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/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:35,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:35,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:35,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:35,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:35,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:35,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:35,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:35,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:35,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:35,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:35,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:35,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:35,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:35,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:35,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:35,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:35,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:35,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:35,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:35,815 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 01:54:35,838 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:35,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:35,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:35,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:35,841 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:35,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:35,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:35,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:35,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:35,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:35,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:35,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:35,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:35,845 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:35,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:35,845 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:35,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:35,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:35,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:35,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:35,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:35,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:35,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:35,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:35,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:35,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:35,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:35,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:35,848 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 01:54:36,141 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:36,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:36,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:36,159 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:36,160 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:36,161 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-15 01:54:36,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42e155de/423372c186a044b28bb727d3cbcfe06a/FLAG0a3a58ea8 [2019-10-15 01:54:36,869 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:36,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-15 01:54:36,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42e155de/423372c186a044b28bb727d3cbcfe06a/FLAG0a3a58ea8 [2019-10-15 01:54:37,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42e155de/423372c186a044b28bb727d3cbcfe06a [2019-10-15 01:54:37,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:37,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:37,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:37,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:37,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:37,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:37" (1/1) ... [2019-10-15 01:54:37,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da87ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:37, skipping insertion in model container [2019-10-15 01:54:37,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:37" (1/1) ... [2019-10-15 01:54:37,091 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:37,162 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:38,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:38,054 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:38,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:38,503 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:38,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38 WrapperNode [2019-10-15 01:54:38,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:38,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:38,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:38,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:38,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:38,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:38,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:38,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:38,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (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 01:54:38,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:38,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:38,805 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:38,805 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:38,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:51,705 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:51,705 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:51,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51 BoogieIcfgContainer [2019-10-15 01:54:51,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:51,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:51,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:51,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:51,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:37" (1/3) ... [2019-10-15 01:54:51,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566e3669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38" (2/3) ... [2019-10-15 01:54:51,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566e3669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51" (3/3) ... [2019-10-15 01:54:51,724 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-10-15 01:54:51,736 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:51,746 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:51,757 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:51,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:51,794 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:51,794 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:51,794 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:51,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:51,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:51,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:51,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:51,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:51,838 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:51,841 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash 648055917, now seen corresponding path program 1 times [2019-10-15 01:54:51,858 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:51,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506664702] [2019-10-15 01:54:51,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:52,163 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 01:54:52,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506664702] [2019-10-15 01:54:52,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:52,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:52,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154823450] [2019-10-15 01:54:52,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:52,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:52,193 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:57,957 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:57,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:57,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:57,999 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:58,000 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:58,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-15 01:54:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-15 01:54:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-15 01:54:58,103 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-15 01:54:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:58,105 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-15 01:54:58,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-15 01:54:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:58,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:58,107 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:58,108 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1069434126, now seen corresponding path program 1 times [2019-10-15 01:54:58,110 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:58,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161048587] [2019-10-15 01:54:58,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:58,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:58,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:58,242 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 01:54:58,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161048587] [2019-10-15 01:54:58,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:58,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:58,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980261639] [2019-10-15 01:54:58,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:58,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:58,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:58,250 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 4 states. [2019-10-15 01:55:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:02,387 INFO L93 Difference]: Finished difference Result 1701 states and 3299 transitions. [2019-10-15 01:55:02,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:02,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:55:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:02,397 INFO L225 Difference]: With dead ends: 1701 [2019-10-15 01:55:02,397 INFO L226 Difference]: Without dead ends: 1276 [2019-10-15 01:55:02,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2019-10-15 01:55:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1249. [2019-10-15 01:55:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2019-10-15 01:55:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2090 transitions. [2019-10-15 01:55:02,466 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2090 transitions. Word has length 21 [2019-10-15 01:55:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:02,467 INFO L462 AbstractCegarLoop]: Abstraction has 1249 states and 2090 transitions. [2019-10-15 01:55:02,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2090 transitions. [2019-10-15 01:55:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:55:02,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:02,471 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] [2019-10-15 01:55:02,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1093282752, now seen corresponding path program 1 times [2019-10-15 01:55:02,472 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:02,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716612172] [2019-10-15 01:55:02,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:02,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:02,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:02,595 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 01:55:02,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716612172] [2019-10-15 01:55:02,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:02,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:02,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991795804] [2019-10-15 01:55:02,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:02,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:02,598 INFO L87 Difference]: Start difference. First operand 1249 states and 2090 transitions. Second operand 5 states. [2019-10-15 01:55:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:06,112 INFO L93 Difference]: Finished difference Result 3799 states and 6510 transitions. [2019-10-15 01:55:06,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:06,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-15 01:55:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:06,134 INFO L225 Difference]: With dead ends: 3799 [2019-10-15 01:55:06,143 INFO L226 Difference]: Without dead ends: 2555 [2019-10-15 01:55:06,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2019-10-15 01:55:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2080. [2019-10-15 01:55:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2080 states. [2019-10-15 01:55:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3141 transitions. [2019-10-15 01:55:06,242 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3141 transitions. Word has length 68 [2019-10-15 01:55:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:06,243 INFO L462 AbstractCegarLoop]: Abstraction has 2080 states and 3141 transitions. [2019-10-15 01:55:06,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3141 transitions. [2019-10-15 01:55:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-15 01:55:06,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:06,260 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:06,262 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1153846069, now seen corresponding path program 1 times [2019-10-15 01:55:06,262 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:06,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473553984] [2019-10-15 01:55:06,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:06,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:06,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 64 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:55:06,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473553984] [2019-10-15 01:55:06,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431378542] [2019-10-15 01:55:06,901 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 01:55:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:07,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:55:07,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:07,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 01:55:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:55:07,342 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:07,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,704 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2019-10-15 01:55:07,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:55:07,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:07,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-10-15 01:55:07,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409083632] [2019-10-15 01:55:07,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:07,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:07,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:55:07,991 INFO L87 Difference]: Start difference. First operand 2080 states and 3141 transitions. Second operand 5 states. [2019-10-15 01:55:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:11,491 INFO L93 Difference]: Finished difference Result 4434 states and 6674 transitions. [2019-10-15 01:55:11,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:11,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2019-10-15 01:55:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:11,512 INFO L225 Difference]: With dead ends: 4434 [2019-10-15 01:55:11,512 INFO L226 Difference]: Without dead ends: 2359 [2019-10-15 01:55:11,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 423 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:55:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2019-10-15 01:55:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2329. [2019-10-15 01:55:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2329 states. [2019-10-15 01:55:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3425 transitions. [2019-10-15 01:55:11,620 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3425 transitions. Word has length 212 [2019-10-15 01:55:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:11,623 INFO L462 AbstractCegarLoop]: Abstraction has 2329 states and 3425 transitions. [2019-10-15 01:55:11,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3425 transitions. [2019-10-15 01:55:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-15 01:55:11,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:11,630 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:11,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:11,836 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1424522606, now seen corresponding path program 1 times [2019-10-15 01:55:11,837 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:11,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275694250] [2019-10-15 01:55:11,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:11,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:11,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 129 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:55:12,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275694250] [2019-10-15 01:55:12,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530485257] [2019-10-15 01:55:12,416 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 01:55:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:12,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:55:12,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:12,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:12,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 130 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:55:12,928 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:13,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:13,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 32 proven. 133 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:55:13,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060701564] [2019-10-15 01:55:13,473 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:13,473 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:13,480 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:13,488 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:13,488 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:13,629 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs