/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/Problem11_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:30,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:30,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:30,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:30,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:30,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:30,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:30,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:30,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:30,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:30,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:30,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:30,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:30,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:30,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:30,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:30,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:47:30,239 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 22:47:30,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:30,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:30,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:30,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:30,260 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:30,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:30,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:30,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:30,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:30,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:30,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:30,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:30,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:30,263 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:30,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:30,263 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:30,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:30,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:30,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:30,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:30,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:30,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:30,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:30,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:30,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:30,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:30,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:30,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:30,266 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 22:47:30,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:30,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:30,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:30,557 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:30,558 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:30,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-11-06 22:47:30,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc42ab7f5/57b900103fde473fb9f8092046a18260/FLAG818c82e0e [2019-11-06 22:47:31,235 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:31,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-11-06 22:47:31,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc42ab7f5/57b900103fde473fb9f8092046a18260/FLAG818c82e0e [2019-11-06 22:47:31,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc42ab7f5/57b900103fde473fb9f8092046a18260 [2019-11-06 22:47:31,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:31,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:31,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:31,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:31,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:31,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31, skipping insertion in model container [2019-11-06 22:47:31,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:31,593 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:32,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:32,264 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:32,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:32,596 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:32,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32 WrapperNode [2019-11-06 22:47:32,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:32,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:32,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:32,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:32,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (1/1) ... [2019-11-06 22:47:32,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:32,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:32,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:32,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:32,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (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 22:47:32,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:32,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:32,855 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:34,750 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:34,751 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:34,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:34 BoogieIcfgContainer [2019-11-06 22:47:34,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:34,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:34,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:34,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:34,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:31" (1/3) ... [2019-11-06 22:47:34,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:34, skipping insertion in model container [2019-11-06 22:47:34,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:32" (2/3) ... [2019-11-06 22:47:34,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:34, skipping insertion in model container [2019-11-06 22:47:34,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:34" (3/3) ... [2019-11-06 22:47:34,761 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label44.c [2019-11-06 22:47:34,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:34,779 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:34,791 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:34,820 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:34,820 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:34,821 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:34,821 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:34,821 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:34,821 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:34,822 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:34,822 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:47:34,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:34,856 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] [2019-11-06 22:47:34,857 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1276641867, now seen corresponding path program 1 times [2019-11-06 22:47:34,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:34,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695086557] [2019-11-06 22:47:34,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:35,174 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 22:47:35,175 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695086557] [2019-11-06 22:47:35,176 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:35,176 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:35,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43610781] [2019-11-06 22:47:35,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:35,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:35,202 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:47:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:37,715 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-11-06 22:47:37,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:37,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:47:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:37,754 INFO L225 Difference]: With dead ends: 975 [2019-11-06 22:47:37,754 INFO L226 Difference]: Without dead ends: 616 [2019-11-06 22:47:37,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-11-06 22:47:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-11-06 22:47:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-11-06 22:47:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-11-06 22:47:37,901 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 32 [2019-11-06 22:47:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:37,902 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-11-06 22:47:37,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-11-06 22:47:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 22:47:37,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:37,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:37,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 201462154, now seen corresponding path program 1 times [2019-11-06 22:47:37,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:37,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569744177] [2019-11-06 22:47:37,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:38,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569744177] [2019-11-06 22:47:38,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:38,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:38,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115496024] [2019-11-06 22:47:38,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:38,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:38,225 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-11-06 22:47:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:39,951 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-11-06 22:47:39,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:39,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-06 22:47:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:39,957 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:47:39,957 INFO L226 Difference]: Without dead ends: 825 [2019-11-06 22:47:39,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-11-06 22:47:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-11-06 22:47:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-11-06 22:47:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-11-06 22:47:39,998 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 104 [2019-11-06 22:47:39,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:39,998 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-11-06 22:47:39,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-11-06 22:47:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-06 22:47:40,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:40,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:40,001 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1596761827, now seen corresponding path program 1 times [2019-11-06 22:47:40,002 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:40,002 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040548671] [2019-11-06 22:47:40,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:40,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040548671] [2019-11-06 22:47:40,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065776348] [2019-11-06 22:47:40,172 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 22:47:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:40,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:47:40,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:40,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:40,462 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:40,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:40,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:40,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:40,799 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:40,800 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-06 22:47:40,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492870454] [2019-11-06 22:47:40,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:47:40,801 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:47:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:47:40,802 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 7 states. [2019-11-06 22:47:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:43,472 INFO L93 Difference]: Finished difference Result 2829 states and 4164 transitions. [2019-11-06 22:47:43,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:47:43,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 105 [2019-11-06 22:47:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:43,495 INFO L225 Difference]: With dead ends: 2829 [2019-11-06 22:47:43,495 INFO L226 Difference]: Without dead ends: 2021 [2019-11-06 22:47:43,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:47:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-11-06 22:47:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1992. [2019-11-06 22:47:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2019-11-06 22:47:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2629 transitions. [2019-11-06 22:47:43,606 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2629 transitions. Word has length 105 [2019-11-06 22:47:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:43,606 INFO L462 AbstractCegarLoop]: Abstraction has 1992 states and 2629 transitions. [2019-11-06 22:47:43,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:47:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2629 transitions. [2019-11-06 22:47:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 22:47:43,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:43,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:43,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:43,830 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -741406572, now seen corresponding path program 1 times [2019-11-06 22:47:43,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:43,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913875644] [2019-11-06 22:47:43,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913875644] [2019-11-06 22:47:44,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824687323] [2019-11-06 22:47:44,148 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 22:47:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:47:44,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,285 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:44,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-06 22:47:44,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343795360] [2019-11-06 22:47:44,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:44,381 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:44,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:47:44,382 INFO L87 Difference]: Start difference. First operand 1992 states and 2629 transitions. Second operand 4 states. [2019-11-06 22:47:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:46,095 INFO L93 Difference]: Finished difference Result 5541 states and 7566 transitions. [2019-11-06 22:47:46,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:46,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-11-06 22:47:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:46,131 INFO L225 Difference]: With dead ends: 5541 [2019-11-06 22:47:46,132 INFO L226 Difference]: Without dead ends: 3555 [2019-11-06 22:47:46,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:47:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2019-11-06 22:47:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2965. [2019-11-06 22:47:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2019-11-06 22:47:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3974 transitions. [2019-11-06 22:47:46,292 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3974 transitions. Word has length 163 [2019-11-06 22:47:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:46,296 INFO L462 AbstractCegarLoop]: Abstraction has 2965 states and 3974 transitions. [2019-11-06 22:47:46,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3974 transitions. [2019-11-06 22:47:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:47:46,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:46,307 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:46,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:46,513 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 967076156, now seen corresponding path program 1 times [2019-11-06 22:47:46,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:46,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543830183] [2019-11-06 22:47:46,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:46,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543830183] [2019-11-06 22:47:46,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009960314] [2019-11-06 22:47:46,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:47,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:47:47,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:47,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:47,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:47,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:49,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:49,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:49,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:49,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:49,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:49,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [159975879] [2019-11-06 22:47:49,376 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-11-06 22:47:49,429 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:49,429 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)