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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:32,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:32,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:32,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:32,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:32,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:32,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:32,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:32,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:32,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:32,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:32,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:32,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:32,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:32,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:32,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:32,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:32,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:32,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:32,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:32,933 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 01:54:32,953 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:32,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:32,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:32,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:32,955 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:32,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:32,956 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:32,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:32,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:32,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:32,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:32,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:32,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:32,958 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:32,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:32,959 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:32,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:32,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:32,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:32,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:32,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:32,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:32,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:32,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:32,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:32,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:32,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:32,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:32,962 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 01:54:33,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:33,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:33,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:33,271 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:33,272 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:33,273 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-10-15 01:54:33,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5a895fd/2872384a53444311b042a9dd33cc01c1/FLAG66b7f6c16 [2019-10-15 01:54:33,968 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:33,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-10-15 01:54:33,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5a895fd/2872384a53444311b042a9dd33cc01c1/FLAG66b7f6c16 [2019-10-15 01:54:34,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5a895fd/2872384a53444311b042a9dd33cc01c1 [2019-10-15 01:54:34,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:34,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:34,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:34,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:34,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:34,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:34" (1/1) ... [2019-10-15 01:54:34,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ea241b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:34, skipping insertion in model container [2019-10-15 01:54:34,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:34" (1/1) ... [2019-10-15 01:54:34,226 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:34,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:35,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:35,155 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:35,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:35,691 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:35,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35 WrapperNode [2019-10-15 01:54:35,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:35,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:35,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:35,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:35,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (1/1) ... [2019-10-15 01:54:35,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:35,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:35,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:35,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:35,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (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 01:54:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:35,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:35,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:35,988 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:35,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:35,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:35,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:47,629 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:47,629 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:47,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:47 BoogieIcfgContainer [2019-10-15 01:54:47,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:47,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:47,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:47,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:47,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:34" (1/3) ... [2019-10-15 01:54:47,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660479fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:47, skipping insertion in model container [2019-10-15 01:54:47,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:35" (2/3) ... [2019-10-15 01:54:47,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660479fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:47, skipping insertion in model container [2019-10-15 01:54:47,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:47" (3/3) ... [2019-10-15 01:54:47,639 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2019-10-15 01:54:47,649 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:47,657 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:47,668 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:47,695 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:47,696 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:47,696 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:47,696 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:47,696 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:47,696 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:47,696 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:47,697 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:47,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:47,727 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:47,729 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash 648055405, now seen corresponding path program 1 times [2019-10-15 01:54:47,743 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:47,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360065670] [2019-10-15 01:54:47,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:47,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:47,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:47,960 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 01:54:47,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360065670] [2019-10-15 01:54:47,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:47,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:47,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453969712] [2019-10-15 01:54:47,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:47,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:47,985 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:52,851 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:52,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:52,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:52,876 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:52,877 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:52,885 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 01:54:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 691. [2019-10-15 01:54:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-15 01:54:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1133 transitions. [2019-10-15 01:54:52,990 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1133 transitions. Word has length 11 [2019-10-15 01:54:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:52,991 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1133 transitions. [2019-10-15 01:54:52,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1133 transitions. [2019-10-15 01:54:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:52,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:52,994 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 01:54:52,994 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 975475452, now seen corresponding path program 1 times [2019-10-15 01:54:52,995 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:52,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046869989] [2019-10-15 01:54:52,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:52,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:52,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,125 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 01:54:53,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046869989] [2019-10-15 01:54:53,126 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:53,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:53,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729358482] [2019-10-15 01:54:53,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:53,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:53,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:53,132 INFO L87 Difference]: Start difference. First operand 691 states and 1133 transitions. Second operand 4 states. [2019-10-15 01:54:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:56,933 INFO L93 Difference]: Finished difference Result 2743 states and 4570 transitions. [2019-10-15 01:54:56,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:56,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:54:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:56,950 INFO L225 Difference]: With dead ends: 2743 [2019-10-15 01:54:56,950 INFO L226 Difference]: Without dead ends: 2057 [2019-10-15 01:54:56,953 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 01:54:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2019-10-15 01:54:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2050. [2019-10-15 01:54:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2050 states. [2019-10-15 01:54:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 2991 transitions. [2019-10-15 01:54:57,024 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 2991 transitions. Word has length 21 [2019-10-15 01:54:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:57,025 INFO L462 AbstractCegarLoop]: Abstraction has 2050 states and 2991 transitions. [2019-10-15 01:54:57,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 2991 transitions. [2019-10-15 01:54:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 01:54:57,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:57,028 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:54:57,028 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash 245259110, now seen corresponding path program 1 times [2019-10-15 01:54:57,029 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:57,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741580580] [2019-10-15 01:54:57,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:54:57,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741580580] [2019-10-15 01:54:57,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760089229] [2019-10-15 01:54:57,240 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 01:54:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:57,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:54:57,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:54:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:54:57,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:54:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:54:57,547 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:54:57,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-15 01:54:57,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277034240] [2019-10-15 01:54:57,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:54:57,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:54:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:54:57,549 INFO L87 Difference]: Start difference. First operand 2050 states and 2991 transitions. Second operand 5 states. [2019-10-15 01:55:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:00,492 INFO L93 Difference]: Finished difference Result 5484 states and 8290 transitions. [2019-10-15 01:55:00,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:55:00,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-15 01:55:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:00,512 INFO L225 Difference]: With dead ends: 5484 [2019-10-15 01:55:00,513 INFO L226 Difference]: Without dead ends: 3439 [2019-10-15 01:55:00,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:55:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2019-10-15 01:55:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 2779. [2019-10-15 01:55:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2779 states. [2019-10-15 01:55:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3901 transitions. [2019-10-15 01:55:00,615 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3901 transitions. Word has length 71 [2019-10-15 01:55:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:00,615 INFO L462 AbstractCegarLoop]: Abstraction has 2779 states and 3901 transitions. [2019-10-15 01:55:00,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3901 transitions. [2019-10-15 01:55:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-15 01:55:00,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:00,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:00,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:00,847 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1444759826, now seen corresponding path program 1 times [2019-10-15 01:55:00,849 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:00,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914627881] [2019-10-15 01:55:00,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:00,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:00,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:01,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914627881] [2019-10-15 01:55:01,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672643106] [2019-10-15 01:55:01,157 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 01:55:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:01,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:01,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:01,435 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:01,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461452941] [2019-10-15 01:55:01,598 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:01,598 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:01,605 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:01,613 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:01,614 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:01,764 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:02,007 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-15 01:55:02,615 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9356 conjuctions. This might take some time... [2019-10-15 01:55:02,725 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-15 01:55:03,147 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9356 conjuctions. This might take some time... [2019-10-15 01:55:04,296 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:04,490 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-15 01:55:04,491 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59