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/Problem01_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:59,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:59,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:59,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:38:59,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:59,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:59,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:59,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:59,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:59,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:59,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:59,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:59,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:59,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:59,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:59,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:59,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:38:59,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:59,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:59,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:59,749 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 01:38:59,763 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:59,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:59,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:59,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:59,765 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:59,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:59,766 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:59,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:59,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:59,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:59,768 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:59,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:59,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:59,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:59,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:59,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:59,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:59,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:59,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:59,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:59,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:59,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:59,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:59,770 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 01:39:00,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:39:00,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:39:00,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:39:00,071 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:39:00,071 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:39:00,072 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-15 01:39:00,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f4b1292/3ec64a1dcd0a4e1bb3f4f9929b72030c/FLAG18f5171c1 [2019-10-15 01:39:00,685 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:39:00,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-15 01:39:00,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f4b1292/3ec64a1dcd0a4e1bb3f4f9929b72030c/FLAG18f5171c1 [2019-10-15 01:39:00,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f4b1292/3ec64a1dcd0a4e1bb3f4f9929b72030c [2019-10-15 01:39:00,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:39:00,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:39:00,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:00,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:39:00,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:39:00,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:00" (1/1) ... [2019-10-15 01:39:00,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:00, skipping insertion in model container [2019-10-15 01:39:00,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:00" (1/1) ... [2019-10-15 01:39:00,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:39:01,053 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:39:01,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:01,688 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:39:01,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:01,816 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:39:01,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01 WrapperNode [2019-10-15 01:39:01,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:01,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:39:01,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:39:01,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:39:01,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (1/1) ... [2019-10-15 01:39:01,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:39:01,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:39:01,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:39:01,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:39:01,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (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 01:39:02,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:39:02,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:39:02,019 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:39:02,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:39:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:39:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:39:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:39:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:39:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:39:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:39:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:39:03,898 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:39:03,899 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:39:03,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:03 BoogieIcfgContainer [2019-10-15 01:39:03,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:39:03,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:39:03,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:39:03,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:39:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:39:00" (1/3) ... [2019-10-15 01:39:03,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e134bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:03, skipping insertion in model container [2019-10-15 01:39:03,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:01" (2/3) ... [2019-10-15 01:39:03,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e134bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:03, skipping insertion in model container [2019-10-15 01:39:03,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:03" (3/3) ... [2019-10-15 01:39:03,909 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2019-10-15 01:39:03,919 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:39:03,928 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:39:03,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:39:03,965 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:39:03,965 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:39:03,965 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:39:03,965 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:39:03,965 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:39:03,966 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:39:03,966 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:39:03,966 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:39:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:39:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:39:03,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:03,998 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] [2019-10-15 01:39:04,000 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:04,006 INFO L82 PathProgramCache]: Analyzing trace with hash 826813922, now seen corresponding path program 1 times [2019-10-15 01:39:04,015 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:04,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742301116] [2019-10-15 01:39:04,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:04,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:04,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:04,483 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 01:39:04,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742301116] [2019-10-15 01:39:04,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:04,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:04,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387445568] [2019-10-15 01:39:04,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:04,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:04,515 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:39:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:05,014 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:39:05,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:05,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:39:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:05,034 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:39:05,034 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:39:05,039 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 01:39:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:39:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:39:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:39:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2019-10-15 01:39:05,143 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2019-10-15 01:39:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:05,145 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2019-10-15 01:39:05,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2019-10-15 01:39:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:39:05,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:05,155 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:05,155 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1195672711, now seen corresponding path program 1 times [2019-10-15 01:39:05,158 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:05,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376578034] [2019-10-15 01:39:05,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:05,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:05,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:05,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376578034] [2019-10-15 01:39:05,352 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:05,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:39:05,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596502378] [2019-10-15 01:39:05,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:39:05,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:39:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:39:05,356 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand 6 states. [2019-10-15 01:39:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:05,961 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2019-10-15 01:39:05,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:39:05,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-10-15 01:39:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:05,967 INFO L225 Difference]: With dead ends: 402 [2019-10-15 01:39:05,967 INFO L226 Difference]: Without dead ends: 250 [2019-10-15 01:39:05,969 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 01:39:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-15 01:39:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2019-10-15 01:39:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-15 01:39:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2019-10-15 01:39:05,992 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2019-10-15 01:39:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:05,992 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2019-10-15 01:39:05,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:39:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2019-10-15 01:39:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:39:05,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:05,995 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:05,996 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2128694315, now seen corresponding path program 1 times [2019-10-15 01:39:05,996 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:05,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770708313] [2019-10-15 01:39:05,997 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:05,997 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:05,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:06,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770708313] [2019-10-15 01:39:06,083 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:06,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:06,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475867491] [2019-10-15 01:39:06,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:06,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:06,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:06,085 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand 3 states. [2019-10-15 01:39:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:06,484 INFO L93 Difference]: Finished difference Result 700 states and 1240 transitions. [2019-10-15 01:39:06,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:06,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-15 01:39:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:06,491 INFO L225 Difference]: With dead ends: 700 [2019-10-15 01:39:06,492 INFO L226 Difference]: Without dead ends: 467 [2019-10-15 01:39:06,494 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 01:39:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-10-15 01:39:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2019-10-15 01:39:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-15 01:39:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 799 transitions. [2019-10-15 01:39:06,534 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 799 transitions. Word has length 88 [2019-10-15 01:39:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:06,535 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 799 transitions. [2019-10-15 01:39:06,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 799 transitions. [2019-10-15 01:39:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:39:06,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:06,541 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:06,541 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash 579788873, now seen corresponding path program 1 times [2019-10-15 01:39:06,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:06,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809758607] [2019-10-15 01:39:06,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:06,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:06,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809758607] [2019-10-15 01:39:06,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:06,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:06,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267501843] [2019-10-15 01:39:06,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:06,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:06,641 INFO L87 Difference]: Start difference. First operand 467 states and 799 transitions. Second operand 3 states. [2019-10-15 01:39:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:07,117 INFO L93 Difference]: Finished difference Result 1310 states and 2339 transitions. [2019-10-15 01:39:07,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:07,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:39:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:07,131 INFO L225 Difference]: With dead ends: 1310 [2019-10-15 01:39:07,131 INFO L226 Difference]: Without dead ends: 848 [2019-10-15 01:39:07,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 01:39:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-10-15 01:39:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2019-10-15 01:39:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-10-15 01:39:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1398 transitions. [2019-10-15 01:39:07,203 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1398 transitions. Word has length 94 [2019-10-15 01:39:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:07,204 INFO L462 AbstractCegarLoop]: Abstraction has 848 states and 1398 transitions. [2019-10-15 01:39:07,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1398 transitions. [2019-10-15 01:39:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:39:07,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:07,244 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:39:07,244 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1929504678, now seen corresponding path program 1 times [2019-10-15 01:39:07,245 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:07,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573209950] [2019-10-15 01:39:07,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:07,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:07,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:07,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573209950] [2019-10-15 01:39:07,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090024065] [2019-10-15 01:39:07,337 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 01:39:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:07,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:39:07,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:39:07,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:39:07,592 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:39:07,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:39:07,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259518390] [2019-10-15 01:39:07,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:07,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:39:07,594 INFO L87 Difference]: Start difference. First operand 848 states and 1398 transitions. Second operand 3 states. [2019-10-15 01:39:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:08,003 INFO L93 Difference]: Finished difference Result 2378 states and 4057 transitions. [2019-10-15 01:39:08,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:08,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-10-15 01:39:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:08,075 INFO L225 Difference]: With dead ends: 2378 [2019-10-15 01:39:08,076 INFO L226 Difference]: Without dead ends: 1535 [2019-10-15 01:39:08,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:39:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2019-10-15 01:39:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2019-10-15 01:39:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2019-10-15 01:39:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2507 transitions. [2019-10-15 01:39:08,170 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2507 transitions. Word has length 113 [2019-10-15 01:39:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:08,170 INFO L462 AbstractCegarLoop]: Abstraction has 1535 states and 2507 transitions. [2019-10-15 01:39:08,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2507 transitions. [2019-10-15 01:39:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:39:08,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:08,180 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:08,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:08,386 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 719784990, now seen corresponding path program 1 times [2019-10-15 01:39:08,387 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:08,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137955831] [2019-10-15 01:39:08,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:08,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:08,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:08,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137955831] [2019-10-15 01:39:08,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989214275] [2019-10-15 01:39:08,493 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 01:39:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:08,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:39:08,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:08,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:08,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087812844] [2019-10-15 01:39:08,771 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:39:08,772 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:08,778 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:08,786 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:08,787 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:09,041 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 102 for LOIs [2019-10-15 01:39:11,150 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 142 for LOIs [2019-10-15 01:39:11,653 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:11,766 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:11,902 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:39:12,249 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2019-10-15 01:39:12,424 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:12,579 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2019-10-15 01:39:12,842 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:13,230 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:13,357 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:13,513 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-15 01:39:13,892 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:39:14,338 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2019-10-15 01:39:14,888 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-15 01:39:15,093 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2019-10-15 01:39:16,827 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:39:17,322 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-10-15 01:39:17,646 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:20,087 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 147 [2019-10-15 01:39:20,199 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-10-15 01:39:21,031 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-10-15 01:39:21,351 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-10-15 01:39:22,880 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2019-10-15 01:39:31,172 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-15 01:39:32,117 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 179688 conjuctions. This might take some time...