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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:33:35,824 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-07 03:33:35,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:33:35,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:33:35,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:33:35,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:33:35,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:33:35,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:33:35,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:33:35,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:33:35,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:33:35,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:33:35,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:33:35,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:33:35,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:33:35,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:33:35,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:33:35,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:33:35,916 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 03:33:35,931 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:33:35,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:33:35,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:33:35,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:33:35,935 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:33:35,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:33:35,936 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:33:35,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:33:35,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:33:35,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:33:35,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:33:35,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:33:35,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:33:35,937 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:33:35,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:33:35,938 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:33:35,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:33:35,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:33:35,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:33:35,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:33:35,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:33:35,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:33:35,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:33:35,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:33:35,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:33:35,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:33:35,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:33:35,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:33:35,943 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 03:33:36,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:33:36,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:33:36,272 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:33:36,274 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:33:36,274 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:33:36,275 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-07 03:33:36,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5734315f/a13a314b8d084421bcf2e3d7b7d982e9/FLAGc085e8234 [2019-10-07 03:33:37,049 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:33:37,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-07 03:33:37,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5734315f/a13a314b8d084421bcf2e3d7b7d982e9/FLAGc085e8234 [2019-10-07 03:33:37,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5734315f/a13a314b8d084421bcf2e3d7b7d982e9 [2019-10-07 03:33:37,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:33:37,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:33:37,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:33:37,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:33:37,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:33:37,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:33:37" (1/1) ... [2019-10-07 03:33:37,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c32a846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:37, skipping insertion in model container [2019-10-07 03:33:37,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:33:37" (1/1) ... [2019-10-07 03:33:37,252 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:33:37,336 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:33:38,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:33:38,203 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:33:38,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:33:38,440 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:33:38,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38 WrapperNode [2019-10-07 03:33:38,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:33:38,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:33:38,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:33:38,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:33:38,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... [2019-10-07 03:33:38,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:33:38,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:33:38,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:33:38,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:33:38,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:33:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:33:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:33:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:33:38,706 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:33:38,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:33:38,706 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:33:38,706 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:33:38,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:33:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:33:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:33:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:33:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:33:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:33:52,518 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:33:52,518 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:33:52,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:33:52 BoogieIcfgContainer [2019-10-07 03:33:52,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:33:52,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:33:52,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:33:52,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:33:52,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:33:37" (1/3) ... [2019-10-07 03:33:52,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e272695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:33:52, skipping insertion in model container [2019-10-07 03:33:52,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:33:38" (2/3) ... [2019-10-07 03:33:52,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e272695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:33:52, skipping insertion in model container [2019-10-07 03:33:52,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:33:52" (3/3) ... [2019-10-07 03:33:52,528 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-10-07 03:33:52,538 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:33:52,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:33:52,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:33:52,585 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:33:52,585 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:33:52,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:33:52,586 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:33:52,586 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:33:52,586 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:33:52,586 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:33:52,586 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:33:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:33:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:33:52,618 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:33:52,620 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:33:52,622 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:33:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:33:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash 863562303, now seen corresponding path program 1 times [2019-10-07 03:33:52,638 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:33:52,639 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:52,639 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:52,639 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:33:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:33:52,901 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 03:33:52,902 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:52,902 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:33:52,902 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:33:52,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:33:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:33:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:33:52,925 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-07 03:33:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:33:54,623 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-07 03:33:54,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:33:54,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:33:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:33:54,646 INFO L225 Difference]: With dead ends: 718 [2019-10-07 03:33:54,646 INFO L226 Difference]: Without dead ends: 471 [2019-10-07 03:33:54,660 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 03:33:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-07 03:33:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2019-10-07 03:33:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-10-07 03:33:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2019-10-07 03:33:54,763 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2019-10-07 03:33:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:33:54,763 INFO L462 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2019-10-07 03:33:54,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:33:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2019-10-07 03:33:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 03:33:54,766 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:33:54,767 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:33:54,767 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:33:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:33:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash 328286237, now seen corresponding path program 1 times [2019-10-07 03:33:54,768 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:33:54,768 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:54,768 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:54,769 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:33:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:33:54,870 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 03:33:54,871 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:54,871 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:33:54,871 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 03:33:54,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:33:54,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:33:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 03:33:54,874 INFO L87 Difference]: Start difference. First operand 455 states and 857 transitions. Second operand 5 states. [2019-10-07 03:33:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:33:57,478 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2019-10-07 03:33:57,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:33:57,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-07 03:33:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:33:57,492 INFO L225 Difference]: With dead ends: 1369 [2019-10-07 03:33:57,492 INFO L226 Difference]: Without dead ends: 919 [2019-10-07 03:33:57,494 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 03:33:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-10-07 03:33:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2019-10-07 03:33:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2019-10-07 03:33:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2019-10-07 03:33:57,554 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2019-10-07 03:33:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:33:57,554 INFO L462 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2019-10-07 03:33:57,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:33:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2019-10-07 03:33:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-07 03:33:57,556 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:33:57,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:33:57,557 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:33:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:33:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 7530234, now seen corresponding path program 1 times [2019-10-07 03:33:57,558 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:33:57,558 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:57,558 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:57,558 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:33:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:33:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:33:57,672 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 03:33:57,672 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:33:57,673 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:33:57,673 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:33:57,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:33:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:33:57,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:33:57,674 INFO L87 Difference]: Start difference. First operand 879 states and 1570 transitions. Second operand 6 states. [2019-10-07 03:34:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:00,373 INFO L93 Difference]: Finished difference Result 2455 states and 4487 transitions. [2019-10-07 03:34:00,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:34:00,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2019-10-07 03:34:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:00,392 INFO L225 Difference]: With dead ends: 2455 [2019-10-07 03:34:00,392 INFO L226 Difference]: Without dead ends: 1581 [2019-10-07 03:34:00,395 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 03:34:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2019-10-07 03:34:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1560. [2019-10-07 03:34:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1560 states. [2019-10-07 03:34:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2706 transitions. [2019-10-07 03:34:00,492 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2706 transitions. Word has length 50 [2019-10-07 03:34:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:00,493 INFO L462 AbstractCegarLoop]: Abstraction has 1560 states and 2706 transitions. [2019-10-07 03:34:00,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:34:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2706 transitions. [2019-10-07 03:34:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-07 03:34:00,502 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:00,502 INFO L385 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, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:00,502 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1468030219, now seen corresponding path program 1 times [2019-10-07 03:34:00,504 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:00,505 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:00,505 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:00,505 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:00,656 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:00,656 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:00,656 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 03:34:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:00,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:34:00,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:34:00,850 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:00,927 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:34:00,927 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:34:00,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:34:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:34:00,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:34:00,929 INFO L87 Difference]: Start difference. First operand 1560 states and 2706 transitions. Second operand 5 states. [2019-10-07 03:34:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:03,248 INFO L93 Difference]: Finished difference Result 3811 states and 6632 transitions. [2019-10-07 03:34:03,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 03:34:03,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-07 03:34:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:03,269 INFO L225 Difference]: With dead ends: 3811 [2019-10-07 03:34:03,270 INFO L226 Difference]: Without dead ends: 2256 [2019-10-07 03:34:03,275 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-07 03:34:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2019-10-07 03:34:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2222. [2019-10-07 03:34:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2222 states. [2019-10-07 03:34:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3220 transitions. [2019-10-07 03:34:03,373 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3220 transitions. Word has length 63 [2019-10-07 03:34:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:03,373 INFO L462 AbstractCegarLoop]: Abstraction has 2222 states and 3220 transitions. [2019-10-07 03:34:03,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:34:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3220 transitions. [2019-10-07 03:34:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-07 03:34:03,381 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:03,381 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:03,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:03,586 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1765916849, now seen corresponding path program 1 times [2019-10-07 03:34:03,587 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:03,587 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:03,588 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:03,588 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:03,814 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:03,815 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:03,815 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 03:34:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:03,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:34:03,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:34:03,999 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:04,095 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:34:04,095 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:34:04,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:34:04,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:34:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:34:04,097 INFO L87 Difference]: Start difference. First operand 2222 states and 3220 transitions. Second operand 5 states. [2019-10-07 03:34:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:06,176 INFO L93 Difference]: Finished difference Result 5177 states and 7563 transitions. [2019-10-07 03:34:06,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:34:06,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-10-07 03:34:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:06,194 INFO L225 Difference]: With dead ends: 5177 [2019-10-07 03:34:06,195 INFO L226 Difference]: Without dead ends: 2960 [2019-10-07 03:34:06,201 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-07 03:34:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-10-07 03:34:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2907. [2019-10-07 03:34:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2907 states. [2019-10-07 03:34:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4097 transitions. [2019-10-07 03:34:06,294 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4097 transitions. Word has length 85 [2019-10-07 03:34:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:06,295 INFO L462 AbstractCegarLoop]: Abstraction has 2907 states and 4097 transitions. [2019-10-07 03:34:06,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:34:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4097 transitions. [2019-10-07 03:34:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-07 03:34:06,297 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:06,298 INFO L385 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:06,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:06,511 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash 357958041, now seen corresponding path program 1 times [2019-10-07 03:34:06,511 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:06,512 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:06,512 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:06,512 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 03:34:06,604 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:06,605 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:06,608 INFO L95 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 [2019-10-07 03:34:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:06,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:34:06,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:06,925 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 03:34:06,926 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 03:34:06,998 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:34:07,045 INFO L162 IcfgInterpreter]: Started Sifa with 64 locations of interest [2019-10-07 03:34:07,046 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:34:07,051 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:34:07,059 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:34:07,059 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:34:07,225 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-07 03:34:07,358 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-07 03:34:07,567 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-07 03:34:07,780 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-07 03:34:08,016 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-07 03:34:08,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:08,471 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 03:34:08,479 INFO L168 Benchmark]: Toolchain (without parser) took 31241.36 ms. Allocated memory was 140.5 MB in the beginning and 466.6 MB in the end (delta: 326.1 MB). Free memory was 101.3 MB in the beginning and 166.5 MB in the end (delta: -65.2 MB). Peak memory consumption was 260.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,480 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.8 MB in the beginning and 123.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1204.78 ms. Allocated memory was 140.5 MB in the beginning and 212.9 MB in the end (delta: 72.4 MB). Free memory was 101.1 MB in the beginning and 149.1 MB in the end (delta: -48.0 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,484 INFO L168 Benchmark]: Boogie Preprocessor took 200.62 ms. Allocated memory is still 212.9 MB. Free memory was 149.1 MB in the beginning and 138.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,486 INFO L168 Benchmark]: RCFGBuilder took 13877.30 ms. Allocated memory was 212.9 MB in the beginning and 323.0 MB in the end (delta: 110.1 MB). Free memory was 138.3 MB in the beginning and 249.1 MB in the end (delta: -110.8 MB). Peak memory consumption was 141.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,492 INFO L168 Benchmark]: TraceAbstraction took 15954.49 ms. Allocated memory was 323.0 MB in the beginning and 466.6 MB in the end (delta: 143.7 MB). Free memory was 249.1 MB in the beginning and 166.5 MB in the end (delta: 82.6 MB). Peak memory consumption was 226.3 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:08,502 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 140.5 MB. Free memory was 123.8 MB in the beginning and 123.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1204.78 ms. Allocated memory was 140.5 MB in the beginning and 212.9 MB in the end (delta: 72.4 MB). Free memory was 101.1 MB in the beginning and 149.1 MB in the end (delta: -48.0 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 200.62 ms. Allocated memory is still 212.9 MB. Free memory was 149.1 MB in the beginning and 138.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13877.30 ms. Allocated memory was 212.9 MB in the beginning and 323.0 MB in the end (delta: 110.1 MB). Free memory was 138.3 MB in the beginning and 249.1 MB in the end (delta: -110.8 MB). Peak memory consumption was 141.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15954.49 ms. Allocated memory was 323.0 MB in the beginning and 466.6 MB in the end (delta: 143.7 MB). Free memory was 249.1 MB in the beginning and 166.5 MB in the end (delta: 82.6 MB). Peak memory consumption was 226.3 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...