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/Problem02_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:58:09,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 00:58:09,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 00:58:09,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 00:58:09,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:58:09,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:58:09,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:58:09,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:58:09,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:58:09,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:58:09,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:58:09,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:58:09,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:58:09,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:58:09,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:58:09,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:58:09,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 00:58:09,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:58:09,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:58:09,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:58:09,416 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 00:58:09,449 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:58:09,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:58:09,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:58:09,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:58:09,451 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:58:09,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:58:09,452 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:58:09,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:58:09,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:58:09,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:58:09,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:58:09,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:58:09,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:58:09,453 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:58:09,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:58:09,453 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:58:09,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:58:09,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:58:09,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:58:09,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:58:09,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:58:09,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:58:09,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:58:09,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:58:09,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:58:09,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:58:09,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:58:09,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:58:09,456 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 00:58:09,727 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:58:09,742 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:58:09,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:58:09,750 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:58:09,751 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:58:09,751 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-10-07 00:58:09,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94377096b/a03ae2d771ef42f09f19cc73a418b739/FLAG66d82e1d1 [2019-10-07 00:58:10,434 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:58:10,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-10-07 00:58:10,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94377096b/a03ae2d771ef42f09f19cc73a418b739/FLAG66d82e1d1 [2019-10-07 00:58:10,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94377096b/a03ae2d771ef42f09f19cc73a418b739 [2019-10-07 00:58:10,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:58:10,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:58:10,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:10,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:58:10,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:58:10,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:10" (1/1) ... [2019-10-07 00:58:10,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6509102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:10, skipping insertion in model container [2019-10-07 00:58:10,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:10" (1/1) ... [2019-10-07 00:58:10,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:58:10,830 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:58:11,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:11,383 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:58:11,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:11,524 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:58:11,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11 WrapperNode [2019-10-07 00:58:11,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:11,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:58:11,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:58:11,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:58:11,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (1/1) ... [2019-10-07 00:58:11,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:58:11,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:58:11,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:58:11,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:58:11,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (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 00:58:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:58:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:58:11,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:58:11,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:58:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:58:11,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:58:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:58:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:58:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:58:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:58:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:58:14,186 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:58:14,187 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:58:14,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:14 BoogieIcfgContainer [2019-10-07 00:58:14,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:58:14,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:58:14,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:58:14,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:58:14,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:58:10" (1/3) ... [2019-10-07 00:58:14,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2715da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:14, skipping insertion in model container [2019-10-07 00:58:14,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:11" (2/3) ... [2019-10-07 00:58:14,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2715da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:14, skipping insertion in model container [2019-10-07 00:58:14,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:14" (3/3) ... [2019-10-07 00:58:14,197 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label41.c [2019-10-07 00:58:14,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:58:14,216 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:58:14,228 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:58:14,255 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:58:14,256 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:58:14,256 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:58:14,256 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:58:14,256 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:58:14,257 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:58:14,257 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:58:14,257 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:58:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-07 00:58:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-07 00:58:14,289 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:14,289 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:14,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash -219368137, now seen corresponding path program 1 times [2019-10-07 00:58:14,304 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:14,304 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:14,304 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:14,304 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:14,750 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 00:58:14,750 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:14,751 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:14,751 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:14,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:14,776 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-07 00:58:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:15,506 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-07 00:58:15,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:15,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-07 00:58:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:15,523 INFO L225 Difference]: With dead ends: 273 [2019-10-07 00:58:15,524 INFO L226 Difference]: Without dead ends: 175 [2019-10-07 00:58:15,528 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:58:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-07 00:58:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-07 00:58:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-07 00:58:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-07 00:58:15,593 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-07 00:58:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:15,594 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-07 00:58:15,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-07 00:58:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-07 00:58:15,599 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:15,600 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:15,600 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 656209002, now seen corresponding path program 1 times [2019-10-07 00:58:15,601 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:15,601 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:15,601 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:15,625 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:15,884 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:15,884 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:15,885 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:58:15,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:58:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:58:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:58:15,888 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-07 00:58:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:16,594 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-07 00:58:16,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:58:16,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-07 00:58:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:16,600 INFO L225 Difference]: With dead ends: 531 [2019-10-07 00:58:16,601 INFO L226 Difference]: Without dead ends: 361 [2019-10-07 00:58:16,603 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 00:58:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-07 00:58:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-07 00:58:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-07 00:58:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-10-07 00:58:16,681 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-10-07 00:58:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:16,685 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-10-07 00:58:16,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:58:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-10-07 00:58:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-07 00:58:16,698 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:16,698 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:16,700 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1784864925, now seen corresponding path program 1 times [2019-10-07 00:58:16,701 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:16,701 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:16,702 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:16,702 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:16,899 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:16,899 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:16,899 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:16,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:16,900 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-10-07 00:58:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:17,329 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-10-07 00:58:17,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:17,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-07 00:58:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:17,337 INFO L225 Difference]: With dead ends: 963 [2019-10-07 00:58:17,338 INFO L226 Difference]: Without dead ends: 613 [2019-10-07 00:58:17,341 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 00:58:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-10-07 00:58:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-10-07 00:58:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-10-07 00:58:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-10-07 00:58:17,375 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-10-07 00:58:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:17,376 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-10-07 00:58:17,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-10-07 00:58:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-07 00:58:17,381 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:17,381 INFO L385 BasicCegarLoop]: trace histogram [3, 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, 1, 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 00:58:17,381 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1660922037, now seen corresponding path program 1 times [2019-10-07 00:58:17,382 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:17,382 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:17,382 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:17,383 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:17,551 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:17,552 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:17,552 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 00:58:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:17,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 00:58:17,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:58:17,838 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:58:17,966 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 00:58:17,967 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-10-07 00:58:17,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 00:58:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 00:58:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 00:58:17,968 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-10-07 00:58:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:18,584 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-10-07 00:58:18,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:58:18,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-07 00:58:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:18,595 INFO L225 Difference]: With dead ends: 1599 [2019-10-07 00:58:18,595 INFO L226 Difference]: Without dead ends: 991 [2019-10-07 00:58:18,598 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-07 00:58:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-07 00:58:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-10-07 00:58:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-10-07 00:58:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-10-07 00:58:18,650 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-10-07 00:58:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:18,650 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-10-07 00:58:18,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 00:58:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-10-07 00:58:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-07 00:58:18,656 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:18,656 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:18,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:18,862 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1191501040, now seen corresponding path program 1 times [2019-10-07 00:58:18,863 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:18,863 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:18,863 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:18,863 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:58:18,978 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:18,979 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:18,979 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 00:58:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:19,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:58:19,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-07 00:58:19,157 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:58:19,225 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:58:19,261 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-07 00:58:19,262 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:58:19,268 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:58:19,278 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:58:19,279 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:58:19,535 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-07 00:58:20,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:20,065 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 00:58:20,077 INFO L168 Benchmark]: Toolchain (without parser) took 9331.73 ms. Allocated memory was 144.7 MB in the beginning and 332.9 MB in the end (delta: 188.2 MB). Free memory was 99.6 MB in the beginning and 90.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 197.1 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,080 INFO L168 Benchmark]: CDTParser took 1.30 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 782.90 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 99.4 MB in the beginning and 170.5 MB in the end (delta: -71.2 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,086 INFO L168 Benchmark]: Boogie Preprocessor took 140.43 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 165.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,088 INFO L168 Benchmark]: RCFGBuilder took 2521.99 ms. Allocated memory was 203.9 MB in the beginning and 252.2 MB in the end (delta: 48.2 MB). Free memory was 165.7 MB in the beginning and 205.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,092 INFO L168 Benchmark]: TraceAbstraction took 5881.72 ms. Allocated memory was 252.2 MB in the beginning and 332.9 MB in the end (delta: 80.7 MB). Free memory was 203.7 MB in the beginning and 90.7 MB in the end (delta: 112.9 MB). Peak memory consumption was 193.7 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:20,103 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.30 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 782.90 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 99.4 MB in the beginning and 170.5 MB in the end (delta: -71.2 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.43 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 165.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2521.99 ms. Allocated memory was 203.9 MB in the beginning and 252.2 MB in the end (delta: 48.2 MB). Free memory was 165.7 MB in the beginning and 205.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5881.72 ms. Allocated memory was 252.2 MB in the beginning and 332.9 MB in the end (delta: 80.7 MB). Free memory was 203.7 MB in the beginning and 90.7 MB in the end (delta: 112.9 MB). Peak memory consumption was 193.7 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...