java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:41:10,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:41:10,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:41:10,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 21:41:11,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:41:11,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:41:11,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:41:11,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:41:11,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:41:11,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:41:11,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:41:11,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:41:11,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:41:11,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:41:11,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:41:11,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:41:11,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:41:11,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:41:11,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:41:11,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:41:11,042 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 [2019-10-13 21:41:11,062 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:41:11,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:41:11,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:41:11,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:41:11,064 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:41:11,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:41:11,065 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:41:11,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:41:11,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:41:11,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:41:11,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:41:11,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:41:11,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:41:11,067 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:41:11,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:41:11,067 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:41:11,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:41:11,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:41:11,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:41:11,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:41:11,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:41:11,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:11,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:41:11,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:41:11,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:41:11,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:41:11,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:41:11,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:41:11,070 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 [2019-10-13 21:41:11,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:41:11,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:41:11,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:41:11,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:41:11,362 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:41:11,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-10-13 21:41:11,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b512d4e89/65d6941c86104949b89578490b2bf97a/FLAGbbdcf0540 [2019-10-13 21:41:12,004 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:12,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-10-13 21:41:12,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b512d4e89/65d6941c86104949b89578490b2bf97a/FLAGbbdcf0540 [2019-10-13 21:41:12,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b512d4e89/65d6941c86104949b89578490b2bf97a [2019-10-13 21:41:12,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:12,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:12,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:12,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:12,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:12,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:12" (1/1) ... [2019-10-13 21:41:12,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c75e290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:12, skipping insertion in model container [2019-10-13 21:41:12,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:12" (1/1) ... [2019-10-13 21:41:12,296 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:12,350 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:12,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:12,833 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:12,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:13,007 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:13,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13 WrapperNode [2019-10-13 21:41:13,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:13,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:13,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:13,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:13,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (1/1) ... [2019-10-13 21:41:13,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:13,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:13,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:13,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:13,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (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 [2019-10-13 21:41:13,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:13,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:13,177 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:13,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:15,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:15,093 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:15,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:15 BoogieIcfgContainer [2019-10-13 21:41:15,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:15,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:15,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:15,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:15,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:12" (1/3) ... [2019-10-13 21:41:15,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d5f020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:15, skipping insertion in model container [2019-10-13 21:41:15,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:13" (2/3) ... [2019-10-13 21:41:15,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d5f020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:15, skipping insertion in model container [2019-10-13 21:41:15,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:15" (3/3) ... [2019-10-13 21:41:15,109 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label26.c [2019-10-13 21:41:15,121 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:15,130 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:15,141 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:15,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:15,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:15,172 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:15,172 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:15,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:15,172 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:15,173 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:15,173 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:15,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:15,218 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:15,222 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash -219356361, now seen corresponding path program 1 times [2019-10-13 21:41:15,239 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:15,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119421103] [2019-10-13 21:41:15,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:15,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:15,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:15,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119421103] [2019-10-13 21:41:15,747 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:15,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:15,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039613948] [2019-10-13 21:41:15,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:15,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:15,771 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:16,372 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:16,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:16,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:16,397 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:16,398 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:16,405 INFO L600 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 [2019-10-13 21:41:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-13 21:41:16,470 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-13 21:41:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:16,471 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-13 21:41:16,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-13 21:41:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 21:41:16,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:16,478 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:41:16,478 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1874051698, now seen corresponding path program 1 times [2019-10-13 21:41:16,479 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:16,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52677869] [2019-10-13 21:41:16,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:16,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:16,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:16,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52677869] [2019-10-13 21:41:16,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:16,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:16,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962803880] [2019-10-13 21:41:16,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:16,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:16,627 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-13 21:41:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:17,275 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-13 21:41:17,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:41:17,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-13 21:41:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:17,288 INFO L225 Difference]: With dead ends: 547 [2019-10-13 21:41:17,289 INFO L226 Difference]: Without dead ends: 377 [2019-10-13 21:41:17,292 INFO L600 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 [2019-10-13 21:41:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-13 21:41:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-13 21:41:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-13 21:41:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-13 21:41:17,369 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-13 21:41:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:17,370 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-13 21:41:17,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-13 21:41:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 21:41:17,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:17,375 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:17,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash 750790761, now seen corresponding path program 1 times [2019-10-13 21:41:17,376 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:17,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251360529] [2019-10-13 21:41:17,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:17,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:17,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 21:41:17,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251360529] [2019-10-13 21:41:17,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430069145] [2019-10-13 21:41:17,505 INFO L94 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 [2019-10-13 21:41:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:17,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:17,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:17,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:17,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443357904] [2019-10-13 21:41:17,912 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:17,913 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:17,918 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:17,926 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:17,927 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:18,228 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-13 21:41:18,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:18,766 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:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) 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:102) 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:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:41:18,772 INFO L168 Benchmark]: Toolchain (without parser) took 6494.42 ms. Allocated memory was 136.8 MB in the beginning and 306.2 MB in the end (delta: 169.3 MB). Free memory was 98.9 MB in the beginning and 224.4 MB in the end (delta: -125.5 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,773 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.82 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 98.7 MB in the beginning and 169.4 MB in the end (delta: -70.7 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,775 INFO L168 Benchmark]: Boogie Preprocessor took 112.37 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 164.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,776 INFO L168 Benchmark]: RCFGBuilder took 1974.38 ms. Allocated memory was 203.4 MB in the beginning and 254.8 MB in the end (delta: 51.4 MB). Free memory was 164.4 MB in the beginning and 203.4 MB in the end (delta: -39.0 MB). Peak memory consumption was 118.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,777 INFO L168 Benchmark]: TraceAbstraction took 3673.60 ms. Allocated memory was 254.8 MB in the beginning and 306.2 MB in the end (delta: 51.4 MB). Free memory was 203.4 MB in the beginning and 224.4 MB in the end (delta: -21.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:18,781 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 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 729.82 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 98.7 MB in the beginning and 169.4 MB in the end (delta: -70.7 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.37 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 164.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1974.38 ms. Allocated memory was 203.4 MB in the beginning and 254.8 MB in the end (delta: 51.4 MB). Free memory was 164.4 MB in the beginning and 203.4 MB in the end (delta: -39.0 MB). Peak memory consumption was 118.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3673.60 ms. Allocated memory was 254.8 MB in the beginning and 306.2 MB in the end (delta: 51.4 MB). Free memory was 203.4 MB in the beginning and 224.4 MB in the end (delta: -21.0 MB). Peak memory consumption was 30.4 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:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...