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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:41:07,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:41:07,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:41:07,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 21:41:07,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:41:07,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:41:07,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:41:07,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:41:07,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:41:07,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:41:07,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:41:07,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:41:07,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:41:07,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:41:07,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:41:07,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:41:07,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:41:07,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:41:07,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:41:07,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:41:07,450 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 21:41:07,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:41:07,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:41:07,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:41:07,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:41:07,476 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:41:07,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:41:07,477 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:41:07,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:41:07,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:41:07,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:41:07,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:41:07,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:41:07,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:41:07,480 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:41:07,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:41:07,480 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:41:07,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:41:07,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:41:07,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:41:07,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:41:07,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:41:07,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:07,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:41:07,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:41:07,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:41:07,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:41:07,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:41:07,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:41:07,482 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 21:41:07,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:41:07,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:41:07,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:41:07,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:41:07,789 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:41:07,790 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-13 21:41:07,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59feb77b/c5bf1fd5f5434b2ab752c39bda986149/FLAG1a287f219 [2019-10-13 21:41:08,437 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:08,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-13 21:41:08,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59feb77b/c5bf1fd5f5434b2ab752c39bda986149/FLAG1a287f219 [2019-10-13 21:41:08,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59feb77b/c5bf1fd5f5434b2ab752c39bda986149 [2019-10-13 21:41:08,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:08,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:08,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:08,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:08,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:08,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:08" (1/1) ... [2019-10-13 21:41:08,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43009ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:08, skipping insertion in model container [2019-10-13 21:41:08,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:08" (1/1) ... [2019-10-13 21:41:08,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:08,792 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:09,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:09,347 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:09,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:09,472 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:09,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09 WrapperNode [2019-10-13 21:41:09,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:09,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:09,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:09,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:09,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (1/1) ... [2019-10-13 21:41:09,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:09,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:09,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:09,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:09,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (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 21:41:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:11,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:11,645 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:11,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:11 BoogieIcfgContainer [2019-10-13 21:41:11,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:11,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:11,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:11,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:11,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:08" (1/3) ... [2019-10-13 21:41:11,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37402222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:11, skipping insertion in model container [2019-10-13 21:41:11,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:09" (2/3) ... [2019-10-13 21:41:11,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37402222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:11, skipping insertion in model container [2019-10-13 21:41:11,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:11" (3/3) ... [2019-10-13 21:41:11,655 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2019-10-13 21:41:11,666 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:11,678 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:11,690 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:11,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:11,716 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:11,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:11,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:11,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:11,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:11,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:11,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:11,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:11,746 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 21:41:11,747 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash -219366345, now seen corresponding path program 1 times [2019-10-13 21:41:11,762 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:11,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893153272] [2019-10-13 21:41:11,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:11,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:11,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:12,172 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 21:41:12,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893153272] [2019-10-13 21:41:12,174 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:12,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:12,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692111911] [2019-10-13 21:41:12,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:12,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:12,198 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:12,757 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:12,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:12,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:12,775 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:12,775 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:12,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 21:41:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-13 21:41:12,898 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-13 21:41:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:12,899 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-13 21:41:12,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-13 21:41:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 21:41:12,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:12,907 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:41:12,907 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash 656210794, now seen corresponding path program 1 times [2019-10-13 21:41:12,908 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:12,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566108371] [2019-10-13 21:41:12,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:12,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:12,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:13,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566108371] [2019-10-13 21:41:13,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:13,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:13,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207750945] [2019-10-13 21:41:13,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:13,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:13,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:13,122 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-13 21:41:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:13,828 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-13 21:41:13,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:13,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-13 21:41:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:13,838 INFO L225 Difference]: With dead ends: 531 [2019-10-13 21:41:13,838 INFO L226 Difference]: Without dead ends: 361 [2019-10-13 21:41:13,840 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 21:41:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-13 21:41:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-13 21:41:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-13 21:41:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-10-13 21:41:13,897 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-10-13 21:41:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:13,897 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-10-13 21:41:13,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-10-13 21:41:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 21:41:13,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:13,907 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:41:13,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 633621345, now seen corresponding path program 1 times [2019-10-13 21:41:13,909 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:13,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480571171] [2019-10-13 21:41:13,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:13,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:13,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:14,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480571171] [2019-10-13 21:41:14,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:14,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:14,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056497828] [2019-10-13 21:41:14,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:14,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:14,094 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-10-13 21:41:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:14,553 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-10-13 21:41:14,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:14,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-13 21:41:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:14,562 INFO L225 Difference]: With dead ends: 963 [2019-10-13 21:41:14,562 INFO L226 Difference]: Without dead ends: 613 [2019-10-13 21:41:14,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:41:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-10-13 21:41:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-10-13 21:41:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-10-13 21:41:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-10-13 21:41:14,597 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-10-13 21:41:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:14,598 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-10-13 21:41:14,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-10-13 21:41:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:41:14,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:14,603 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-13 21:41:14,603 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1660923829, now seen corresponding path program 1 times [2019-10-13 21:41:14,604 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:14,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759749527] [2019-10-13 21:41:14,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:14,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:14,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:14,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759749527] [2019-10-13 21:41:14,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137460383] [2019-10-13 21:41:14,683 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 21:41:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:14,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:41:14,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:41:15,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:41:15,163 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:41:15,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-10-13 21:41:15,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911626643] [2019-10-13 21:41:15,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:41:15,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:41:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:41:15,167 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-10-13 21:41:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:15,947 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-10-13 21:41:15,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:15,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-13 21:41:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:15,959 INFO L225 Difference]: With dead ends: 1599 [2019-10-13 21:41:15,959 INFO L226 Difference]: Without dead ends: 991 [2019-10-13 21:41:15,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:41:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-13 21:41:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-10-13 21:41:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-10-13 21:41:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-10-13 21:41:16,013 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-10-13 21:41:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:16,014 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-10-13 21:41:16,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:41:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-10-13 21:41:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:41:16,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:16,019 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:16,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:16,225 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1191499248, now seen corresponding path program 1 times [2019-10-13 21:41:16,227 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:16,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269375385] [2019-10-13 21:41:16,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:16,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:16,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:41:16,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269375385] [2019-10-13 21:41:16,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822747784] [2019-10-13 21:41:16,327 INFO L94 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 [2019-10-13 21:41:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:16,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:16,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:41:16,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:41:16,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97590584] [2019-10-13 21:41:16,613 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:16,614 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:16,629 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:16,637 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:16,638 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:16,876 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-13 21:41:17,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:17,484 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 21:41:17,490 INFO L168 Benchmark]: Toolchain (without parser) took 8758.87 ms. Allocated memory was 137.9 MB in the beginning and 329.3 MB in the end (delta: 191.4 MB). Free memory was 100.4 MB in the beginning and 282.6 MB in the end (delta: -182.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,491 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.62 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 100.2 MB in the beginning and 171.0 MB in the end (delta: -70.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,500 INFO L168 Benchmark]: Boogie Preprocessor took 116.56 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 166.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,501 INFO L168 Benchmark]: RCFGBuilder took 2055.99 ms. Allocated memory was 204.5 MB in the beginning and 250.6 MB in the end (delta: 46.1 MB). Free memory was 166.0 MB in the beginning and 206.3 MB in the end (delta: -40.3 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,502 INFO L168 Benchmark]: TraceAbstraction took 5839.81 ms. Allocated memory was 250.6 MB in the beginning and 329.3 MB in the end (delta: 78.6 MB). Free memory was 206.3 MB in the beginning and 282.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:17,511 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 741.62 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 100.2 MB in the beginning and 171.0 MB in the end (delta: -70.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.56 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 166.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2055.99 ms. Allocated memory was 204.5 MB in the beginning and 250.6 MB in the end (delta: 46.1 MB). Free memory was 166.0 MB in the beginning and 206.3 MB in the end (delta: -40.3 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5839.81 ms. Allocated memory was 250.6 MB in the beginning and 329.3 MB in the end (delta: 78.6 MB). Free memory was 206.3 MB in the beginning and 282.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...