/usr/bin/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:33,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:33,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:33,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:54:33,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:33,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:33,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:33,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:33,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:33,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:33,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:33,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:33,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:33,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:33,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:33,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:33,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:33,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:33,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:33,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:33,681 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 [2019-11-06 22:54:33,698 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:33,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:33,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:33,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:33,700 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:33,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:33,700 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:33,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:33,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:33,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:33,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:33,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:33,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:33,701 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:33,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:33,702 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:33,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:33,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:33,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:33,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:33,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:33,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:33,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:33,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:33,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:33,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:33,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:33,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:33,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:54:33,982 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:33,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:33,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:34,001 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:34,001 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:34,002 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label23.c [2019-11-06 22:54:34,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92470d5c/e32948dd351c44bcb815b241531f3b2b/FLAGea2c90385 [2019-11-06 22:54:34,744 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:34,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label23.c [2019-11-06 22:54:34,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92470d5c/e32948dd351c44bcb815b241531f3b2b/FLAGea2c90385 [2019-11-06 22:54:34,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92470d5c/e32948dd351c44bcb815b241531f3b2b [2019-11-06 22:54:34,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:34,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:34,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:34,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:34,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:34,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:34" (1/1) ... [2019-11-06 22:54:34,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:34, skipping insertion in model container [2019-11-06 22:54:34,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:34" (1/1) ... [2019-11-06 22:54:34,919 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:35,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:35,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:35,787 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:36,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:36,100 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:36,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36 WrapperNode [2019-11-06 22:54:36,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:36,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:36,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:36,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:36,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (1/1) ... [2019-11-06 22:54:36,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:36,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:36,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:36,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:36,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (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 [2019-11-06 22:54:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:36,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:38,730 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:38,730 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:38,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:38 BoogieIcfgContainer [2019-11-06 22:54:38,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:38,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:38,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:38,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:38,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:34" (1/3) ... [2019-11-06 22:54:38,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc70f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:38, skipping insertion in model container [2019-11-06 22:54:38,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:36" (2/3) ... [2019-11-06 22:54:38,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbc70f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:38, skipping insertion in model container [2019-11-06 22:54:38,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:38" (3/3) ... [2019-11-06 22:54:38,754 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label23.c [2019-11-06 22:54:38,765 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:38,776 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:38,787 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:38,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:38,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:38,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:38,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:38,832 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:38,832 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:38,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:38,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 22:54:38,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:38,879 INFO L410 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] [2019-11-06 22:54:38,881 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1421899030, now seen corresponding path program 1 times [2019-11-06 22:54:38,897 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:38,897 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693787290] [2019-11-06 22:54:38,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:39,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693787290] [2019-11-06 22:54:39,152 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:39,152 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:39,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595719512] [2019-11-06 22:54:39,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:39,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:39,179 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:41,546 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:41,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:41,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-06 22:54:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:41,573 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:41,573 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:41,582 INFO L630 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 [2019-11-06 22:54:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-11-06 22:54:41,677 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 37 [2019-11-06 22:54:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:41,678 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-11-06 22:54:41,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-11-06 22:54:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:54:41,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:41,686 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:41,686 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1726554019, now seen corresponding path program 1 times [2019-11-06 22:54:41,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:41,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:54:41,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:42,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:54:42,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:42,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:42,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410898557] [2019-11-06 22:54:42,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:42,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:42,041 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-11-06 22:54:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:45,086 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-11-06 22:54:45,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:45,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-06 22:54:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:45,096 INFO L225 Difference]: With dead ends: 1733 [2019-11-06 22:54:45,096 INFO L226 Difference]: Without dead ends: 1057 [2019-11-06 22:54:45,099 INFO L630 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 [2019-11-06 22:54:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-11-06 22:54:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-11-06 22:54:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:54:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-11-06 22:54:45,150 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 144 [2019-11-06 22:54:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:45,151 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-11-06 22:54:45,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-11-06 22:54:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:54:45,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:45,156 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:45,156 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash -117387014, now seen corresponding path program 1 times [2019-11-06 22:54:45,157 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:45,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104755646] [2019-11-06 22:54:45,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:45,341 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104755646] [2019-11-06 22:54:45,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:45,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:45,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545464843] [2019-11-06 22:54:45,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:45,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:45,344 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-11-06 22:54:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:48,648 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-11-06 22:54:48,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:48,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2019-11-06 22:54:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:48,668 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 22:54:48,668 INFO L226 Difference]: Without dead ends: 2097 [2019-11-06 22:54:48,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-11-06 22:54:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-11-06 22:54:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-11-06 22:54:48,753 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 147 [2019-11-06 22:54:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:48,755 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-11-06 22:54:48,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-11-06 22:54:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-11-06 22:54:48,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:48,769 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:48,769 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash -462230653, now seen corresponding path program 1 times [2019-11-06 22:54:48,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:48,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960773898] [2019-11-06 22:54:48,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 60 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:49,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960773898] [2019-11-06 22:54:49,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199471395] [2019-11-06 22:54:49,039 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 [2019-11-06 22:54:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:49,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:49,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:54:49,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 60 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:49,584 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:49,584 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:54:49,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975258490] [2019-11-06 22:54:49,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:49,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:54:49,586 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-11-06 22:54:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:52,993 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-11-06 22:54:52,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:52,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2019-11-06 22:54:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:53,016 INFO L225 Difference]: With dead ends: 6247 [2019-11-06 22:54:53,016 INFO L226 Difference]: Without dead ends: 4172 [2019-11-06 22:54:53,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 519 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:54:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-11-06 22:54:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-11-06 22:54:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-11-06 22:54:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-11-06 22:54:53,129 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 262 [2019-11-06 22:54:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:53,130 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-11-06 22:54:53,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-11-06 22:54:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2019-11-06 22:54:53,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:53,141 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:53,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:53,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1552944961, now seen corresponding path program 1 times [2019-11-06 22:54:53,345 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:53,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395358567] [2019-11-06 22:54:53,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 95 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:54:53,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395358567] [2019-11-06 22:54:53,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446968694] [2019-11-06 22:54:53,949 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 [2019-11-06 22:54:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:54,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:54,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:54:54,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 192 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:54:54,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1297142791] [2019-11-06 22:54:54,704 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 471 [2019-11-06 22:54:54,765 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:54,766 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:09,936 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:09,939 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:55:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:09,944 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates