/usr/bin/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/Problem16_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:04:14,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:04:14,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:04:15,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 02:04:15,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:04:15,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:04:15,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:04:15,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:04:15,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:04:15,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:04:15,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:04:15,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:04:15,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:04:15,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:04:15,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:04:15,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:04:15,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 02:04:15,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:04:15,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:04:15,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:04:15,063 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 [2019-11-07 02:04:15,097 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:04:15,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:04:15,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:04:15,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:04:15,102 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:04:15,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:04:15,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:04:15,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:04:15,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:04:15,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:04:15,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:04:15,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:04:15,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:04:15,106 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:04:15,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:04:15,107 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:04:15,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:04:15,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:04:15,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:04:15,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:04:15,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:04:15,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:04:15,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:04:15,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:04:15,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:04:15,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:04:15,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:04:15,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:04:15,111 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 [2019-11-07 02:04:15,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:04:15,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:04:15,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:04:15,401 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:04:15,401 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:04:15,402 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-07 02:04:15,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c10cd1f/cc8f8b0496e44bf999e43229c71a4fba/FLAG1019ee032 [2019-11-07 02:04:16,114 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:04:16,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-07 02:04:16,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c10cd1f/cc8f8b0496e44bf999e43229c71a4fba/FLAG1019ee032 [2019-11-07 02:04:16,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c10cd1f/cc8f8b0496e44bf999e43229c71a4fba [2019-11-07 02:04:16,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:04:16,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:04:16,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:04:16,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:04:16,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:04:16,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:16" (1/1) ... [2019-11-07 02:04:16,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4092cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:16, skipping insertion in model container [2019-11-07 02:04:16,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:16" (1/1) ... [2019-11-07 02:04:16,341 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:04:16,415 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:04:17,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:04:17,265 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:04:17,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:04:17,522 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:04:17,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17 WrapperNode [2019-11-07 02:04:17,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:04:17,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:04:17,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:04:17,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:04:17,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (1/1) ... [2019-11-07 02:04:17,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:04:17,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:04:17,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:04:17,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:04:17,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (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 [2019-11-07 02:04:17,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:04:17,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:04:17,798 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 02:04:17,798 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-07 02:04:17,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:04:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 02:04:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-07 02:04:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:04:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:04:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:04:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:04:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:04:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:04:26,417 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:04:26,417 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 02:04:26,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:26 BoogieIcfgContainer [2019-11-07 02:04:26,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:04:26,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:04:26,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:04:26,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:04:26,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:16" (1/3) ... [2019-11-07 02:04:26,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570901dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:26, skipping insertion in model container [2019-11-07 02:04:26,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:17" (2/3) ... [2019-11-07 02:04:26,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570901dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:26, skipping insertion in model container [2019-11-07 02:04:26,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:26" (3/3) ... [2019-11-07 02:04:26,427 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-11-07 02:04:26,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:04:26,444 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:04:26,454 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:04:26,480 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:04:26,480 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:04:26,480 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:04:26,480 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:04:26,480 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:04:26,480 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:04:26,481 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:04:26,481 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:04:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-11-07 02:04:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 02:04:26,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:26,521 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:04:26,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash 863565375, now seen corresponding path program 1 times [2019-11-07 02:04:26,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:26,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54018727] [2019-11-07 02:04:26,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:04:26,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54018727] [2019-11-07 02:04:26,860 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:04:26,860 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:04:26,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697939932] [2019-11-07 02:04:26,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:04:26,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:04:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:04:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:04:26,884 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-11-07 02:04:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:04:29,588 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-11-07 02:04:29,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:04:29,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-07 02:04:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:04:29,617 INFO L225 Difference]: With dead ends: 953 [2019-11-07 02:04:29,618 INFO L226 Difference]: Without dead ends: 702 [2019-11-07 02:04:29,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:04:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-11-07 02:04:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 463. [2019-11-07 02:04:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-11-07 02:04:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions. [2019-11-07 02:04:29,711 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11 [2019-11-07 02:04:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:04:29,711 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 876 transitions. [2019-11-07 02:04:29,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:04:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions. [2019-11-07 02:04:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 02:04:29,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:29,714 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:04:29,714 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -164671555, now seen corresponding path program 1 times [2019-11-07 02:04:29,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:29,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63594251] [2019-11-07 02:04:29,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:04:29,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63594251] [2019-11-07 02:04:29,836 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:04:29,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 02:04:29,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776253092] [2019-11-07 02:04:29,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:04:29,840 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:04:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:04:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:04:29,841 INFO L87 Difference]: Start difference. First operand 463 states and 876 transitions. Second operand 5 states. [2019-11-07 02:04:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:04:32,160 INFO L93 Difference]: Finished difference Result 1395 states and 2674 transitions. [2019-11-07 02:04:32,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:04:32,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-07 02:04:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:04:32,171 INFO L225 Difference]: With dead ends: 1395 [2019-11-07 02:04:32,171 INFO L226 Difference]: Without dead ends: 937 [2019-11-07 02:04:32,177 INFO L630 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 [2019-11-07 02:04:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-11-07 02:04:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918. [2019-11-07 02:04:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-11-07 02:04:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions. [2019-11-07 02:04:32,287 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21 [2019-11-07 02:04:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:04:32,288 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions. [2019-11-07 02:04:32,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:04:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions. [2019-11-07 02:04:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 02:04:32,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:32,290 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:04:32,290 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:32,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1768778322, now seen corresponding path program 1 times [2019-11-07 02:04:32,291 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:32,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567790782] [2019-11-07 02:04:32,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:04:32,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567790782] [2019-11-07 02:04:32,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:04:32,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 02:04:32,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405538231] [2019-11-07 02:04:32,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 02:04:32,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:04:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 02:04:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:04:32,395 INFO L87 Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand 6 states. [2019-11-07 02:04:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:04:35,895 INFO L93 Difference]: Finished difference Result 2531 states and 4571 transitions. [2019-11-07 02:04:35,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:04:35,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-07 02:04:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:04:35,908 INFO L225 Difference]: With dead ends: 2531 [2019-11-07 02:04:35,908 INFO L226 Difference]: Without dead ends: 1618 [2019-11-07 02:04:35,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 02:04:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2019-11-07 02:04:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1594. [2019-11-07 02:04:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2019-11-07 02:04:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2777 transitions. [2019-11-07 02:04:35,965 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2777 transitions. Word has length 24 [2019-11-07 02:04:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:04:35,966 INFO L462 AbstractCegarLoop]: Abstraction has 1594 states and 2777 transitions. [2019-11-07 02:04:35,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 02:04:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2777 transitions. [2019-11-07 02:04:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 02:04:35,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:35,970 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-07 02:04:35,970 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -514475001, now seen corresponding path program 1 times [2019-11-07 02:04:35,971 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:35,971 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479632213] [2019-11-07 02:04:35,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 02:04:36,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479632213] [2019-11-07 02:04:36,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452679138] [2019-11-07 02:04:36,099 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 [2019-11-07 02:04:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:36,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 02:04:36,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:04:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 02:04:36,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:04:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 02:04:36,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 02:04:36,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 02:04:36,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23816088] [2019-11-07 02:04:36,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:04:36,426 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:04:36,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:04:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-07 02:04:36,427 INFO L87 Difference]: Start difference. First operand 1594 states and 2777 transitions. Second operand 5 states. [2019-11-07 02:04:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:04:38,974 INFO L93 Difference]: Finished difference Result 4353 states and 7665 transitions. [2019-11-07 02:04:38,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:04:38,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-11-07 02:04:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:04:38,992 INFO L225 Difference]: With dead ends: 4353 [2019-11-07 02:04:38,993 INFO L226 Difference]: Without dead ends: 2764 [2019-11-07 02:04:38,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-07 02:04:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2019-11-07 02:04:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2731. [2019-11-07 02:04:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2731 states. [2019-11-07 02:04:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4281 transitions. [2019-11-07 02:04:39,098 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4281 transitions. Word has length 57 [2019-11-07 02:04:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:04:39,099 INFO L462 AbstractCegarLoop]: Abstraction has 2731 states and 4281 transitions. [2019-11-07 02:04:39,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:04:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4281 transitions. [2019-11-07 02:04:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-07 02:04:39,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:39,114 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 02:04:39,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:04:39,318 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:39,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1467679799, now seen corresponding path program 1 times [2019-11-07 02:04:39,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:39,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162058069] [2019-11-07 02:04:39,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 02:04:39,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162058069] [2019-11-07 02:04:39,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975445721] [2019-11-07 02:04:39,542 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 [2019-11-07 02:04:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:39,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 02:04:39,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:04:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 02:04:39,705 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:04:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 02:04:39,779 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 02:04:39,779 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-07 02:04:39,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389643227] [2019-11-07 02:04:39,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:04:39,780 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:04:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:04:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-07 02:04:39,781 INFO L87 Difference]: Start difference. First operand 2731 states and 4281 transitions. Second operand 5 states. [2019-11-07 02:04:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:04:41,838 INFO L93 Difference]: Finished difference Result 6180 states and 9828 transitions. [2019-11-07 02:04:41,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 02:04:41,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2019-11-07 02:04:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:04:41,857 INFO L225 Difference]: With dead ends: 6180 [2019-11-07 02:04:41,857 INFO L226 Difference]: Without dead ends: 3454 [2019-11-07 02:04:41,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-07 02:04:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2019-11-07 02:04:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3356. [2019-11-07 02:04:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3356 states. [2019-11-07 02:04:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 4811 transitions. [2019-11-07 02:04:41,970 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 4811 transitions. Word has length 81 [2019-11-07 02:04:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:04:41,971 INFO L462 AbstractCegarLoop]: Abstraction has 3356 states and 4811 transitions. [2019-11-07 02:04:41,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:04:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 4811 transitions. [2019-11-07 02:04:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 02:04:41,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:04:41,974 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:04:42,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:04:42,178 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:04:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:04:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1691545083, now seen corresponding path program 1 times [2019-11-07 02:04:42,178 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:04:42,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643068614] [2019-11-07 02:04:42,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:04:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 02:04:42,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643068614] [2019-11-07 02:04:42,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058728685] [2019-11-07 02:04:42,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:04:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:04:42,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 02:04:42,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:04:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 02:04:42,762 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:04:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 02:04:42,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571771861] [2019-11-07 02:04:42,863 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2019-11-07 02:04:42,864 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:04:42,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:04:42,877 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:04:42,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:04:43,006 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-11-07 02:04:43,053 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-11-07 02:04:43,393 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-11-07 02:04:43,639 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-11-07 02:04:43,686 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-11-07 02:04:44,198 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-11-07 02:04:44,205 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2019-11-07 02:04:49,719 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 51456 conjuctions. This might take some time...