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/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:59:15,466 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-07 00:59:15,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:59:15,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:59:15,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:59:15,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:59:15,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:59:15,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:59:15,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:59:15,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:59:15,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:59:15,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:59:15,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:59:15,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:59:15,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 00:59:15,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:59:15,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:59:15,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:59:15,556 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 00:59:15,575 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:59:15,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:59:15,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:59:15,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:59:15,577 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:59:15,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:59:15,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:59:15,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:59:15,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:59:15,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:59:15,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:59:15,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:59:15,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:59:15,584 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:59:15,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:59:15,586 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:59:15,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:59:15,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:59:15,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:59:15,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:59:15,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:59:15,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:59:15,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:59:15,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:59:15,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:59:15,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:59:15,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:59:15,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:59:15,591 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 00:59:15,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:59:15,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:59:15,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:59:15,900 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:59:15,900 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:59:15,901 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-10-07 00:59:15,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b9fba1d/04ffb08d8b2446738e250415a6a5a680/FLAGe6450d5eb [2019-10-07 00:59:16,693 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:59:16,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-10-07 00:59:16,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b9fba1d/04ffb08d8b2446738e250415a6a5a680/FLAGe6450d5eb [2019-10-07 00:59:16,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24b9fba1d/04ffb08d8b2446738e250415a6a5a680 [2019-10-07 00:59:16,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:59:16,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:59:16,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:59:16,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:59:16,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:59:16,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:16" (1/1) ... [2019-10-07 00:59:16,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5000c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:16, skipping insertion in model container [2019-10-07 00:59:16,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:16" (1/1) ... [2019-10-07 00:59:16,861 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:59:16,946 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:59:17,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:59:17,921 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:59:18,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:59:18,291 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:59:18,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18 WrapperNode [2019-10-07 00:59:18,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:59:18,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:59:18,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:59:18,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:59:18,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (1/1) ... [2019-10-07 00:59:18,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:59:18,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:59:18,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:59:18,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:59:18,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (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 00:59:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:59:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:59:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:59:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:59:18,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:59:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:59:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:59:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:59:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:59:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:59:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:59:21,929 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:59:21,930 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:59:21,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:21 BoogieIcfgContainer [2019-10-07 00:59:21,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:59:21,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:59:21,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:59:21,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:59:21,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:59:16" (1/3) ... [2019-10-07 00:59:21,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cc7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:21, skipping insertion in model container [2019-10-07 00:59:21,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:18" (2/3) ... [2019-10-07 00:59:21,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39cc7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:21, skipping insertion in model container [2019-10-07 00:59:21,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:21" (3/3) ... [2019-10-07 00:59:21,956 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2019-10-07 00:59:21,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:59:21,982 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:59:21,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:59:22,033 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:59:22,033 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:59:22,033 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:59:22,033 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:59:22,034 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:59:22,034 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:59:22,034 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:59:22,034 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:59:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-07 00:59:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-07 00:59:22,088 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:59:22,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:22,091 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:59:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:59:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash 136468006, now seen corresponding path program 1 times [2019-10-07 00:59:22,107 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:59:22,107 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:22,108 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:22,108 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:59:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:22,988 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 00:59:22,989 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:22,989 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:59:22,990 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 00:59:22,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 00:59:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 00:59:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 00:59:23,012 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2019-10-07 00:59:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:59:24,751 INFO L93 Difference]: Finished difference Result 613 states and 1182 transitions. [2019-10-07 00:59:24,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 00:59:24,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-07 00:59:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:59:24,779 INFO L225 Difference]: With dead ends: 613 [2019-10-07 00:59:24,780 INFO L226 Difference]: Without dead ends: 448 [2019-10-07 00:59:24,785 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 00:59:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-10-07 00:59:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 301. [2019-10-07 00:59:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-07 00:59:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 579 transitions. [2019-10-07 00:59:24,865 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 579 transitions. Word has length 149 [2019-10-07 00:59:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:59:24,866 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 579 transitions. [2019-10-07 00:59:24,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 00:59:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 579 transitions. [2019-10-07 00:59:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-07 00:59:24,872 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:59:24,872 INFO L385 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:24,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:59:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:59:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -660050486, now seen corresponding path program 1 times [2019-10-07 00:59:24,873 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:59:24,873 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:24,874 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:24,874 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:59:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:59:25,099 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:25,099 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:59:25,099 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 00:59:25,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 00:59:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 00:59:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-07 00:59:25,106 INFO L87 Difference]: Start difference. First operand 301 states and 579 transitions. Second operand 7 states. [2019-10-07 00:59:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:59:26,654 INFO L93 Difference]: Finished difference Result 945 states and 1905 transitions. [2019-10-07 00:59:26,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-07 00:59:26,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-07 00:59:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:59:26,662 INFO L225 Difference]: With dead ends: 945 [2019-10-07 00:59:26,663 INFO L226 Difference]: Without dead ends: 649 [2019-10-07 00:59:26,666 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-10-07 00:59:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-10-07 00:59:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 603. [2019-10-07 00:59:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-07 00:59:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1154 transitions. [2019-10-07 00:59:26,756 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1154 transitions. Word has length 165 [2019-10-07 00:59:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:59:26,756 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1154 transitions. [2019-10-07 00:59:26,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 00:59:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1154 transitions. [2019-10-07 00:59:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-07 00:59:26,763 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:59:26,763 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:26,764 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:59:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:59:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1566262061, now seen corresponding path program 1 times [2019-10-07 00:59:26,767 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:59:26,767 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:26,767 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:26,767 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:59:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:59:26,891 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:26,892 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:59:26,892 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:59:26,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:59:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:59:26,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:59:26,894 INFO L87 Difference]: Start difference. First operand 603 states and 1154 transitions. Second operand 6 states. [2019-10-07 00:59:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:59:28,330 INFO L93 Difference]: Finished difference Result 1859 states and 3754 transitions. [2019-10-07 00:59:28,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 00:59:28,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-10-07 00:59:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:59:28,342 INFO L225 Difference]: With dead ends: 1859 [2019-10-07 00:59:28,342 INFO L226 Difference]: Without dead ends: 1261 [2019-10-07 00:59:28,346 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 00:59:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2019-10-07 00:59:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1213. [2019-10-07 00:59:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-10-07 00:59:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2319 transitions. [2019-10-07 00:59:28,449 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2319 transitions. Word has length 166 [2019-10-07 00:59:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:59:28,459 INFO L462 AbstractCegarLoop]: Abstraction has 1213 states and 2319 transitions. [2019-10-07 00:59:28,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:59:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2319 transitions. [2019-10-07 00:59:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-07 00:59:28,467 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:59:28,468 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:28,468 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:59:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:59:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1427323489, now seen corresponding path program 1 times [2019-10-07 00:59:28,469 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:59:28,469 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:28,469 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:28,469 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:59:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:59:28,631 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:28,631 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:59:28,631 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 00:59:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:28,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 00:59:28,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:59:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 00:59:29,122 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:59:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:59:29,237 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 00:59:29,237 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-07 00:59:29,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 00:59:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 00:59:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 00:59:29,239 INFO L87 Difference]: Start difference. First operand 1213 states and 2319 transitions. Second operand 5 states. [2019-10-07 00:59:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:59:29,833 INFO L93 Difference]: Finished difference Result 3697 states and 7337 transitions. [2019-10-07 00:59:29,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 00:59:29,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-10-07 00:59:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:59:29,855 INFO L225 Difference]: With dead ends: 3697 [2019-10-07 00:59:29,855 INFO L226 Difference]: Without dead ends: 2489 [2019-10-07 00:59:29,860 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 343 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-07 00:59:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2019-10-07 00:59:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2451. [2019-10-07 00:59:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2451 states. [2019-10-07 00:59:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4764 transitions. [2019-10-07 00:59:29,977 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4764 transitions. Word has length 174 [2019-10-07 00:59:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:59:29,978 INFO L462 AbstractCegarLoop]: Abstraction has 2451 states and 4764 transitions. [2019-10-07 00:59:29,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 00:59:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4764 transitions. [2019-10-07 00:59:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 00:59:29,988 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:59:29,988 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:30,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:59:30,195 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:59:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:59:30,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1874744906, now seen corresponding path program 1 times [2019-10-07 00:59:30,196 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:59:30,196 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:30,196 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:30,196 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:59:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:59:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:59:30,498 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:59:30,498 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:59:30,499 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 00:59:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:59:30,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 00:59:30,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:59:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:59:30,955 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:59:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:59:31,161 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:59:31,229 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-07 00:59:31,229 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:59:31,238 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:59:31,250 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:59:31,251 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:59:32,052 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-07 00:59:32,289 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-07 00:59:32,434 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-07 00:59:32,707 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-07 00:59:32,992 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-07 00:59:33,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:59:33,689 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: ε 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: ε 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.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 00:59:33,695 INFO L168 Benchmark]: Toolchain (without parser) took 16850.76 ms. Allocated memory was 145.8 MB in the beginning and 591.9 MB in the end (delta: 446.2 MB). Free memory was 97.7 MB in the beginning and 530.7 MB in the end (delta: -433.0 MB). Peak memory consumption was 465.4 MB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,696 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1447.45 ms. Allocated memory was 145.8 MB in the beginning and 232.8 MB in the end (delta: 87.0 MB). Free memory was 97.5 MB in the beginning and 180.8 MB in the end (delta: -83.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,697 INFO L168 Benchmark]: Boogie Preprocessor took 170.48 ms. Allocated memory is still 232.8 MB. Free memory was 180.8 MB in the beginning and 169.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,698 INFO L168 Benchmark]: RCFGBuilder took 3472.01 ms. Allocated memory was 232.8 MB in the beginning and 350.2 MB in the end (delta: 117.4 MB). Free memory was 169.7 MB in the beginning and 279.5 MB in the end (delta: -109.8 MB). Peak memory consumption was 126.3 MB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,699 INFO L168 Benchmark]: TraceAbstraction took 11754.96 ms. Allocated memory was 350.2 MB in the beginning and 591.9 MB in the end (delta: 241.7 MB). Free memory was 279.5 MB in the beginning and 530.7 MB in the end (delta: -251.2 MB). Peak memory consumption was 442.8 MB. Max. memory is 7.1 GB. [2019-10-07 00:59:33,703 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 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1447.45 ms. Allocated memory was 145.8 MB in the beginning and 232.8 MB in the end (delta: 87.0 MB). Free memory was 97.5 MB in the beginning and 180.8 MB in the end (delta: -83.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 170.48 ms. Allocated memory is still 232.8 MB. Free memory was 180.8 MB in the beginning and 169.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3472.01 ms. Allocated memory was 232.8 MB in the beginning and 350.2 MB in the end (delta: 117.4 MB). Free memory was 169.7 MB in the beginning and 279.5 MB in the end (delta: -109.8 MB). Peak memory consumption was 126.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11754.96 ms. Allocated memory was 350.2 MB in the beginning and 591.9 MB in the end (delta: 241.7 MB). Free memory was 279.5 MB in the beginning and 530.7 MB in the end (delta: -251.2 MB). Peak memory consumption was 442.8 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: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: 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...