/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_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:22,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:22,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:22,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:22,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:22,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:22,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:22,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:22,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:22,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:22,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:22,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:22,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:22,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:22,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:22,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:22,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:22,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:22,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:22,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:22,116 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 22:55:22,130 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:22,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:22,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:22,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:22,132 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:22,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:22,132 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:22,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:22,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:22,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:22,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:22,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:22,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:22,134 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:22,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:22,134 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:22,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:22,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:22,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:22,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:22,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:22,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:22,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:22,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:22,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:22,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:22,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:22,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:22,137 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 22:55:22,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:22,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:22,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:22,441 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:22,441 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:22,442 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-06 22:55:22,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858791f92/3ced3f00ffee4544bda6e5be037fcd38/FLAG6cf2cb093 [2019-11-06 22:55:23,173 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:23,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-06 22:55:23,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858791f92/3ced3f00ffee4544bda6e5be037fcd38/FLAG6cf2cb093 [2019-11-06 22:55:23,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858791f92/3ced3f00ffee4544bda6e5be037fcd38 [2019-11-06 22:55:23,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:23,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:23,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:23,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:23,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:23,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:23" (1/1) ... [2019-11-06 22:55:23,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5d51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:23, skipping insertion in model container [2019-11-06 22:55:23,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:23" (1/1) ... [2019-11-06 22:55:23,368 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:23,438 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:24,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:24,435 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:24,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:24,727 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:24,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24 WrapperNode [2019-11-06 22:55:24,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:24,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:24,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:24,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:24,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:24,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:24,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:24,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:24,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (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 22:55:25,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:27,311 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:27,312 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:27,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:27 BoogieIcfgContainer [2019-11-06 22:55:27,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:27,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:27,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:27,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:27,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:23" (1/3) ... [2019-11-06 22:55:27,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4263d7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:27, skipping insertion in model container [2019-11-06 22:55:27,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24" (2/3) ... [2019-11-06 22:55:27,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4263d7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:27, skipping insertion in model container [2019-11-06 22:55:27,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:27" (3/3) ... [2019-11-06 22:55:27,322 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2019-11-06 22:55:27,332 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:27,341 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:27,354 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:27,388 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:27,388 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:27,388 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:27,388 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:27,389 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:27,389 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:27,389 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:27,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:55:27,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:27,443 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, 1, 1, 1, 1, 1] [2019-11-06 22:55:27,445 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1949415187, now seen corresponding path program 1 times [2019-11-06 22:55:27,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:27,463 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412947813] [2019-11-06 22:55:27,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:27,788 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 22:55:27,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412947813] [2019-11-06 22:55:27,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:27,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:27,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088861935] [2019-11-06 22:55:27,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:27,800 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:27,817 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:30,041 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:30,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:30,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-11-06 22:55:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:30,069 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:30,070 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:30,080 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 22:55:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-11-06 22:55:30,202 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 42 [2019-11-06 22:55:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:30,204 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-11-06 22:55:30,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-11-06 22:55:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:55:30,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:30,221 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, 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] [2019-11-06 22:55:30,222 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash -299851275, now seen corresponding path program 1 times [2019-11-06 22:55:30,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:30,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941974588] [2019-11-06 22:55:30,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:30,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941974588] [2019-11-06 22:55:30,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:30,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:30,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002306870] [2019-11-06 22:55:30,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:30,623 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:30,624 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-11-06 22:55:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:33,622 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-11-06 22:55:33,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:33,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-11-06 22:55:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:33,632 INFO L225 Difference]: With dead ends: 1733 [2019-11-06 22:55:33,632 INFO L226 Difference]: Without dead ends: 1057 [2019-11-06 22:55:33,635 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 22:55:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-11-06 22:55:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-11-06 22:55:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:55:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-11-06 22:55:33,682 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 149 [2019-11-06 22:55:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:33,683 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-11-06 22:55:33,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-11-06 22:55:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:55:33,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:33,686 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, 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] [2019-11-06 22:55:33,687 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1372793628, now seen corresponding path program 1 times [2019-11-06 22:55:33,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:33,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997728096] [2019-11-06 22:55:33,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:33,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997728096] [2019-11-06 22:55:33,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:33,894 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:33,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580858802] [2019-11-06 22:55:33,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:33,895 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:33,896 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-11-06 22:55:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:37,864 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-11-06 22:55:37,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:37,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-11-06 22:55:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:37,880 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 22:55:37,880 INFO L226 Difference]: Without dead ends: 2097 [2019-11-06 22:55:37,883 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 22:55:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-11-06 22:55:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-11-06 22:55:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:55:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-11-06 22:55:37,962 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 152 [2019-11-06 22:55:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:37,963 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-11-06 22:55:37,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-11-06 22:55:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-06 22:55:37,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:37,969 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:37,969 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1534192236, now seen corresponding path program 1 times [2019-11-06 22:55:37,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:37,970 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916665267] [2019-11-06 22:55:37,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:38,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916665267] [2019-11-06 22:55:38,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612971248] [2019-11-06 22:55:38,303 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 22:55:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:38,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:38,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 22:55:38,679 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:38,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:38,854 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:38,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794594558] [2019-11-06 22:55:38,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:38,855 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:38,856 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-11-06 22:55:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:41,707 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-11-06 22:55:41,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:41,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2019-11-06 22:55:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:41,735 INFO L225 Difference]: With dead ends: 6247 [2019-11-06 22:55:41,735 INFO L226 Difference]: Without dead ends: 4172 [2019-11-06 22:55:41,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 529 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 22:55:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-11-06 22:55:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-11-06 22:55:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-11-06 22:55:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-11-06 22:55:41,872 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 267 [2019-11-06 22:55:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:41,873 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-11-06 22:55:41,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-11-06 22:55:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2019-11-06 22:55:41,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:41,887 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, 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, 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 22:55:42,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:42,094 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1437688633, now seen corresponding path program 1 times [2019-11-06 22:55:42,095 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:42,095 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578248082] [2019-11-06 22:55:42,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 110 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:55:42,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578248082] [2019-11-06 22:55:42,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848649171] [2019-11-06 22:55:42,622 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 22:55:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:42,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:42,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 382 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 22:55:43,110 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 207 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:55:43,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1772766038] [2019-11-06 22:55:43,407 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 476 [2019-11-06 22:55:43,474 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:43,474 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:59,605 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:59,607 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 22:55:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:59,611 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates