,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:48:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-21 22:48:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 160. [2020-12-21 22:48:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:48:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-12-21 22:48:34,982 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2020-12-21 22:48:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:34,982 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-12-21 22:48:34,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 22:48:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-12-21 22:48:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 22:48:34,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:34,984 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 18, 18, 18, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:35,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:48:35,197 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1495693730, now seen corresponding path program 28 times [2020-12-21 22:48:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:35,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350787451] [2020-12-21 22:48:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2020-12-21 22:48:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350787451] [2020-12-21 22:48:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145426866] [2020-12-21 22:48:36,441 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 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 [2020-12-21 22:48:36,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:48:36,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:36,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:48:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2020-12-21 22:48:37,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:37,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21] total 57 [2020-12-21 22:48:37,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393239624] [2020-12-21 22:48:37,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-21 22:48:37,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-21 22:48:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 22:48:37,544 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 57 states. [2020-12-21 22:48:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:38,125 INFO L93 Difference]: Finished difference Result 355 states and 360 transitions. [2020-12-21 22:48:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-21 22:48:38,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 159 [2020-12-21 22:48:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:38,129 INFO L225 Difference]: With dead ends: 355 [2020-12-21 22:48:38,129 INFO L226 Difference]: Without dead ends: 268 [2020-12-21 22:48:38,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 22:48:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-21 22:48:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2020-12-21 22:48:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:48:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2020-12-21 22:48:38,141 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 159 [2020-12-21 22:48:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:38,142 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2020-12-21 22:48:38,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-21 22:48:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2020-12-21 22:48:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-21 22:48:38,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:38,143 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 19, 19, 19, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:38,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:48:38,358 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1539323032, now seen corresponding path program 29 times [2020-12-21 22:48:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:38,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646602149] [2020-12-21 22:48:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2020-12-21 22:48:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646602149] [2020-12-21 22:48:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868557501] [2020-12-21 22:48:39,655 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 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 [2020-12-21 22:48:53,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-21 22:48:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:48:53,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2020-12-21 22:48:54,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:54,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 59 [2020-12-21 22:48:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655099902] [2020-12-21 22:48:54,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-21 22:48:54,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-21 22:48:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2020-12-21 22:48:54,251 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 59 states. [2020-12-21 22:48:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:54,868 INFO L93 Difference]: Finished difference Result 370 states and 375 transitions. [2020-12-21 22:48:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-21 22:48:54,869 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 164 [2020-12-21 22:48:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:54,871 INFO L225 Difference]: With dead ends: 370 [2020-12-21 22:48:54,871 INFO L226 Difference]: Without dead ends: 280 [2020-12-21 22:48:54,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2020-12-21 22:48:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-21 22:48:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 170. [2020-12-21 22:48:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-21 22:48:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-12-21 22:48:54,886 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 164 [2020-12-21 22:48:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:54,886 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-12-21 22:48:54,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-21 22:48:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-12-21 22:48:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-21 22:48:54,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:54,887 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 20, 20, 20, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:55,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:48:55,102 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1789425062, now seen corresponding path program 30 times [2020-12-21 22:48:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:55,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53830130] [2020-12-21 22:48:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-21 22:48:56,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53830130] [2020-12-21 22:48:56,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489994184] [2020-12-21 22:48:56,504 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 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 [2020-12-21 22:49:13,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-21 22:49:13,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 22:49:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2020-12-21 22:49:14,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:14,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2020-12-21 22:49:14,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912253333] [2020-12-21 22:49:14,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 22:49:14,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 22:49:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=2148, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:49:14,698 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 55 states. [2020-12-21 22:49:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:16,255 INFO L93 Difference]: Finished difference Result 275 states and 280 transitions. [2020-12-21 22:49:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-21 22:49:16,255 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 169 [2020-12-21 22:49:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:16,256 INFO L225 Difference]: With dead ends: 275 [2020-12-21 22:49:16,256 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 22:49:16,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=837, Invalid=2469, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:49:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 22:49:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2020-12-21 22:49:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 22:49:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-12-21 22:49:16,269 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 169 [2020-12-21 22:49:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:16,269 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-12-21 22:49:16,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 22:49:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-12-21 22:49:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 22:49:16,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:16,270 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:16,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-21 22:49:16,485 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash 698926025, now seen corresponding path program 31 times [2020-12-21 22:49:16,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:16,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937104736] [2020-12-21 22:49:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 22:49:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937104736] [2020-12-21 22:49:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750930371] [2020-12-21 22:49:17,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:49:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 22:49:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 22:49:21,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:21,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2020-12-21 22:49:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237813866] [2020-12-21 22:49:21,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-21 22:49:21,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-21 22:49:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 22:49:21,437 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 80 states. [2020-12-21 22:49:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:21,645 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2020-12-21 22:49:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 22:49:21,645 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 176 [2020-12-21 22:49:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:21,646 INFO L225 Difference]: With dead ends: 278 [2020-12-21 22:49:21,647 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 22:49:21,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 22:49:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 22:49:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-21 22:49:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 22:49:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-12-21 22:49:21,660 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2020-12-21 22:49:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:21,660 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-12-21 22:49:21,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-21 22:49:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-12-21 22:49:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-21 22:49:21,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:21,662 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:21,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:21,877 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash -77910837, now seen corresponding path program 32 times [2020-12-21 22:49:21,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:21,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410781578] [2020-12-21 22:49:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 22:49:23,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410781578] [2020-12-21 22:49:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797543267] [2020-12-21 22:49:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:49:23,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:49:23,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 22:49:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 22:49:27,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:27,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2020-12-21 22:49:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384345826] [2020-12-21 22:49:27,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-21 22:49:27,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:27,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-21 22:49:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2020-12-21 22:49:27,164 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 82 states. [2020-12-21 22:49:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:27,398 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2020-12-21 22:49:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:49:27,398 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 178 [2020-12-21 22:49:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:27,399 INFO L225 Difference]: With dead ends: 280 [2020-12-21 22:49:27,400 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 22:49:27,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2020-12-21 22:49:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 22:49:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-21 22:49:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-21 22:49:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2020-12-21 22:49:27,415 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2020-12-21 22:49:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:27,416 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2020-12-21 22:49:27,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-21 22:49:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2020-12-21 22:49:27,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-21 22:49:27,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:27,417 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:27,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:27,631 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash 706174285, now seen corresponding path program 33 times [2020-12-21 22:49:27,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:27,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033950183] [2020-12-21 22:49:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 22:49:29,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033950183] [2020-12-21 22:49:29,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184773984] [2020-12-21 22:49:29,199 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 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 [2020-12-21 22:49:29,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 22:49:29,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:49:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2020-12-21 22:49:31,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2020-12-21 22:49:31,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430684615] [2020-12-21 22:49:31,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-21 22:49:31,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:31,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-21 22:49:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 22:49:31,043 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 64 states. [2020-12-21 22:49:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:31,728 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2020-12-21 22:49:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-21 22:49:31,729 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 180 [2020-12-21 22:49:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:31,731 INFO L225 Difference]: With dead ends: 394 [2020-12-21 22:49:31,731 INFO L226 Difference]: Without dead ends: 296 [2020-12-21 22:49:31,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 22:49:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-21 22:49:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 186. [2020-12-21 22:49:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-21 22:49:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-12-21 22:49:31,746 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 180 [2020-12-21 22:49:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:31,746 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-12-21 22:49:31,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-21 22:49:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-12-21 22:49:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-21 22:49:31,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:31,747 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:31,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:31,963 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 262194479, now seen corresponding path program 34 times [2020-12-21 22:49:31,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:31,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985562178] [2020-12-21 22:49:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2020-12-21 22:49:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985562178] [2020-12-21 22:49:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492626778] [2020-12-21 22:49:33,601 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 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 [2020-12-21 22:49:33,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:49:33,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:49:33,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2020-12-21 22:49:35,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:35,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2020-12-21 22:49:35,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361447108] [2020-12-21 22:49:35,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 22:49:35,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:35,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 22:49:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 22:49:35,116 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 66 states. [2020-12-21 22:49:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:35,841 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2020-12-21 22:49:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 22:49:35,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 185 [2020-12-21 22:49:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:35,844 INFO L225 Difference]: With dead ends: 409 [2020-12-21 22:49:35,844 INFO L226 Difference]: Without dead ends: 308 [2020-12-21 22:49:35,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 22:49:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-21 22:49:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 191. [2020-12-21 22:49:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-21 22:49:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-12-21 22:49:35,859 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2020-12-21 22:49:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:35,860 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-12-21 22:49:35,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-21 22:49:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-12-21 22:49:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-21 22:49:35,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:35,861 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:36,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 22:49:36,075 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2065965231, now seen corresponding path program 35 times [2020-12-21 22:49:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:36,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402242682] [2020-12-21 22:49:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2020-12-21 22:49:37,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402242682] [2020-12-21 22:49:37,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116839638] [2020-12-21 22:49:37,861 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 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 [2020-12-21 22:49:48,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-21 22:49:48,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:49:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2020-12-21 22:49:50,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:50,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25] total 68 [2020-12-21 22:49:50,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618075175] [2020-12-21 22:49:50,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 22:49:50,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:50,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 22:49:50,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:49:50,286 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 68 states. [2020-12-21 22:49:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:50,852 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2020-12-21 22:49:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:49:50,853 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 190 [2020-12-21 22:49:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:50,854 INFO L225 Difference]: With dead ends: 424 [2020-12-21 22:49:50,855 INFO L226 Difference]: Without dead ends: 320 [2020-12-21 22:49:50,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:49:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-21 22:49:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2020-12-21 22:49:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-21 22:49:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-12-21 22:49:50,869 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2020-12-21 22:49:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:50,869 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-12-21 22:49:50,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 22:49:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-12-21 22:49:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-21 22:49:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:50,871 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 23, 23, 23, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:51,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:51,072 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1135574827, now seen corresponding path program 36 times [2020-12-21 22:49:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648071087] [2020-12-21 22:49:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2020-12-21 22:49:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648071087] [2020-12-21 22:49:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345056398] [2020-12-21 22:49:52,950 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 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 [2020-12-21 22:50:09,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2020-12-21 22:50:09,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:50:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-21 22:50:09,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2020-12-21 22:50:10,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:10,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2020-12-21 22:50:10,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584802243] [2020-12-21 22:50:10,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-21 22:50:10,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-21 22:50:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-12-21 22:50:10,967 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 67 states. [2020-12-21 22:50:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:15,884 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2020-12-21 22:50:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-21 22:50:15,885 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2020-12-21 22:50:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:15,886 INFO L225 Difference]: With dead ends: 315 [2020-12-21 22:50:15,886 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 22:50:15,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3213, Invalid=9897, Unknown=0, NotChecked=0, Total=13110 [2020-12-21 22:50:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 22:50:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-12-21 22:50:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-21 22:50:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-12-21 22:50:15,898 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 195 [2020-12-21 22:50:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:15,899 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-12-21 22:50:15,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-21 22:50:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-12-21 22:50:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-21 22:50:15,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:15,900 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:16,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:50:16,101 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash -90608872, now seen corresponding path program 37 times [2020-12-21 22:50:16,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636389691] [2020-12-21 22:50:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-21 22:50:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636389691] [2020-12-21 22:50:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441569859] [2020-12-21 22:50:18,113 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 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 [2020-12-21 22:50:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 22:50:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-21 22:50:23,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:23,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2020-12-21 22:50:23,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19132146] [2020-12-21 22:50:23,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-21 22:50:23,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-21 22:50:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:50:23,092 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 92 states. [2020-12-21 22:50:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:23,386 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2020-12-21 22:50:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:50:23,387 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 202 [2020-12-21 22:50:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:23,388 INFO L225 Difference]: With dead ends: 318 [2020-12-21 22:50:23,389 INFO L226 Difference]: Without dead ends: 206 [2020-12-21 22:50:23,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:50:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-21 22:50:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-12-21 22:50:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-21 22:50:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2020-12-21 22:50:23,404 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2020-12-21 22:50:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:23,404 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2020-12-21 22:50:23,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-21 22:50:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2020-12-21 22:50:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-21 22:50:23,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:23,406 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:23,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 22:50:23,621 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -464734822, now seen corresponding path program 38 times [2020-12-21 22:50:23,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:23,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254716207] [2020-12-21 22:50:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-21 22:50:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254716207] [2020-12-21 22:50:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023227389] [2020-12-21 22:50:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:50:25,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:50:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:50:25,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-21 22:50:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-21 22:50:30,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:30,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2020-12-21 22:50:30,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075161883] [2020-12-21 22:50:30,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-21 22:50:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-21 22:50:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2020-12-21 22:50:30,829 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 94 states. [2020-12-21 22:50:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:31,134 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2020-12-21 22:50:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 22:50:31,135 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 204 [2020-12-21 22:50:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:31,136 INFO L225 Difference]: With dead ends: 320 [2020-12-21 22:50:31,136 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 22:50:31,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2020-12-21 22:50:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 22:50:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-21 22:50:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-21 22:50:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2020-12-21 22:50:31,149 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2020-12-21 22:50:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:31,150 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2020-12-21 22:50:31,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-21 22:50:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2020-12-21 22:50:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-21 22:50:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:31,151 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:31,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 22:50:31,366 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash 777480092, now seen corresponding path program 39 times [2020-12-21 22:50:31,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:31,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444067555] [2020-12-21 22:50:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-21 22:50:33,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444067555] [2020-12-21 22:50:33,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467040018] [2020-12-21 22:50:33,540 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 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 [2020-12-21 22:50:34,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-21 22:50:34,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:50:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:50:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2020-12-21 22:50:36,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:36,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26] total 73 [2020-12-21 22:50:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534629788] [2020-12-21 22:50:36,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-21 22:50:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-21 22:50:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 22:50:36,672 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 73 states. [2020-12-21 22:50:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:37,522 INFO L93 Difference]: Finished difference Result 448 states and 453 transitions. [2020-12-21 22:50:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-21 22:50:37,522 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 206 [2020-12-21 22:50:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:37,525 INFO L225 Difference]: With dead ends: 448 [2020-12-21 22:50:37,526 INFO L226 Difference]: Without dead ends: 336 [2020-12-21 22:50:37,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 22:50:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-21 22:50:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2020-12-21 22:50:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-21 22:50:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2020-12-21 22:50:37,544 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2020-12-21 22:50:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:37,545 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2020-12-21 22:50:37,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-21 22:50:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2020-12-21 22:50:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-21 22:50:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:37,546 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 24, 24, 24, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 22:50:37,760 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -26444698, now seen corresponding path program 40 times [2020-12-21 22:50:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:37,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48400726] [2020-12-21 22:50:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2020-12-21 22:50:40,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48400726] [2020-12-21 22:50:40,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826948549] [2020-12-21 22:50:40,178 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 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 [2020-12-21 22:50:40,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:50:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:50:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:50:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2020-12-21 22:50:42,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:42,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2020-12-21 22:50:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145493759] [2020-12-21 22:50:42,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-21 22:50:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-21 22:50:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 22:50:42,161 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 75 states. [2020-12-21 22:50:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:43,039 INFO L93 Difference]: Finished difference Result 463 states and 468 transitions. [2020-12-21 22:50:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-21 22:50:43,040 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 211 [2020-12-21 22:50:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:43,042 INFO L225 Difference]: With dead ends: 463 [2020-12-21 22:50:43,042 INFO L226 Difference]: Without dead ends: 348 [2020-12-21 22:50:43,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 22:50:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-21 22:50:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2020-12-21 22:50:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-21 22:50:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-12-21 22:50:43,060 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 211 [2020-12-21 22:50:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:43,060 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-12-21 22:50:43,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-21 22:50:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-12-21 22:50:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 22:50:43,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:43,062 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:43,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:50:43,276 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:43,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1995828320, now seen corresponding path program 41 times [2020-12-21 22:50:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:43,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018820520] [2020-12-21 22:50:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2020-12-21 22:50:45,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018820520] [2020-12-21 22:50:45,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959901911] [2020-12-21 22:50:45,695 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 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 [2020-12-21 22:51:09,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-21 22:51:09,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:51:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:51:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:51:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2020-12-21 22:51:11,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:51:11,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2020-12-21 22:51:11,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718183613] [2020-12-21 22:51:11,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-21 22:51:11,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:51:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-21 22:51:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 22:51:11,191 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 77 states. [2020-12-21 22:51:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:51:12,147 INFO L93 Difference]: Finished difference Result 478 states and 483 transitions. [2020-12-21 22:51:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-21 22:51:12,148 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 216 [2020-12-21 22:51:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:51:12,150 INFO L225 Difference]: With dead ends: 478 [2020-12-21 22:51:12,150 INFO L226 Difference]: Without dead ends: 360 [2020-12-21 22:51:12,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 22:51:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-21 22:51:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 222. [2020-12-21 22:51:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-21 22:51:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-12-21 22:51:12,167 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2020-12-21 22:51:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:51:12,167 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-12-21 22:51:12,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-21 22:51:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-12-21 22:51:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 22:51:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:51:12,169 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:51:12,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:51:12,384 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:51:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:51:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1098077086, now seen corresponding path program 42 times [2020-12-21 22:51:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:51:12,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816606510] [2020-12-21 22:51:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:51:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:51:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2020-12-21 22:51:14,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816606510] [2020-12-21 22:51:14,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182947563] [2020-12-21 22:51:14,906 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 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