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/Problem12_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 02:37:00,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 02:37:00,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 02:37:00,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 02:37:00,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 02:37:00,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 02:37:00,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 02:37:00,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 02:37:00,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 02:37:00,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 02:37:00,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 02:37:00,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 02:37:00,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 02:37:00,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 02:37:00,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 02:37:00,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 02:37:00,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 02:37:00,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 02:37:00,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 02:37:00,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 02:37:00,097 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 [2019-10-07 02:37:00,126 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 02:37:00,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 02:37:00,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 02:37:00,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 02:37:00,128 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 02:37:00,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 02:37:00,128 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 02:37:00,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 02:37:00,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 02:37:00,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 02:37:00,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 02:37:00,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 02:37:00,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 02:37:00,129 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 02:37:00,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 02:37:00,130 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 02:37:00,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 02:37:00,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 02:37:00,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 02:37:00,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 02:37:00,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 02:37:00,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 02:37:00,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 02:37:00,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 02:37:00,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 02:37:00,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 02:37:00,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 02:37:00,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 02:37:00,132 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 [2019-10-07 02:37:00,425 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 02:37:00,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 02:37:00,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 02:37:00,453 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 02:37:00,453 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 02:37:00,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-07 02:37:00,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2361ca19d/23b25762acf14b7d9fa879f002faf341/FLAG54cde2398 [2019-10-07 02:37:01,359 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 02:37:01,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-07 02:37:01,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2361ca19d/23b25762acf14b7d9fa879f002faf341/FLAG54cde2398 [2019-10-07 02:37:01,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2361ca19d/23b25762acf14b7d9fa879f002faf341 [2019-10-07 02:37:01,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 02:37:01,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 02:37:01,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 02:37:01,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 02:37:01,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 02:37:01,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:37:01" (1/1) ... [2019-10-07 02:37:01,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419573bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:01, skipping insertion in model container [2019-10-07 02:37:01,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:37:01" (1/1) ... [2019-10-07 02:37:01,933 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 02:37:02,116 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 02:37:03,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:37:03,946 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 02:37:04,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:37:04,642 INFO L192 MainTranslator]: Completed translation [2019-10-07 02:37:04,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04 WrapperNode [2019-10-07 02:37:04,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 02:37:04,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 02:37:04,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 02:37:04,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 02:37:04,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (1/1) ... [2019-10-07 02:37:04,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 02:37:04,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 02:37:04,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 02:37:04,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 02:37:04,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (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 [2019-10-07 02:37:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 02:37:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 02:37:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 02:37:05,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 02:37:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 02:37:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-07 02:37:05,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 02:37:05,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 02:37:05,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 02:37:05,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 02:37:05,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-07 02:37:05,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 02:37:05,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 02:37:05,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 02:37:05,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 02:37:05,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 02:37:05,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 02:37:12,049 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 02:37:12,050 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 02:37:12,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:37:12 BoogieIcfgContainer [2019-10-07 02:37:12,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 02:37:12,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 02:37:12,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 02:37:12,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 02:37:12,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:37:01" (1/3) ... [2019-10-07 02:37:12,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599294b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:37:12, skipping insertion in model container [2019-10-07 02:37:12,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:37:04" (2/3) ... [2019-10-07 02:37:12,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599294b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:37:12, skipping insertion in model container [2019-10-07 02:37:12,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:37:12" (3/3) ... [2019-10-07 02:37:12,061 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2019-10-07 02:37:12,071 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 02:37:12,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 02:37:12,093 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 02:37:12,127 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 02:37:12,128 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 02:37:12,128 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 02:37:12,128 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 02:37:12,128 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 02:37:12,128 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 02:37:12,128 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 02:37:12,129 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 02:37:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-07 02:37:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 02:37:12,169 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:12,171 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:37:12,172 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -874903474, now seen corresponding path program 1 times [2019-10-07 02:37:12,188 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:12,188 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:12,189 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:12,189 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:37:12,569 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:12,570 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:37:12,570 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 02:37:12,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 02:37:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 02:37:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 02:37:12,593 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-07 02:37:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:17,497 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-07 02:37:17,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 02:37:17,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 02:37:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:17,533 INFO L225 Difference]: With dead ends: 2068 [2019-10-07 02:37:17,533 INFO L226 Difference]: Without dead ends: 1371 [2019-10-07 02:37:17,544 INFO L606 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 [2019-10-07 02:37:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-07 02:37:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357. [2019-10-07 02:37:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1357 states. [2019-10-07 02:37:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions. [2019-10-07 02:37:17,690 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11 [2019-10-07 02:37:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:17,690 INFO L462 AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions. [2019-10-07 02:37:17,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 02:37:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions. [2019-10-07 02:37:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-07 02:37:17,693 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:17,693 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:37:17,694 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash 600043375, now seen corresponding path program 1 times [2019-10-07 02:37:17,695 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:17,695 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:17,695 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:17,696 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:37:17,841 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:17,842 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:37:17,842 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 02:37:17,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:37:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:37:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 02:37:17,847 INFO L87 Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand 5 states. [2019-10-07 02:37:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:24,498 INFO L93 Difference]: Finished difference Result 4103 states and 7818 transitions. [2019-10-07 02:37:24,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:37:24,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-10-07 02:37:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:24,527 INFO L225 Difference]: With dead ends: 4103 [2019-10-07 02:37:24,527 INFO L226 Difference]: Without dead ends: 2751 [2019-10-07 02:37:24,536 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 02:37:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2019-10-07 02:37:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2739. [2019-10-07 02:37:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-07 02:37:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4960 transitions. [2019-10-07 02:37:24,669 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4960 transitions. Word has length 25 [2019-10-07 02:37:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:24,669 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 4960 transitions. [2019-10-07 02:37:24,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:37:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4960 transitions. [2019-10-07 02:37:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-07 02:37:24,671 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:24,672 INFO L385 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] [2019-10-07 02:37:24,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1719281653, now seen corresponding path program 1 times [2019-10-07 02:37:24,673 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:24,674 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:24,675 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:24,675 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:37:24,804 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:24,805 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:37:24,806 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 02:37:24,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 02:37:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 02:37:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 02:37:24,809 INFO L87 Difference]: Start difference. First operand 2739 states and 4960 transitions. Second operand 4 states. [2019-10-07 02:37:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:32,789 INFO L93 Difference]: Finished difference Result 9592 states and 17478 transitions. [2019-10-07 02:37:32,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 02:37:32,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-07 02:37:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:32,834 INFO L225 Difference]: With dead ends: 9592 [2019-10-07 02:37:32,834 INFO L226 Difference]: Without dead ends: 6858 [2019-10-07 02:37:32,844 INFO L606 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 [2019-10-07 02:37:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2019-10-07 02:37:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6834. [2019-10-07 02:37:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6834 states. [2019-10-07 02:37:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 11780 transitions. [2019-10-07 02:37:33,095 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 11780 transitions. Word has length 27 [2019-10-07 02:37:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:33,095 INFO L462 AbstractCegarLoop]: Abstraction has 6834 states and 11780 transitions. [2019-10-07 02:37:33,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 02:37:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 11780 transitions. [2019-10-07 02:37:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-07 02:37:33,097 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:33,098 INFO L385 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] [2019-10-07 02:37:33,098 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:33,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2114190881, now seen corresponding path program 1 times [2019-10-07 02:37:33,099 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:33,099 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:33,099 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:33,099 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:37:33,195 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:33,195 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:37:33,196 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:37:33,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:37:33,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:37:33,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:37:33,198 INFO L87 Difference]: Start difference. First operand 6834 states and 11780 transitions. Second operand 6 states. [2019-10-07 02:37:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:39,521 INFO L93 Difference]: Finished difference Result 14558 states and 25489 transitions. [2019-10-07 02:37:39,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:37:39,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-07 02:37:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:39,563 INFO L225 Difference]: With dead ends: 14558 [2019-10-07 02:37:39,563 INFO L226 Difference]: Without dead ends: 7729 [2019-10-07 02:37:39,582 INFO L606 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 [2019-10-07 02:37:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7729 states. [2019-10-07 02:37:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7729 to 7699. [2019-10-07 02:37:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7699 states. [2019-10-07 02:37:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 13156 transitions. [2019-10-07 02:37:39,812 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 13156 transitions. Word has length 33 [2019-10-07 02:37:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:39,813 INFO L462 AbstractCegarLoop]: Abstraction has 7699 states and 13156 transitions. [2019-10-07 02:37:39,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:37:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 13156 transitions. [2019-10-07 02:37:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-07 02:37:39,821 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:39,821 INFO L385 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] [2019-10-07 02:37:39,822 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1648655127, now seen corresponding path program 1 times [2019-10-07 02:37:39,822 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:39,823 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:39,823 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:39,823 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:37:39,959 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:39,960 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:37:39,960 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 02:37:39,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:37:39,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:37:39,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 02:37:39,961 INFO L87 Difference]: Start difference. First operand 7699 states and 13156 transitions. Second operand 5 states. [2019-10-07 02:37:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:47,156 INFO L93 Difference]: Finished difference Result 21999 states and 38627 transitions. [2019-10-07 02:37:47,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 02:37:47,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-07 02:37:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:47,232 INFO L225 Difference]: With dead ends: 21999 [2019-10-07 02:37:47,232 INFO L226 Difference]: Without dead ends: 14305 [2019-10-07 02:37:47,261 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:37:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2019-10-07 02:37:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 12143. [2019-10-07 02:37:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12143 states. [2019-10-07 02:37:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12143 states to 12143 states and 19836 transitions. [2019-10-07 02:37:47,691 INFO L78 Accepts]: Start accepts. Automaton has 12143 states and 19836 transitions. Word has length 37 [2019-10-07 02:37:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:47,691 INFO L462 AbstractCegarLoop]: Abstraction has 12143 states and 19836 transitions. [2019-10-07 02:37:47,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:37:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12143 states and 19836 transitions. [2019-10-07 02:37:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-07 02:37:47,697 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:47,697 INFO L385 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, 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] [2019-10-07 02:37:47,698 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2049669345, now seen corresponding path program 1 times [2019-10-07 02:37:47,698 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:47,699 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:47,699 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:47,699 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 02:37:47,849 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:47,849 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:37:47,850 INFO L95 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 [2019-10-07 02:37:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:47,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 02:37:47,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:37:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 02:37:48,078 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:37:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 02:37:48,161 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 02:37:48,161 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 02:37:48,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:37:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:37:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 02:37:48,163 INFO L87 Difference]: Start difference. First operand 12143 states and 19836 transitions. Second operand 5 states. [2019-10-07 02:37:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:37:55,290 INFO L93 Difference]: Finished difference Result 35185 states and 60846 transitions. [2019-10-07 02:37:55,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:37:55,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2019-10-07 02:37:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:37:55,445 INFO L225 Difference]: With dead ends: 35185 [2019-10-07 02:37:55,446 INFO L226 Difference]: Without dead ends: 23047 [2019-10-07 02:37:55,492 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-07 02:37:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23047 states. [2019-10-07 02:37:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23047 to 22792. [2019-10-07 02:37:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22792 states. [2019-10-07 02:37:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22792 states to 22792 states and 35722 transitions. [2019-10-07 02:37:56,234 INFO L78 Accepts]: Start accepts. Automaton has 22792 states and 35722 transitions. Word has length 80 [2019-10-07 02:37:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:37:56,235 INFO L462 AbstractCegarLoop]: Abstraction has 22792 states and 35722 transitions. [2019-10-07 02:37:56,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:37:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 22792 states and 35722 transitions. [2019-10-07 02:37:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 02:37:56,246 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:37:56,246 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:37:56,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:37:56,453 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:37:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:37:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1020764348, now seen corresponding path program 1 times [2019-10-07 02:37:56,456 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:37:56,456 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:56,456 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:56,456 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:37:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:37:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 02:37:57,593 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:37:57,593 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:37:57,593 INFO L95 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 [2019-10-07 02:37:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:37:57,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 02:37:57,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:37:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 02:37:57,772 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:37:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 02:37:57,889 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 02:37:57,932 INFO L162 IcfgInterpreter]: Started Sifa with 50 locations of interest [2019-10-07 02:37:57,932 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 02:37:57,942 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 02:37:57,955 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 02:37:57,956 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 02:37:58,258 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-10-07 02:37:58,442 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-10-07 02:37:58,826 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-10-07 02:37:59,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:37:59,418 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 02:37:59,426 INFO L168 Benchmark]: Toolchain (without parser) took 57510.56 ms. Allocated memory was 136.8 MB in the beginning and 967.3 MB in the end (delta: 830.5 MB). Free memory was 87.7 MB in the beginning and 505.9 MB in the end (delta: -418.1 MB). Peak memory consumption was 412.3 MB. Max. memory is 7.1 GB. [2019-10-07 02:37:59,426 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 02:37:59,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2727.75 ms. Allocated memory was 136.8 MB in the beginning and 260.6 MB in the end (delta: 123.7 MB). Free memory was 87.7 MB in the beginning and 180.7 MB in the end (delta: -92.9 MB). Peak memory consumption was 118.8 MB. Max. memory is 7.1 GB. [2019-10-07 02:37:59,428 INFO L168 Benchmark]: Boogie Preprocessor took 298.01 ms. Allocated memory is still 260.6 MB. Free memory was 180.7 MB in the beginning and 152.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2019-10-07 02:37:59,429 INFO L168 Benchmark]: RCFGBuilder took 7110.60 ms. Allocated memory was 260.6 MB in the beginning and 422.6 MB in the end (delta: 162.0 MB). Free memory was 152.3 MB in the beginning and 83.3 MB in the end (delta: 69.0 MB). Peak memory consumption was 246.3 MB. Max. memory is 7.1 GB. [2019-10-07 02:37:59,430 INFO L168 Benchmark]: TraceAbstraction took 47369.11 ms. Allocated memory was 422.6 MB in the beginning and 967.3 MB in the end (delta: 544.7 MB). Free memory was 83.3 MB in the beginning and 505.9 MB in the end (delta: -422.5 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. [2019-10-07 02:37:59,434 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2727.75 ms. Allocated memory was 136.8 MB in the beginning and 260.6 MB in the end (delta: 123.7 MB). Free memory was 87.7 MB in the beginning and 180.7 MB in the end (delta: -92.9 MB). Peak memory consumption was 118.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 298.01 ms. Allocated memory is still 260.6 MB. Free memory was 180.7 MB in the beginning and 152.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7110.60 ms. Allocated memory was 260.6 MB in the beginning and 422.6 MB in the end (delta: 162.0 MB). Free memory was 152.3 MB in the beginning and 83.3 MB in the end (delta: 69.0 MB). Peak memory consumption was 246.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 47369.11 ms. Allocated memory was 422.6 MB in the beginning and 967.3 MB in the end (delta: 544.7 MB). Free memory was 83.3 MB in the beginning and 505.9 MB in the end (delta: -422.5 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...