java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:31:02,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:31:02,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:31:02,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:31:02,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:31:02,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:31:02,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:31:02,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:31:02,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:31:02,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:31:02,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:31:02,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:31:02,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:31:02,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:31:02,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:31:02,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:31:02,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:31:02,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:31:02,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:31:02,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:31:02,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:31:02,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:31:02,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:31:02,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:31:02,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:31:02,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:31:02,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:31:02,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:31:02,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 03:31:02,696 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:31:02,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:31:02,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:31:02,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:31:02,698 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:31:02,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:31:02,699 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:31:02,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:31:02,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:31:02,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:31:02,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:31:02,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:31:02,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:31:02,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:31:02,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:31:02,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:31:02,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:31:02,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:31:02,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:31:02,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:31:02,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:31:02,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:31:02,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:31:02,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:31:02,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:31:02,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:31:02,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:31:02,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:31:02,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 03:31:02,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:31:02,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:31:02,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:31:02,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:31:02,993 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:31:02,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-07 03:31:03,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a66d022/1a0de263926a45b2b860d983ee497f98/FLAG0d92c0551 [2019-10-07 03:31:03,734 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:31:03,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-07 03:31:03,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a66d022/1a0de263926a45b2b860d983ee497f98/FLAG0d92c0551 [2019-10-07 03:31:03,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a66d022/1a0de263926a45b2b860d983ee497f98 [2019-10-07 03:31:03,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:31:03,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:31:03,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:03,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:31:03,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:31:03,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:03" (1/1) ... [2019-10-07 03:31:03,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f30a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:03, skipping insertion in model container [2019-10-07 03:31:03,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:03" (1/1) ... [2019-10-07 03:31:03,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:31:03,993 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:31:05,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:05,023 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:31:05,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:05,349 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:31:05,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05 WrapperNode [2019-10-07 03:31:05,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:05,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:31:05,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:31:05,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:31:05,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... [2019-10-07 03:31:05,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:31:05,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:31:05,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:31:05,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:31:05,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:31:05,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:31:05,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:31:05,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:31:05,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:31:05,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:31:05,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:31:05,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:31:05,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:31:05,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:31:05,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:31:05,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:31:05,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:31:05,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:31:22,358 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:31:22,359 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:31:22,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:22 BoogieIcfgContainer [2019-10-07 03:31:22,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:31:22,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:31:22,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:31:22,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:31:22,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:31:03" (1/3) ... [2019-10-07 03:31:22,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa18498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:22, skipping insertion in model container [2019-10-07 03:31:22,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:05" (2/3) ... [2019-10-07 03:31:22,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa18498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:22, skipping insertion in model container [2019-10-07 03:31:22,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:22" (3/3) ... [2019-10-07 03:31:22,382 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-07 03:31:22,393 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:31:22,400 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:31:22,409 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:31:22,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:31:22,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:31:22,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:31:22,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:31:22,438 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:31:22,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:31:22,439 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:31:22,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:31:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:31:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:31:22,470 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:22,471 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:22,473 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash 863566655, now seen corresponding path program 1 times [2019-10-07 03:31:22,489 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:22,489 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:22,490 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:22,490 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:22,726 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:22,727 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:22,728 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:31:22,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:31:22,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:31:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:31:22,750 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-07 03:31:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:24,565 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-07 03:31:24,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:31:24,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:31:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:24,587 INFO L225 Difference]: With dead ends: 718 [2019-10-07 03:31:24,587 INFO L226 Difference]: Without dead ends: 471 [2019-10-07 03:31:24,595 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:31:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-07 03:31:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2019-10-07 03:31:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-07 03:31:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 862 transitions. [2019-10-07 03:31:24,682 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 862 transitions. Word has length 11 [2019-10-07 03:31:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:24,682 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 862 transitions. [2019-10-07 03:31:24,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:31:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 862 transitions. [2019-10-07 03:31:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-07 03:31:24,685 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:24,685 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:24,685 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1738307863, now seen corresponding path program 1 times [2019-10-07 03:31:24,686 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:24,686 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:24,686 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:24,687 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:24,817 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:24,817 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:24,818 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:31:24,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:31:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:31:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:31:24,820 INFO L87 Difference]: Start difference. First operand 469 states and 862 transitions. Second operand 6 states. [2019-10-07 03:31:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:29,774 INFO L93 Difference]: Finished difference Result 1905 states and 3621 transitions. [2019-10-07 03:31:29,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-07 03:31:29,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-07 03:31:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:29,803 INFO L225 Difference]: With dead ends: 1905 [2019-10-07 03:31:29,804 INFO L226 Difference]: Without dead ends: 1441 [2019-10-07 03:31:29,807 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-07 03:31:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2019-10-07 03:31:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1405. [2019-10-07 03:31:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1405 states. [2019-10-07 03:31:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2454 transitions. [2019-10-07 03:31:29,891 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2454 transitions. Word has length 27 [2019-10-07 03:31:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:29,891 INFO L462 AbstractCegarLoop]: Abstraction has 1405 states and 2454 transitions. [2019-10-07 03:31:29,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:31:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2454 transitions. [2019-10-07 03:31:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-07 03:31:29,893 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:29,893 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:29,893 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1795587807, now seen corresponding path program 1 times [2019-10-07 03:31:29,894 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:29,894 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:29,894 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:29,895 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:30,028 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:30,028 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:30,030 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:31:30,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:31:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:31:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:31:30,031 INFO L87 Difference]: Start difference. First operand 1405 states and 2454 transitions. Second operand 6 states. [2019-10-07 03:31:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:32,764 INFO L93 Difference]: Finished difference Result 3783 states and 6869 transitions. [2019-10-07 03:31:32,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:31:32,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-07 03:31:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:32,784 INFO L225 Difference]: With dead ends: 3783 [2019-10-07 03:31:32,784 INFO L226 Difference]: Without dead ends: 2383 [2019-10-07 03:31:32,789 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:31:32,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2019-10-07 03:31:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2317. [2019-10-07 03:31:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2019-10-07 03:31:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4075 transitions. [2019-10-07 03:31:32,879 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4075 transitions. Word has length 31 [2019-10-07 03:31:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:32,879 INFO L462 AbstractCegarLoop]: Abstraction has 2317 states and 4075 transitions. [2019-10-07 03:31:32,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:31:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4075 transitions. [2019-10-07 03:31:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-07 03:31:32,883 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:32,883 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:32,883 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:32,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1889570729, now seen corresponding path program 1 times [2019-10-07 03:31:32,884 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:32,884 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:32,884 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:32,885 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:32,984 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:32,984 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:33,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:31:33,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:31:33,172 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:33,249 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:31:33,249 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-07 03:31:33,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:31:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:31:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 03:31:33,251 INFO L87 Difference]: Start difference. First operand 2317 states and 4075 transitions. Second operand 5 states. [2019-10-07 03:31:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:35,455 INFO L93 Difference]: Finished difference Result 5610 states and 10077 transitions. [2019-10-07 03:31:35,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:31:35,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-07 03:31:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:35,480 INFO L225 Difference]: With dead ends: 5610 [2019-10-07 03:31:35,481 INFO L226 Difference]: Without dead ends: 3298 [2019-10-07 03:31:35,490 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-07 03:31:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2019-10-07 03:31:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 3255. [2019-10-07 03:31:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2019-10-07 03:31:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5453 transitions. [2019-10-07 03:31:35,606 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5453 transitions. Word has length 57 [2019-10-07 03:31:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:35,606 INFO L462 AbstractCegarLoop]: Abstraction has 3255 states and 5453 transitions. [2019-10-07 03:31:35,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:31:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5453 transitions. [2019-10-07 03:31:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-07 03:31:35,617 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:35,617 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:35,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:35,823 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1906207545, now seen corresponding path program 1 times [2019-10-07 03:31:35,824 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:35,824 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:35,824 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:35,824 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:35,985 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:35,985 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:36,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:31:36,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:31:36,113 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:36,186 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:31:36,187 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-07 03:31:36,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:31:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:31:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 03:31:36,188 INFO L87 Difference]: Start difference. First operand 3255 states and 5453 transitions. Second operand 5 states. [2019-10-07 03:31:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:38,327 INFO L93 Difference]: Finished difference Result 7503 states and 13194 transitions. [2019-10-07 03:31:38,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:31:38,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-10-07 03:31:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:38,354 INFO L225 Difference]: With dead ends: 7503 [2019-10-07 03:31:38,355 INFO L226 Difference]: Without dead ends: 4253 [2019-10-07 03:31:38,366 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-07 03:31:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2019-10-07 03:31:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3881. [2019-10-07 03:31:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3881 states. [2019-10-07 03:31:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 5938 transitions. [2019-10-07 03:31:38,475 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 5938 transitions. Word has length 65 [2019-10-07 03:31:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:38,475 INFO L462 AbstractCegarLoop]: Abstraction has 3881 states and 5938 transitions. [2019-10-07 03:31:38,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:31:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 5938 transitions. [2019-10-07 03:31:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-07 03:31:38,476 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:38,477 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:38,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:38,682 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash 892555747, now seen corresponding path program 1 times [2019-10-07 03:31:38,683 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:38,683 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:38,684 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:38,684 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:38,933 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 03:31:38,934 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:38,934 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:39,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:31:39,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:39,074 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 03:31:39,075 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:39,151 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 03:31:39,151 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:31:39,182 INFO L162 IcfgInterpreter]: Started Sifa with 39 locations of interest [2019-10-07 03:31:39,182 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:31:39,189 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:31:39,198 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:31:39,198 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:31:39,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-07 03:31:39,553 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 48 [2019-10-07 03:31:39,940 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 48 [2019-10-07 03:31:40,096 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-07 03:31:40,104 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-07 03:31:40,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:40,394 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:31:40,404 INFO L168 Benchmark]: Toolchain (without parser) took 36487.60 ms. Allocated memory was 137.9 MB in the beginning and 561.0 MB in the end (delta: 423.1 MB). Free memory was 98.2 MB in the beginning and 271.4 MB in the end (delta: -173.2 MB). Peak memory consumption was 249.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,408 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1437.79 ms. Allocated memory was 137.9 MB in the beginning and 225.4 MB in the end (delta: 87.6 MB). Free memory was 98.0 MB in the beginning and 172.9 MB in the end (delta: -74.8 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,415 INFO L168 Benchmark]: Boogie Preprocessor took 160.96 ms. Allocated memory is still 225.4 MB. Free memory was 172.9 MB in the beginning and 161.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,419 INFO L168 Benchmark]: RCFGBuilder took 16852.28 ms. Allocated memory was 225.4 MB in the beginning and 360.2 MB in the end (delta: 134.7 MB). Free memory was 161.7 MB in the beginning and 208.4 MB in the end (delta: -46.7 MB). Peak memory consumption was 220.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,420 INFO L168 Benchmark]: TraceAbstraction took 18028.55 ms. Allocated memory was 360.2 MB in the beginning and 561.0 MB in the end (delta: 200.8 MB). Free memory was 208.4 MB in the beginning and 271.4 MB in the end (delta: -63.0 MB). Peak memory consumption was 137.8 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:40,425 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 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1437.79 ms. Allocated memory was 137.9 MB in the beginning and 225.4 MB in the end (delta: 87.6 MB). Free memory was 98.0 MB in the beginning and 172.9 MB in the end (delta: -74.8 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.96 ms. Allocated memory is still 225.4 MB. Free memory was 172.9 MB in the beginning and 161.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 16852.28 ms. Allocated memory was 225.4 MB in the beginning and 360.2 MB in the end (delta: 134.7 MB). Free memory was 161.7 MB in the beginning and 208.4 MB in the end (delta: -46.7 MB). Peak memory consumption was 220.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18028.55 ms. Allocated memory was 360.2 MB in the beginning and 561.0 MB in the end (delta: 200.8 MB). Free memory was 208.4 MB in the beginning and 271.4 MB in the end (delta: -63.0 MB). Peak memory consumption was 137.8 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: 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...