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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:46:22,700 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-07 03:46:22,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:46:22,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:46:22,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:46:22,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:46:22,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:46:22,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:46:22,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:46:22,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:46:22,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:46:22,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:46:22,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:46:22,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:46:22,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:46:22,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:46:22,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:46:22,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:46:22,751 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 03:46:22,768 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:46:22,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:46:22,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:46:22,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:46:22,770 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:46:22,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:46:22,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:46:22,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:46:22,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:46:22,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:46:22,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:46:22,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:46:22,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:46:22,772 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:46:22,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:46:22,772 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:46:22,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:46:22,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:46:22,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:46:22,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:46:22,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:46:22,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:46:22,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:46:22,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:46:22,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:46:22,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:46:22,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:46:22,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:46:22,775 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 03:46:23,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:46:23,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:46:23,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:46:23,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:46:23,090 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:46:23,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-07 03:46:23,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2e37e192/2c26c48c92304b00a67502281bb22482/FLAG2ff286d62 [2019-10-07 03:46:23,939 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:46:23,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-07 03:46:23,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2e37e192/2c26c48c92304b00a67502281bb22482/FLAG2ff286d62 [2019-10-07 03:46:24,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2e37e192/2c26c48c92304b00a67502281bb22482 [2019-10-07 03:46:24,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:46:24,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:46:24,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:24,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:46:24,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:46:24,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:24" (1/1) ... [2019-10-07 03:46:24,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4325fb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:24, skipping insertion in model container [2019-10-07 03:46:24,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:24" (1/1) ... [2019-10-07 03:46:24,053 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:46:24,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:46:25,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:25,420 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:46:25,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:25,907 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:46:25,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25 WrapperNode [2019-10-07 03:46:25,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:25,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:46:25,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:46:25,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:46:25,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:25,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:25,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:25,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:26,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:26,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:26,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (1/1) ... [2019-10-07 03:46:26,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:46:26,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:46:26,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:46:26,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:46:26,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (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 03:46:26,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:46:26,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:46:26,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:46:26,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:46:26,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 03:46:26,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:46:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:46:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:46:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 03:46:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:46:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:46:26,243 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:46:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:46:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:46:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:47:55,155 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:47:55,155 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:47:55,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:47:55 BoogieIcfgContainer [2019-10-07 03:47:55,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:47:55,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:47:55,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:47:55,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:47:55,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:46:24" (1/3) ... [2019-10-07 03:47:55,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5949ec5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:47:55, skipping insertion in model container [2019-10-07 03:47:55,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:25" (2/3) ... [2019-10-07 03:47:55,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5949ec5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:47:55, skipping insertion in model container [2019-10-07 03:47:55,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:47:55" (3/3) ... [2019-10-07 03:47:55,168 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-10-07 03:47:55,176 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:47:55,183 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:47:55,193 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:47:55,226 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:47:55,226 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:47:55,226 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:47:55,227 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:47:55,227 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:47:55,227 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:47:55,227 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:47:55,227 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:47:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2019-10-07 03:47:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:47:55,262 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:55,263 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:47:55,265 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1816948902, now seen corresponding path program 1 times [2019-10-07 03:47:55,280 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:55,280 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:55,280 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:55,281 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:55,568 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 03:47:55,568 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:55,569 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:55,570 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:47:55,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:47:55,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:47:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:47:55,591 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 3 states. [2019-10-07 03:47:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:47:58,593 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2019-10-07 03:47:58,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:47:58,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:47:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:47:58,621 INFO L225 Difference]: With dead ends: 1393 [2019-10-07 03:47:58,621 INFO L226 Difference]: Without dead ends: 921 [2019-10-07 03:47:58,630 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 03:47:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2019-10-07 03:47:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 894. [2019-10-07 03:47:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-07 03:47:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1676 transitions. [2019-10-07 03:47:58,742 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1676 transitions. Word has length 11 [2019-10-07 03:47:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:47:58,742 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1676 transitions. [2019-10-07 03:47:58,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:47:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1676 transitions. [2019-10-07 03:47:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-07 03:47:58,745 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:58,745 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 03:47:58,746 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1636346844, now seen corresponding path program 1 times [2019-10-07 03:47:58,746 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:58,747 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:58,747 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:58,747 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:58,897 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 03:47:58,898 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:58,901 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:58,901 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:47:58,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:47:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:47:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:47:58,904 INFO L87 Difference]: Start difference. First operand 894 states and 1676 transitions. Second operand 6 states. [2019-10-07 03:48:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:02,921 INFO L93 Difference]: Finished difference Result 2706 states and 5114 transitions. [2019-10-07 03:48:02,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:02,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-10-07 03:48:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:02,936 INFO L225 Difference]: With dead ends: 2706 [2019-10-07 03:48:02,936 INFO L226 Difference]: Without dead ends: 1817 [2019-10-07 03:48:02,940 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 03:48:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2019-10-07 03:48:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1767. [2019-10-07 03:48:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2019-10-07 03:48:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 3069 transitions. [2019-10-07 03:48:03,044 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 3069 transitions. Word has length 40 [2019-10-07 03:48:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:03,045 INFO L462 AbstractCegarLoop]: Abstraction has 1767 states and 3069 transitions. [2019-10-07 03:48:03,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:48:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 3069 transitions. [2019-10-07 03:48:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-07 03:48:03,050 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:03,050 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:03,051 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash -232342161, now seen corresponding path program 1 times [2019-10-07 03:48:03,052 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:03,052 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:03,052 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:03,053 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:03,227 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:03,227 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:03,227 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 03:48:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:03,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:48:03,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:03,419 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:03,520 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:48:03,521 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:48:03,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:48:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:48:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:48:03,522 INFO L87 Difference]: Start difference. First operand 1767 states and 3069 transitions. Second operand 5 states. [2019-10-07 03:48:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:09,635 INFO L93 Difference]: Finished difference Result 4540 states and 7903 transitions. [2019-10-07 03:48:09,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:48:09,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-07 03:48:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:09,657 INFO L225 Difference]: With dead ends: 4540 [2019-10-07 03:48:09,658 INFO L226 Difference]: Without dead ends: 2778 [2019-10-07 03:48:09,663 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-07 03:48:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2019-10-07 03:48:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2741. [2019-10-07 03:48:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2741 states. [2019-10-07 03:48:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 4495 transitions. [2019-10-07 03:48:09,766 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 4495 transitions. Word has length 54 [2019-10-07 03:48:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:09,766 INFO L462 AbstractCegarLoop]: Abstraction has 2741 states and 4495 transitions. [2019-10-07 03:48:09,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:48:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 4495 transitions. [2019-10-07 03:48:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-07 03:48:09,775 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:09,775 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:09,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:09,979 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash -119670242, now seen corresponding path program 1 times [2019-10-07 03:48:09,980 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:09,980 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:09,980 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:09,980 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:10,138 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:10,138 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:10,138 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 03:48:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:10,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:48:10,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:10,310 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:10,366 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:48:10,366 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-07 03:48:10,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:48:10,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:48:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 03:48:10,368 INFO L87 Difference]: Start difference. First operand 2741 states and 4495 transitions. Second operand 5 states. [2019-10-07 03:48:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:14,881 INFO L93 Difference]: Finished difference Result 8378 states and 14535 transitions. [2019-10-07 03:48:14,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:48:14,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-10-07 03:48:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:14,912 INFO L225 Difference]: With dead ends: 8378 [2019-10-07 03:48:14,912 INFO L226 Difference]: Without dead ends: 5642 [2019-10-07 03:48:14,921 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-07 03:48:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2019-10-07 03:48:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5560. [2019-10-07 03:48:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-10-07 03:48:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 8783 transitions. [2019-10-07 03:48:15,122 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 8783 transitions. Word has length 55 [2019-10-07 03:48:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:15,122 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 8783 transitions. [2019-10-07 03:48:15,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:48:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 8783 transitions. [2019-10-07 03:48:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-07 03:48:15,125 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:15,125 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 03:48:15,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:15,334 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 44577953, now seen corresponding path program 1 times [2019-10-07 03:48:15,335 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:15,335 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:15,336 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:15,336 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 03:48:15,430 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:15,430 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:15,430 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 03:48:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:15,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:48:15,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-07 03:48:15,578 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 03:48:15,639 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:48:15,639 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-07 03:48:15,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:48:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:48:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 03:48:15,640 INFO L87 Difference]: Start difference. First operand 5560 states and 8783 transitions. Second operand 5 states. [2019-10-07 03:48:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:20,101 INFO L93 Difference]: Finished difference Result 16679 states and 28205 transitions. [2019-10-07 03:48:20,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:20,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-10-07 03:48:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:20,177 INFO L225 Difference]: With dead ends: 16679 [2019-10-07 03:48:20,178 INFO L226 Difference]: Without dead ends: 11124 [2019-10-07 03:48:20,203 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-07 03:48:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11124 states. [2019-10-07 03:48:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11124 to 10645. [2019-10-07 03:48:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10645 states. [2019-10-07 03:48:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 15618 transitions. [2019-10-07 03:48:20,877 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 15618 transitions. Word has length 65 [2019-10-07 03:48:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:20,879 INFO L462 AbstractCegarLoop]: Abstraction has 10645 states and 15618 transitions. [2019-10-07 03:48:20,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:48:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 15618 transitions. [2019-10-07 03:48:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-07 03:48:20,883 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:20,888 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, 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] [2019-10-07 03:48:21,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:21,101 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1043657822, now seen corresponding path program 1 times [2019-10-07 03:48:21,102 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:21,103 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:21,103 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:21,103 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-07 03:48:21,219 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:21,220 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:21,220 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:48:21,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:48:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:48:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:48:21,222 INFO L87 Difference]: Start difference. First operand 10645 states and 15618 transitions. Second operand 4 states. [2019-10-07 03:48:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:26,213 INFO L93 Difference]: Finished difference Result 29718 states and 45992 transitions. [2019-10-07 03:48:26,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:48:26,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-07 03:48:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:26,296 INFO L225 Difference]: With dead ends: 29718 [2019-10-07 03:48:26,296 INFO L226 Difference]: Without dead ends: 19078 [2019-10-07 03:48:26,333 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 03:48:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19078 states. [2019-10-07 03:48:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19078 to 18068. [2019-10-07 03:48:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18068 states. [2019-10-07 03:48:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18068 states to 18068 states and 26953 transitions. [2019-10-07 03:48:27,066 INFO L78 Accepts]: Start accepts. Automaton has 18068 states and 26953 transitions. Word has length 87 [2019-10-07 03:48:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:27,069 INFO L462 AbstractCegarLoop]: Abstraction has 18068 states and 26953 transitions. [2019-10-07 03:48:27,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:48:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18068 states and 26953 transitions. [2019-10-07 03:48:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 03:48:27,078 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:27,078 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:27,079 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1616800186, now seen corresponding path program 1 times [2019-10-07 03:48:27,079 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:27,080 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:27,080 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:27,080 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:27,243 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:27,243 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:27,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:48:27,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-07 03:48:27,425 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-07 03:48:27,491 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 03:48:27,491 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-07 03:48:27,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:48:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:48:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 03:48:27,494 INFO L87 Difference]: Start difference. First operand 18068 states and 26953 transitions. Second operand 4 states. [2019-10-07 03:48:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:32,164 INFO L93 Difference]: Finished difference Result 42154 states and 62703 transitions. [2019-10-07 03:48:32,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:48:32,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-07 03:48:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:32,252 INFO L225 Difference]: With dead ends: 42154 [2019-10-07 03:48:32,252 INFO L226 Difference]: Without dead ends: 24460 [2019-10-07 03:48:32,311 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 03:48:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24460 states. [2019-10-07 03:48:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24460 to 22883. [2019-10-07 03:48:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22883 states. [2019-10-07 03:48:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22883 states to 22883 states and 30090 transitions. [2019-10-07 03:48:33,087 INFO L78 Accepts]: Start accepts. Automaton has 22883 states and 30090 transitions. Word has length 131 [2019-10-07 03:48:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:33,088 INFO L462 AbstractCegarLoop]: Abstraction has 22883 states and 30090 transitions. [2019-10-07 03:48:33,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:48:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22883 states and 30090 transitions. [2019-10-07 03:48:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2019-10-07 03:48:33,152 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:33,152 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:33,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:33,357 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 827889511, now seen corresponding path program 1 times [2019-10-07 03:48:33,357 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:33,358 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:33,358 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:33,358 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 03:48:33,840 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:33,840 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:34,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:48:34,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:34,290 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-07 03:48:34,741 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:48:34,804 INFO L162 IcfgInterpreter]: Started Sifa with 385 locations of interest [2019-10-07 03:48:34,804 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:48:34,823 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:48:34,834 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:48:34,834 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:48:35,036 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-07 03:48:35,647 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-07 03:48:36,016 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-07 03:48:36,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:36,572 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 03:48:36,577 INFO L168 Benchmark]: Toolchain (without parser) took 132547.48 ms. Allocated memory was 141.0 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 91.7 MB in the beginning and 767.0 MB in the end (delta: -675.2 MB). Peak memory consumption was 719.4 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:36,578 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 03:48:36,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1874.71 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 91.7 MB in the beginning and 121.0 MB in the end (delta: -29.3 MB). Peak memory consumption was 74.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:36,580 INFO L168 Benchmark]: Boogie Preprocessor took 255.83 ms. Allocated memory is still 234.9 MB. Free memory was 121.0 MB in the beginning and 100.1 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:36,581 INFO L168 Benchmark]: RCFGBuilder took 88991.39 ms. Allocated memory was 234.9 MB in the beginning and 961.0 MB in the end (delta: 726.1 MB). Free memory was 100.1 MB in the beginning and 701.8 MB in the end (delta: -601.7 MB). Peak memory consumption was 737.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:36,582 INFO L168 Benchmark]: TraceAbstraction took 41413.65 ms. Allocated memory was 961.0 MB in the beginning and 1.5 GB in the end (delta: 574.6 MB). Free memory was 701.3 MB in the beginning and 767.0 MB in the end (delta: -65.6 MB). Peak memory consumption was 509.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:36,586 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1874.71 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 91.7 MB in the beginning and 121.0 MB in the end (delta: -29.3 MB). Peak memory consumption was 74.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 255.83 ms. Allocated memory is still 234.9 MB. Free memory was 121.0 MB in the beginning and 100.1 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 88991.39 ms. Allocated memory was 234.9 MB in the beginning and 961.0 MB in the end (delta: 726.1 MB). Free memory was 100.1 MB in the beginning and 701.8 MB in the end (delta: -601.7 MB). Peak memory consumption was 737.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41413.65 ms. Allocated memory was 961.0 MB in the beginning and 1.5 GB in the end (delta: 574.6 MB). Free memory was 701.3 MB in the beginning and 767.0 MB in the end (delta: -65.6 MB). Peak memory consumption was 509.0 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...