/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:15,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:15,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:15,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:08:15,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:08:15,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:08:15,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:08:15,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:08:15,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:08:15,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:08:15,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:08:15,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:08:15,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:08:15,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:08:15,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:08:15,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:08:15,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:08:15,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:15,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:15,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:15,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:08:15,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:15,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:15,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:15,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:15,616 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:15,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:15,617 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:15,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:15,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:15,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:15,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:15,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:15,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:15,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:15,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:15,619 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:15,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:15,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:15,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:15,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:15,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:15,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:15,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:15,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:15,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:15,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:15,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:15,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:15,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:15,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:15,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:15,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:15,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:15,912 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:15,913 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-11-06 19:08:15,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d202e591f/0312e475c80f497599635014c6e4e5d2/FLAG0f3ac6b35 [2019-11-06 19:08:16,575 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:16,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label16.c [2019-11-06 19:08:16,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d202e591f/0312e475c80f497599635014c6e4e5d2/FLAG0f3ac6b35 [2019-11-06 19:08:16,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d202e591f/0312e475c80f497599635014c6e4e5d2 [2019-11-06 19:08:16,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:16,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:16,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:16,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:16,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:16,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:16" (1/1) ... [2019-11-06 19:08:16,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed7df85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:16, skipping insertion in model container [2019-11-06 19:08:16,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:16" (1/1) ... [2019-11-06 19:08:16,801 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:16,860 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:17,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:17,526 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:17,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:17,703 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:17,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17 WrapperNode [2019-11-06 19:08:17,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:17,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:17,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:17,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:17,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (1/1) ... [2019-11-06 19:08:17,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:17,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:17,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:17,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:17,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (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 [2019-11-06 19:08:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:17,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:17,961 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:17,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:19,880 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:19,881 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:19,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:19 BoogieIcfgContainer [2019-11-06 19:08:19,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:19,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:19,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:19,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:19,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:16" (1/3) ... [2019-11-06 19:08:19,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcb224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:19, skipping insertion in model container [2019-11-06 19:08:19,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:17" (2/3) ... [2019-11-06 19:08:19,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcb224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:19, skipping insertion in model container [2019-11-06 19:08:19,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:19" (3/3) ... [2019-11-06 19:08:19,891 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label16.c [2019-11-06 19:08:19,902 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:19,910 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:19,922 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:19,952 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:19,952 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:19,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:19,953 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:19,953 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:19,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:19,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:19,954 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 19:08:19,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:19,994 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:19,996 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -467621694, now seen corresponding path program 1 times [2019-11-06 19:08:20,013 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:20,013 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931442662] [2019-11-06 19:08:20,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:20,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931442662] [2019-11-06 19:08:20,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:20,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728909688] [2019-11-06 19:08:20,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:20,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:20,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:20,459 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:23,723 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-11-06 19:08:23,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:23,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-11-06 19:08:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:23,755 INFO L225 Difference]: With dead ends: 993 [2019-11-06 19:08:23,756 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 19:08:23,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 19:08:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-11-06 19:08:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 19:08:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-11-06 19:08:23,879 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 49 [2019-11-06 19:08:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:23,881 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-11-06 19:08:23,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-11-06 19:08:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 19:08:23,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:23,897 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:23,897 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2099265230, now seen corresponding path program 1 times [2019-11-06 19:08:23,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:23,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964669404] [2019-11-06 19:08:23,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:24,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964669404] [2019-11-06 19:08:24,256 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:24,256 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:24,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147365395] [2019-11-06 19:08:24,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:24,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:24,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:24,263 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-11-06 19:08:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:26,980 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-11-06 19:08:26,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:26,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-11-06 19:08:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:26,991 INFO L225 Difference]: With dead ends: 1873 [2019-11-06 19:08:26,991 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 19:08:26,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 19:08:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-11-06 19:08:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-11-06 19:08:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-11-06 19:08:27,064 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 129 [2019-11-06 19:08:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:27,067 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-11-06 19:08:27,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-11-06 19:08:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 19:08:27,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:27,084 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:27,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2045537286, now seen corresponding path program 1 times [2019-11-06 19:08:27,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:27,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241525301] [2019-11-06 19:08:27,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:27,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241525301] [2019-11-06 19:08:27,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538512296] [2019-11-06 19:08:27,418 INFO L94 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 [2019-11-06 19:08:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:27,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:27,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:27,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:27,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633550355] [2019-11-06 19:08:27,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:27,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:27,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:27,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:27,677 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-11-06 19:08:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:28,806 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-11-06 19:08:28,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:28,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2019-11-06 19:08:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:28,834 INFO L225 Difference]: With dead ends: 3612 [2019-11-06 19:08:28,834 INFO L226 Difference]: Without dead ends: 2392 [2019-11-06 19:08:28,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-11-06 19:08:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-11-06 19:08:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-11-06 19:08:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-11-06 19:08:28,949 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 180 [2019-11-06 19:08:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:28,951 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-11-06 19:08:28,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-11-06 19:08:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-06 19:08:28,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:28,963 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:29,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:29,168 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1976797618, now seen corresponding path program 1 times [2019-11-06 19:08:29,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:29,169 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171144859] [2019-11-06 19:08:29,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:08:29,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171144859] [2019-11-06 19:08:29,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879469198] [2019-11-06 19:08:29,592 INFO L94 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 [2019-11-06 19:08:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:08:29,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 19:08:29,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:29,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:08:29,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912176857] [2019-11-06 19:08:29,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:29,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:29,803 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-11-06 19:08:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:31,378 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-11-06 19:08:31,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:31,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2019-11-06 19:08:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:31,405 INFO L225 Difference]: With dead ends: 5406 [2019-11-06 19:08:31,405 INFO L226 Difference]: Without dead ends: 3223 [2019-11-06 19:08:31,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-11-06 19:08:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-11-06 19:08:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-11-06 19:08:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4269 transitions. [2019-11-06 19:08:31,495 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4269 transitions. Word has length 215 [2019-11-06 19:08:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:31,495 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4269 transitions. [2019-11-06 19:08:31,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4269 transitions. [2019-11-06 19:08:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:08:31,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:31,501 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:31,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:31,706 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1368554123, now seen corresponding path program 1 times [2019-11-06 19:08:31,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:31,708 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228974895] [2019-11-06 19:08:31,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:32,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228974895] [2019-11-06 19:08:32,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580913336] [2019-11-06 19:08:32,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:32,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:32,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:32,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:32,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-11-06 19:08:32,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393014350] [2019-11-06 19:08:32,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:08:32,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:08:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:08:32,442 INFO L87 Difference]: Start difference. First operand 3183 states and 4269 transitions. Second operand 9 states. [2019-11-06 19:08:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:34,871 INFO L93 Difference]: Finished difference Result 7976 states and 11384 transitions. [2019-11-06 19:08:34,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:08:34,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 224 [2019-11-06 19:08:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:34,901 INFO L225 Difference]: With dead ends: 7976 [2019-11-06 19:08:34,902 INFO L226 Difference]: Without dead ends: 4987 [2019-11-06 19:08:34,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2019-11-06 19:08:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4932. [2019-11-06 19:08:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4932 states. [2019-11-06 19:08:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 6422 transitions. [2019-11-06 19:08:35,090 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 6422 transitions. Word has length 224 [2019-11-06 19:08:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:35,091 INFO L462 AbstractCegarLoop]: Abstraction has 4932 states and 6422 transitions. [2019-11-06 19:08:35,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:08:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 6422 transitions. [2019-11-06 19:08:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-11-06 19:08:35,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:35,109 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:35,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:35,315 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1712123571, now seen corresponding path program 1 times [2019-11-06 19:08:35,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:35,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143531710] [2019-11-06 19:08:35,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:08:35,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143531710] [2019-11-06 19:08:35,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795354491] [2019-11-06 19:08:35,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:36,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 19:08:36,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:08:36,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:36,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2019-11-06 19:08:36,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085717917] [2019-11-06 19:08:36,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:08:36,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:08:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:36,251 INFO L87 Difference]: Start difference. First operand 4932 states and 6422 transitions. Second operand 13 states. [2019-11-06 19:08:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:46,035 INFO L93 Difference]: Finished difference Result 18150 states and 28085 transitions. [2019-11-06 19:08:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-06 19:08:46,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 294 [2019-11-06 19:08:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:46,146 INFO L225 Difference]: With dead ends: 18150 [2019-11-06 19:08:46,147 INFO L226 Difference]: Without dead ends: 13412 [2019-11-06 19:08:46,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 19:08:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13412 states. [2019-11-06 19:08:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13412 to 12832. [2019-11-06 19:08:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12832 states. [2019-11-06 19:08:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12832 states to 12832 states and 16901 transitions. [2019-11-06 19:08:46,660 INFO L78 Accepts]: Start accepts. Automaton has 12832 states and 16901 transitions. Word has length 294 [2019-11-06 19:08:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:46,661 INFO L462 AbstractCegarLoop]: Abstraction has 12832 states and 16901 transitions. [2019-11-06 19:08:46,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:08:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12832 states and 16901 transitions. [2019-11-06 19:08:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-11-06 19:08:46,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:46,693 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:46,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:46,898 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1754946104, now seen corresponding path program 1 times [2019-11-06 19:08:46,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:46,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598669260] [2019-11-06 19:08:46,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:08:47,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598669260] [2019-11-06 19:08:47,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686315005] [2019-11-06 19:08:47,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:08:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:47,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-06 19:08:47,710 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:47,710 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:08:47,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589493590] [2019-11-06 19:08:47,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:08:47,712 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:47,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:08:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:47,712 INFO L87 Difference]: Start difference. First operand 12832 states and 16901 transitions. Second operand 11 states. [2019-11-06 19:08:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:51,350 INFO L93 Difference]: Finished difference Result 27792 states and 37246 transitions. [2019-11-06 19:08:51,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 19:08:51,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 392 [2019-11-06 19:08:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:51,413 INFO L225 Difference]: With dead ends: 27792 [2019-11-06 19:08:51,413 INFO L226 Difference]: Without dead ends: 16310 [2019-11-06 19:08:51,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:08:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16310 states. [2019-11-06 19:08:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16310 to 15074. [2019-11-06 19:08:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15074 states. [2019-11-06 19:08:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15074 states to 15074 states and 19664 transitions. [2019-11-06 19:08:52,503 INFO L78 Accepts]: Start accepts. Automaton has 15074 states and 19664 transitions. Word has length 392 [2019-11-06 19:08:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:52,504 INFO L462 AbstractCegarLoop]: Abstraction has 15074 states and 19664 transitions. [2019-11-06 19:08:52,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:08:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15074 states and 19664 transitions. [2019-11-06 19:08:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2019-11-06 19:08:52,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:52,545 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:52,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:52,750 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1282030757, now seen corresponding path program 1 times [2019-11-06 19:08:52,751 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:52,751 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175726828] [2019-11-06 19:08:52,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 182 proven. 4 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2019-11-06 19:08:53,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175726828] [2019-11-06 19:08:53,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842246436] [2019-11-06 19:08:53,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:08:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:08:53,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 469 proven. 82 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2019-11-06 19:08:53,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:53,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 19:08:53,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85752774] [2019-11-06 19:08:53,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:08:53,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:08:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:53,761 INFO L87 Difference]: Start difference. First operand 15074 states and 19664 transitions. Second operand 7 states.