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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:17,728 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:17,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:17,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:17,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:17,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:17,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:17,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:17,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:17,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:17,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:17,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:17,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:17,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:17,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:17,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:17,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:17,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:17,816 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 [2019-10-15 01:43:17,850 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:17,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:17,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:17,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:17,855 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:17,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:17,856 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:17,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:17,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:17,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:17,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:17,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:17,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:17,860 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:17,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:17,860 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:17,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:17,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:17,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:17,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:17,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:17,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:17,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:17,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:17,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:17,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:17,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:17,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:17,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:43:18,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:18,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:18,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:18,199 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:18,200 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:18,200 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-10-15 01:43:18,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7057885a9/15846e3897ed4453855bfa7c8295ee99/FLAGf8b43dec7 [2019-10-15 01:43:18,859 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:18,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-10-15 01:43:18,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7057885a9/15846e3897ed4453855bfa7c8295ee99/FLAGf8b43dec7 [2019-10-15 01:43:19,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7057885a9/15846e3897ed4453855bfa7c8295ee99 [2019-10-15 01:43:19,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:19,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:19,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:19,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:19,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:19,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2439b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19, skipping insertion in model container [2019-10-15 01:43:19,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:19,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:19,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:19,666 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:19,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:19,838 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:19,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19 WrapperNode [2019-10-15 01:43:19,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:19,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:19,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:19,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:19,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (1/1) ... [2019-10-15 01:43:19,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:19,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:19,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:19,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:19,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (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 [2019-10-15 01:43:20,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:20,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:20,014 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:20,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:22,099 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:22,099 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:22,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:22 BoogieIcfgContainer [2019-10-15 01:43:22,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:22,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:22,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:22,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:22,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:19" (1/3) ... [2019-10-15 01:43:22,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4308f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:22, skipping insertion in model container [2019-10-15 01:43:22,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:19" (2/3) ... [2019-10-15 01:43:22,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4308f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:22, skipping insertion in model container [2019-10-15 01:43:22,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:22" (3/3) ... [2019-10-15 01:43:22,119 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label59.c [2019-10-15 01:43:22,131 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:22,144 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:22,155 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:22,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:22,189 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:22,190 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:22,190 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:22,190 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:22,190 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:22,190 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:22,191 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:43:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:43:22,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:22,235 INFO L380 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, 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] [2019-10-15 01:43:22,237 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:22,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash -219460263, now seen corresponding path program 1 times [2019-10-15 01:43:22,249 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:22,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88803331] [2019-10-15 01:43:22,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:22,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:22,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:22,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88803331] [2019-10-15 01:43:22,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:22,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:22,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607885622] [2019-10-15 01:43:22,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:22,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:22,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:22,793 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:43:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:23,424 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:43:23,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:23,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:43:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:23,441 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:43:23,441 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:43:23,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:43:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:43:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:43:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:43:23,517 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:43:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:23,518 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:43:23,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:43:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:43:23,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:23,524 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-10-15 01:43:23,525 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash -701995042, now seen corresponding path program 1 times [2019-10-15 01:43:23,526 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:23,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056146969] [2019-10-15 01:43:23,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:23,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:23,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:23,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056146969] [2019-10-15 01:43:23,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:23,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:23,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68778025] [2019-10-15 01:43:23,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:23,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:23,654 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:43:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:24,132 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:43:24,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:24,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:43:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:24,144 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:43:24,144 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:43:24,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:43:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:43:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:43:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 415 transitions. [2019-10-15 01:43:24,193 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 415 transitions. Word has length 94 [2019-10-15 01:43:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:24,193 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 415 transitions. [2019-10-15 01:43:24,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 415 transitions. [2019-10-15 01:43:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 01:43:24,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:24,201 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:43:24,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2133153300, now seen corresponding path program 1 times [2019-10-15 01:43:24,203 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:24,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510455107] [2019-10-15 01:43:24,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:24,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:24,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:24,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510455107] [2019-10-15 01:43:24,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333683264] [2019-10-15 01:43:24,432 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 [2019-10-15 01:43:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:24,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:24,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:24,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:24,667 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:24,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 01:43:24,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306009442] [2019-10-15 01:43:24,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:43:24,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:43:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:24,673 INFO L87 Difference]: Start difference. First operand 259 states and 415 transitions. Second operand 4 states. [2019-10-15 01:43:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:25,517 INFO L93 Difference]: Finished difference Result 1017 states and 1697 transitions. [2019-10-15 01:43:25,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:43:25,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-15 01:43:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:25,524 INFO L225 Difference]: With dead ends: 1017 [2019-10-15 01:43:25,524 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:43:25,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:43:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 595. [2019-10-15 01:43:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-15 01:43:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 929 transitions. [2019-10-15 01:43:25,573 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 929 transitions. Word has length 99 [2019-10-15 01:43:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:25,574 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 929 transitions. [2019-10-15 01:43:25,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:43:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 929 transitions. [2019-10-15 01:43:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:43:25,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:25,581 INFO L380 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, 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] [2019-10-15 01:43:25,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:25,791 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -217629803, now seen corresponding path program 1 times [2019-10-15 01:43:25,792 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:25,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296581138] [2019-10-15 01:43:25,793 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:25,793 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:25,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:25,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296581138] [2019-10-15 01:43:25,938 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:25,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:25,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471558071] [2019-10-15 01:43:25,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:25,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:25,940 INFO L87 Difference]: Start difference. First operand 595 states and 929 transitions. Second operand 6 states. [2019-10-15 01:43:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:26,630 INFO L93 Difference]: Finished difference Result 1747 states and 2935 transitions. [2019-10-15 01:43:26,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:26,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-10-15 01:43:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:26,644 INFO L225 Difference]: With dead ends: 1747 [2019-10-15 01:43:26,645 INFO L226 Difference]: Without dead ends: 1157 [2019-10-15 01:43:26,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-10-15 01:43:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1129. [2019-10-15 01:43:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1129 states. [2019-10-15 01:43:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1758 transitions. [2019-10-15 01:43:26,744 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1758 transitions. Word has length 118 [2019-10-15 01:43:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:26,746 INFO L462 AbstractCegarLoop]: Abstraction has 1129 states and 1758 transitions. [2019-10-15 01:43:26,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1758 transitions. [2019-10-15 01:43:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 01:43:26,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:26,754 INFO L380 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, 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] [2019-10-15 01:43:26,754 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -423602746, now seen corresponding path program 1 times [2019-10-15 01:43:26,755 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:26,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125792917] [2019-10-15 01:43:26,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:26,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:26,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:26,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125792917] [2019-10-15 01:43:26,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:26,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:26,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225653203] [2019-10-15 01:43:26,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:26,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:26,922 INFO L87 Difference]: Start difference. First operand 1129 states and 1758 transitions. Second operand 6 states. [2019-10-15 01:43:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:27,488 INFO L93 Difference]: Finished difference Result 2301 states and 3684 transitions. [2019-10-15 01:43:27,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:27,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-10-15 01:43:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:27,498 INFO L225 Difference]: With dead ends: 2301 [2019-10-15 01:43:27,498 INFO L226 Difference]: Without dead ends: 1177 [2019-10-15 01:43:27,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2019-10-15 01:43:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1153. [2019-10-15 01:43:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2019-10-15 01:43:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1719 transitions. [2019-10-15 01:43:27,555 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1719 transitions. Word has length 148 [2019-10-15 01:43:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:27,556 INFO L462 AbstractCegarLoop]: Abstraction has 1153 states and 1719 transitions. [2019-10-15 01:43:27,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1719 transitions. [2019-10-15 01:43:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:43:27,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:27,562 INFO L380 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, 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] [2019-10-15 01:43:27,562 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1279191556, now seen corresponding path program 1 times [2019-10-15 01:43:27,563 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:27,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589233227] [2019-10-15 01:43:27,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:27,564 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:27,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:27,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589233227] [2019-10-15 01:43:27,701 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:27,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:27,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741688602] [2019-10-15 01:43:27,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:27,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:27,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:27,703 INFO L87 Difference]: Start difference. First operand 1153 states and 1719 transitions. Second operand 6 states. [2019-10-15 01:43:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:28,420 INFO L93 Difference]: Finished difference Result 2355 states and 3705 transitions. [2019-10-15 01:43:28,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:43:28,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-15 01:43:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:28,430 INFO L225 Difference]: With dead ends: 2355 [2019-10-15 01:43:28,430 INFO L226 Difference]: Without dead ends: 1115 [2019-10-15 01:43:28,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-10-15 01:43:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1071. [2019-10-15 01:43:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-10-15 01:43:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1494 transitions. [2019-10-15 01:43:28,485 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1494 transitions. Word has length 157 [2019-10-15 01:43:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:28,486 INFO L462 AbstractCegarLoop]: Abstraction has 1071 states and 1494 transitions. [2019-10-15 01:43:28,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1494 transitions. [2019-10-15 01:43:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:43:28,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:28,492 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:43:28,492 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1688231143, now seen corresponding path program 1 times [2019-10-15 01:43:28,492 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:28,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336672302] [2019-10-15 01:43:28,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:28,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:28,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:28,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336672302] [2019-10-15 01:43:28,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200536862] [2019-10-15 01:43:28,611 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 [2019-10-15 01:43:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:28,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:28,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:28,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:28,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82107975] [2019-10-15 01:43:28,876 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:28,877 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:28,882 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:28,890 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:28,890 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:29,204 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:31,273 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:43:36,090 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:36,107 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:36,382 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-10-15 01:43:36,627 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:36,923 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:37,218 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:37,555 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2019-10-15 01:43:37,840 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:43:38,096 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:43:38,383 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:43:38,636 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:43:39,191 WARN L191 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2019-10-15 01:43:39,838 WARN L191 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 85 [2019-10-15 01:43:43,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:43,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 19 [2019-10-15 01:43:43,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208044519] [2019-10-15 01:43:43,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:43:43,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:43:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:43:43,716 INFO L87 Difference]: Start difference. First operand 1071 states and 1494 transitions. Second operand 19 states. [2019-10-15 01:43:44,056 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:44,420 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2019-10-15 01:43:44,845 WARN L191 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 101 [2019-10-15 01:43:45,304 WARN L191 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2019-10-15 01:43:45,653 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:46,008 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:46,247 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:46,473 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:46,672 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:43:47,235 WARN L191 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-10-15 01:43:47,519 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2019-10-15 01:43:47,861 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2019-10-15 01:43:48,271 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2019-10-15 01:43:48,611 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2019-10-15 01:43:49,358 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:49,628 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:50,669 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2019-10-15 01:43:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:53,461 INFO L93 Difference]: Finished difference Result 2904 states and 4029 transitions. [2019-10-15 01:43:53,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:43:53,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 161 [2019-10-15 01:43:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:53,471 INFO L225 Difference]: With dead ends: 2904 [2019-10-15 01:43:53,471 INFO L226 Difference]: Without dead ends: 1838 [2019-10-15 01:43:53,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 352 SyntacticMatches, 128 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:43:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2019-10-15 01:43:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1740. [2019-10-15 01:43:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1740 states. [2019-10-15 01:43:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2311 transitions. [2019-10-15 01:43:53,534 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2311 transitions. Word has length 161 [2019-10-15 01:43:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:53,535 INFO L462 AbstractCegarLoop]: Abstraction has 1740 states and 2311 transitions. [2019-10-15 01:43:53,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:43:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2311 transitions. [2019-10-15 01:43:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:43:53,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:53,543 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 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] [2019-10-15 01:43:53,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:53,748 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash -971564255, now seen corresponding path program 1 times [2019-10-15 01:43:53,749 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:53,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147256042] [2019-10-15 01:43:53,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:53,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:53,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 89 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:43:53,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147256042] [2019-10-15 01:43:53,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268621371] [2019-10-15 01:43:53,891 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 [2019-10-15 01:43:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:54,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:54,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:43:54,093 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 106 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:43:54,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518703343] [2019-10-15 01:43:54,185 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:54,186 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:54,187 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:54,187 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:54,188 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:54,325 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:55,762 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs