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/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 02:44:06,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 02:44:06,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 02:44:06,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 02:44:06,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 02:44:06,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 02:44:06,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 02:44:06,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 02:44:06,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 02:44:06,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 02:44:06,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 02:44:06,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 02:44:06,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 02:44:06,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 02:44:06,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 02:44:06,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 02:44:06,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 02:44:06,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 02:44:06,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 02:44:06,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 02:44:06,967 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 02:44:06,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 02:44:06,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 02:44:06,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 02:44:06,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 02:44:06,994 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 02:44:06,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 02:44:06,995 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 02:44:06,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 02:44:06,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 02:44:06,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 02:44:06,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 02:44:06,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 02:44:06,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 02:44:06,996 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 02:44:06,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 02:44:06,996 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 02:44:06,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 02:44:06,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 02:44:06,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 02:44:06,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 02:44:06,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 02:44:06,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 02:44:06,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 02:44:06,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 02:44:06,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 02:44:06,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 02:44:06,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 02:44:06,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 02:44:06,999 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 02:44:07,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 02:44:07,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 02:44:07,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 02:44:07,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 02:44:07,298 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 02:44:07,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-07 02:44:07,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95e0223/182c970083474ffd965d4380031c4b1d/FLAGefab263f1 [2019-10-07 02:44:08,187 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 02:44:08,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-07 02:44:08,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95e0223/182c970083474ffd965d4380031c4b1d/FLAGefab263f1 [2019-10-07 02:44:08,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af95e0223/182c970083474ffd965d4380031c4b1d [2019-10-07 02:44:08,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 02:44:08,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 02:44:08,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:08,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 02:44:08,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 02:44:08,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:08" (1/1) ... [2019-10-07 02:44:08,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6486081b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:08, skipping insertion in model container [2019-10-07 02:44:08,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:08" (1/1) ... [2019-10-07 02:44:08,313 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 02:44:08,491 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 02:44:10,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:10,041 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 02:44:10,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:10,751 INFO L192 MainTranslator]: Completed translation [2019-10-07 02:44:10,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10 WrapperNode [2019-10-07 02:44:10,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:10,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 02:44:10,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 02:44:10,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 02:44:10,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:10,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (1/1) ... [2019-10-07 02:44:11,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 02:44:11,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 02:44:11,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 02:44:11,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 02:44:11,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (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 02:44:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 02:44:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 02:44:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 02:44:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 02:44:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 02:44:11,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-07 02:44:11,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 02:44:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 02:44:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 02:44:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 02:44:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-07 02:44:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 02:44:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 02:44:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 02:44:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 02:44:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 02:44:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 02:44:18,265 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 02:44:18,265 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 02:44:18,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:44:18 BoogieIcfgContainer [2019-10-07 02:44:18,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 02:44:18,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 02:44:18,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 02:44:18,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 02:44:18,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:44:08" (1/3) ... [2019-10-07 02:44:18,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4507c643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:44:18, skipping insertion in model container [2019-10-07 02:44:18,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:10" (2/3) ... [2019-10-07 02:44:18,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4507c643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:44:18, skipping insertion in model container [2019-10-07 02:44:18,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:44:18" (3/3) ... [2019-10-07 02:44:18,278 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2019-10-07 02:44:18,288 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 02:44:18,297 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 02:44:18,309 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 02:44:18,342 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 02:44:18,343 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 02:44:18,343 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 02:44:18,343 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 02:44:18,343 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 02:44:18,343 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 02:44:18,343 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 02:44:18,343 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 02:44:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-07 02:44:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 02:44:18,383 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:18,384 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:18,386 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash -874913714, now seen corresponding path program 1 times [2019-10-07 02:44:18,401 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:18,401 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:18,402 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:18,402 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:18,651 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 02:44:18,654 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:18,655 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:18,655 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 02:44:18,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 02:44:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 02:44:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 02:44:18,679 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 4 states. [2019-10-07 02:44:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:27,167 INFO L93 Difference]: Finished difference Result 2753 states and 5428 transitions. [2019-10-07 02:44:27,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 02:44:27,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-07 02:44:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:27,208 INFO L225 Difference]: With dead ends: 2753 [2019-10-07 02:44:27,208 INFO L226 Difference]: Without dead ends: 2052 [2019-10-07 02:44:27,218 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 02:44:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-10-07 02:44:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2042. [2019-10-07 02:44:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2042 states. [2019-10-07 02:44:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 3332 transitions. [2019-10-07 02:44:27,404 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 3332 transitions. Word has length 11 [2019-10-07 02:44:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:27,404 INFO L462 AbstractCegarLoop]: Abstraction has 2042 states and 3332 transitions. [2019-10-07 02:44:27,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 02:44:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 3332 transitions. [2019-10-07 02:44:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-07 02:44:27,410 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:27,410 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:27,410 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1056520537, now seen corresponding path program 1 times [2019-10-07 02:44:27,412 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:27,412 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:27,413 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:27,413 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:27,596 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 02:44:27,596 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:27,597 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:27,597 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:44:27,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:44:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:44:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:44:27,602 INFO L87 Difference]: Start difference. First operand 2042 states and 3332 transitions. Second operand 6 states. [2019-10-07 02:44:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:34,396 INFO L93 Difference]: Finished difference Result 6196 states and 10265 transitions. [2019-10-07 02:44:34,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:44:34,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-07 02:44:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:34,427 INFO L225 Difference]: With dead ends: 6196 [2019-10-07 02:44:34,427 INFO L226 Difference]: Without dead ends: 4159 [2019-10-07 02:44:34,435 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 02:44:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2019-10-07 02:44:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 4098. [2019-10-07 02:44:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4098 states. [2019-10-07 02:44:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 6361 transitions. [2019-10-07 02:44:34,573 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 6361 transitions. Word has length 32 [2019-10-07 02:44:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:34,574 INFO L462 AbstractCegarLoop]: Abstraction has 4098 states and 6361 transitions. [2019-10-07 02:44:34,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:44:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 6361 transitions. [2019-10-07 02:44:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-07 02:44:34,577 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:34,577 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:34,578 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1281430295, now seen corresponding path program 1 times [2019-10-07 02:44:34,579 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:34,579 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:34,580 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:34,580 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:34,759 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 02:44:34,760 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:34,760 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:34,760 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:44:34,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:44:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:44:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:44:34,766 INFO L87 Difference]: Start difference. First operand 4098 states and 6361 transitions. Second operand 6 states. [2019-10-07 02:44:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:40,802 INFO L93 Difference]: Finished difference Result 12497 states and 20236 transitions. [2019-10-07 02:44:40,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:44:40,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-10-07 02:44:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:40,856 INFO L225 Difference]: With dead ends: 12497 [2019-10-07 02:44:40,856 INFO L226 Difference]: Without dead ends: 8404 [2019-10-07 02:44:40,869 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 02:44:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2019-10-07 02:44:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 8263. [2019-10-07 02:44:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8263 states. [2019-10-07 02:44:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8263 states to 8263 states and 12870 transitions. [2019-10-07 02:44:41,146 INFO L78 Accepts]: Start accepts. Automaton has 8263 states and 12870 transitions. Word has length 40 [2019-10-07 02:44:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:41,147 INFO L462 AbstractCegarLoop]: Abstraction has 8263 states and 12870 transitions. [2019-10-07 02:44:41,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:44:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 8263 states and 12870 transitions. [2019-10-07 02:44:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-07 02:44:41,159 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:41,160 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:41,160 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1662665925, now seen corresponding path program 1 times [2019-10-07 02:44:41,161 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:41,161 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:41,161 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:41,161 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 02:44:41,323 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:41,323 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:44:41,323 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 02:44:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:41,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 02:44:41,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:44:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-07 02:44:41,583 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:44:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 02:44:41,662 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 02:44:41,662 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-07 02:44:41,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:44:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:44:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-07 02:44:41,664 INFO L87 Difference]: Start difference. First operand 8263 states and 12870 transitions. Second operand 5 states. [2019-10-07 02:44:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:49,059 INFO L93 Difference]: Finished difference Result 24905 states and 40977 transitions. [2019-10-07 02:44:49,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 02:44:49,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-10-07 02:44:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:49,158 INFO L225 Difference]: With dead ends: 24905 [2019-10-07 02:44:49,158 INFO L226 Difference]: Without dead ends: 16647 [2019-10-07 02:44:49,192 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-07 02:44:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16647 states. [2019-10-07 02:44:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16647 to 12442. [2019-10-07 02:44:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12442 states. [2019-10-07 02:44:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 19341 transitions. [2019-10-07 02:44:49,617 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 19341 transitions. Word has length 60 [2019-10-07 02:44:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:49,618 INFO L462 AbstractCegarLoop]: Abstraction has 12442 states and 19341 transitions. [2019-10-07 02:44:49,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:44:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 19341 transitions. [2019-10-07 02:44:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-07 02:44:49,620 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:49,620 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:49,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:44:49,825 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1866955396, now seen corresponding path program 1 times [2019-10-07 02:44:49,826 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:49,826 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:49,826 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:49,826 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:49,989 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 02:44:49,989 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:49,990 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:49,990 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:44:49,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:44:49,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:44:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:44:49,991 INFO L87 Difference]: Start difference. First operand 12442 states and 19341 transitions. Second operand 6 states. [2019-10-07 02:44:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:56,363 INFO L93 Difference]: Finished difference Result 37484 states and 63513 transitions. [2019-10-07 02:44:56,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:44:56,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-10-07 02:44:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:56,545 INFO L225 Difference]: With dead ends: 37484 [2019-10-07 02:44:56,546 INFO L226 Difference]: Without dead ends: 25047 [2019-10-07 02:44:56,607 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 02:44:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25047 states. [2019-10-07 02:44:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25047 to 24853. [2019-10-07 02:44:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24853 states. [2019-10-07 02:44:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24853 states to 24853 states and 41128 transitions. [2019-10-07 02:44:57,340 INFO L78 Accepts]: Start accepts. Automaton has 24853 states and 41128 transitions. Word has length 65 [2019-10-07 02:44:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:57,341 INFO L462 AbstractCegarLoop]: Abstraction has 24853 states and 41128 transitions. [2019-10-07 02:44:57,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:44:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24853 states and 41128 transitions. [2019-10-07 02:44:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 02:44:57,343 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:57,344 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:44:57,344 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:57,344 INFO L82 PathProgramCache]: Analyzing trace with hash -304870058, now seen corresponding path program 1 times [2019-10-07 02:44:57,345 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:57,345 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:57,345 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:57,345 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 02:44:57,545 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:57,545 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:44:57,546 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 02:44:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:57,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 02:44:57,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:44:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:57,691 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:44:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:57,781 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 02:44:57,814 INFO L162 IcfgInterpreter]: Started Sifa with 61 locations of interest [2019-10-07 02:44:57,814 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 02:44:57,821 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 02:44:57,840 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 02:44:57,841 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 02:44:58,052 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2019-10-07 02:44:58,276 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-07 02:44:59,329 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-07 02:44:59,433 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-10-07 02:44:59,663 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-10-07 02:45:00,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:00,178 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 02:45:00,184 INFO L168 Benchmark]: Toolchain (without parser) took 51892.00 ms. Allocated memory was 137.9 MB in the beginning and 963.1 MB in the end (delta: 825.2 MB). Free memory was 89.6 MB in the beginning and 594.8 MB in the end (delta: -505.2 MB). Peak memory consumption was 320.0 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:00,185 INFO L168 Benchmark]: CDTParser took 0.24 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 02:45:00,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2458.82 ms. Allocated memory was 137.9 MB in the beginning and 259.5 MB in the end (delta: 121.6 MB). Free memory was 89.4 MB in the beginning and 181.8 MB in the end (delta: -92.4 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:00,187 INFO L168 Benchmark]: Boogie Preprocessor took 253.61 ms. Allocated memory is still 259.5 MB. Free memory was 181.8 MB in the beginning and 154.5 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:00,188 INFO L168 Benchmark]: RCFGBuilder took 7262.87 ms. Allocated memory was 259.5 MB in the beginning and 406.8 MB in the end (delta: 147.3 MB). Free memory was 154.5 MB in the beginning and 299.8 MB in the end (delta: -145.3 MB). Peak memory consumption was 250.4 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:00,192 INFO L168 Benchmark]: TraceAbstraction took 41910.75 ms. Allocated memory was 406.8 MB in the beginning and 963.1 MB in the end (delta: 556.3 MB). Free memory was 294.9 MB in the beginning and 594.8 MB in the end (delta: -299.9 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:00,196 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 2458.82 ms. Allocated memory was 137.9 MB in the beginning and 259.5 MB in the end (delta: 121.6 MB). Free memory was 89.4 MB in the beginning and 181.8 MB in the end (delta: -92.4 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 253.61 ms. Allocated memory is still 259.5 MB. Free memory was 181.8 MB in the beginning and 154.5 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7262.87 ms. Allocated memory was 259.5 MB in the beginning and 406.8 MB in the end (delta: 147.3 MB). Free memory was 154.5 MB in the beginning and 299.8 MB in the end (delta: -145.3 MB). Peak memory consumption was 250.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41910.75 ms. Allocated memory was 406.8 MB in the beginning and 963.1 MB in the end (delta: 556.3 MB). Free memory was 294.9 MB in the beginning and 594.8 MB in the end (delta: -299.9 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...