/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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:10,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:10,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:10,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:54:10,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:10,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:10,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:10,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:10,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:10,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:10,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:10,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:10,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:10,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:10,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:10,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:10,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:10,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:10,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:10,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:10,085 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 22:54:10,107 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:10,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:10,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:10,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:10,110 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:10,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:10,111 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:10,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:10,113 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:10,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:10,114 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:10,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:10,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:10,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:10,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:10,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:10,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:10,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:10,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:10,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:10,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:10,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:10,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:10,116 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 22:54:10,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:10,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:10,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:10,422 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:10,422 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:10,423 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-11-06 22:54:10,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ff0b12f/bbb312cf9b9c4b2ea2307314411e1d75/FLAG10323e45f [2019-11-06 22:54:11,166 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:11,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-11-06 22:54:11,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ff0b12f/bbb312cf9b9c4b2ea2307314411e1d75/FLAG10323e45f [2019-11-06 22:54:11,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ff0b12f/bbb312cf9b9c4b2ea2307314411e1d75 [2019-11-06 22:54:11,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:11,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:11,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:11,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:11,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:11,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:11" (1/1) ... [2019-11-06 22:54:11,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc02f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:11, skipping insertion in model container [2019-11-06 22:54:11,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:11" (1/1) ... [2019-11-06 22:54:11,413 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:11,504 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:12,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:12,437 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:12,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:12,734 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:12,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12 WrapperNode [2019-11-06 22:54:12,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:12,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:12,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:12,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:12,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (1/1) ... [2019-11-06 22:54:12,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:12,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:12,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:12,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:12,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (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 22:54:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:15,405 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:15,406 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:15,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:15 BoogieIcfgContainer [2019-11-06 22:54:15,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:15,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:15,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:15,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:15,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:11" (1/3) ... [2019-11-06 22:54:15,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1271d573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:15, skipping insertion in model container [2019-11-06 22:54:15,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:12" (2/3) ... [2019-11-06 22:54:15,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1271d573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:15, skipping insertion in model container [2019-11-06 22:54:15,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:15" (3/3) ... [2019-11-06 22:54:15,415 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-11-06 22:54:15,425 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:15,434 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:15,446 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:15,475 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:15,476 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:15,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:15,476 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:15,476 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:15,476 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:15,476 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:15,477 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 22:54:15,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:15,516 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, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:15,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-11-06 22:54:15,533 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:15,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082613859] [2019-11-06 22:54:15,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:15,872 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 22:54:15,873 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082613859] [2019-11-06 22:54:15,873 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:15,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:15,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702857148] [2019-11-06 22:54:15,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:15,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:15,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:15,903 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:18,079 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:18,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:18,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-11-06 22:54:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:18,107 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:18,108 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:18,119 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 22:54:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-11-06 22:54:18,248 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 48 [2019-11-06 22:54:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:18,249 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-11-06 22:54:18,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-11-06 22:54:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:54:18,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:18,255 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, 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] [2019-11-06 22:54:18,256 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-11-06 22:54:18,257 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:18,257 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789652902] [2019-11-06 22:54:18,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:18,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789652902] [2019-11-06 22:54:18,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:18,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:18,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515168843] [2019-11-06 22:54:18,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:18,571 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:18,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:18,572 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-11-06 22:54:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:25,182 INFO L93 Difference]: Finished difference Result 2808 states and 4912 transitions. [2019-11-06 22:54:25,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:54:25,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:54:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:25,206 INFO L225 Difference]: With dead ends: 2808 [2019-11-06 22:54:25,207 INFO L226 Difference]: Without dead ends: 2132 [2019-11-06 22:54:25,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:54:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2019-11-06 22:54:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2087. [2019-11-06 22:54:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-11-06 22:54:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-11-06 22:54:25,364 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 123 [2019-11-06 22:54:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:25,367 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-11-06 22:54:25,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-11-06 22:54:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:54:25,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:25,382 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, 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] [2019-11-06 22:54:25,382 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-11-06 22:54:25,385 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:25,385 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53858210] [2019-11-06 22:54:25,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:25,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53858210] [2019-11-06 22:54:25,619 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:25,619 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:25,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253761757] [2019-11-06 22:54:25,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:25,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:25,621 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-11-06 22:54:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:28,625 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-11-06 22:54:28,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:54:28,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-11-06 22:54:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:28,648 INFO L225 Difference]: With dead ends: 5623 [2019-11-06 22:54:28,649 INFO L226 Difference]: Without dead ends: 3542 [2019-11-06 22:54:28,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:54:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-11-06 22:54:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-11-06 22:54:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-11-06 22:54:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5697 transitions. [2019-11-06 22:54:28,758 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5697 transitions. Word has length 127 [2019-11-06 22:54:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:28,759 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5697 transitions. [2019-11-06 22:54:28,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5697 transitions. [2019-11-06 22:54:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:54:28,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:28,761 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, 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] [2019-11-06 22:54:28,762 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 939099681, now seen corresponding path program 1 times [2019-11-06 22:54:28,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:28,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97957640] [2019-11-06 22:54:28,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:28,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97957640] [2019-11-06 22:54:28,950 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:28,950 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:28,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756120423] [2019-11-06 22:54:28,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:28,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:28,952 INFO L87 Difference]: Start difference. First operand 3503 states and 5697 transitions. Second operand 6 states. [2019-11-06 22:54:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:31,444 INFO L93 Difference]: Finished difference Result 7817 states and 13132 transitions. [2019-11-06 22:54:31,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:31,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-11-06 22:54:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:31,469 INFO L225 Difference]: With dead ends: 7817 [2019-11-06 22:54:31,469 INFO L226 Difference]: Without dead ends: 4320 [2019-11-06 22:54:31,480 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 22:54:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2019-11-06 22:54:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4279. [2019-11-06 22:54:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2019-11-06 22:54:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6768 transitions. [2019-11-06 22:54:31,600 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6768 transitions. Word has length 129 [2019-11-06 22:54:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:31,601 INFO L462 AbstractCegarLoop]: Abstraction has 4279 states and 6768 transitions. [2019-11-06 22:54:31,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6768 transitions. [2019-11-06 22:54:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:54:31,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:31,603 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, 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] [2019-11-06 22:54:31,603 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1902020488, now seen corresponding path program 1 times [2019-11-06 22:54:31,604 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:31,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986635985] [2019-11-06 22:54:31,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:31,757 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986635985] [2019-11-06 22:54:31,758 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:31,758 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672337850] [2019-11-06 22:54:31,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:31,760 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:31,761 INFO L87 Difference]: Start difference. First operand 4279 states and 6768 transitions. Second operand 6 states. [2019-11-06 22:54:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:34,463 INFO L93 Difference]: Finished difference Result 11663 states and 19030 transitions. [2019-11-06 22:54:34,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:34,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-11-06 22:54:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:34,503 INFO L225 Difference]: With dead ends: 11663 [2019-11-06 22:54:34,505 INFO L226 Difference]: Without dead ends: 7390 [2019-11-06 22:54:34,520 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 22:54:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2019-11-06 22:54:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7362. [2019-11-06 22:54:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7362 states. [2019-11-06 22:54:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 10905 transitions. [2019-11-06 22:54:34,722 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 10905 transitions. Word has length 132 [2019-11-06 22:54:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:34,723 INFO L462 AbstractCegarLoop]: Abstraction has 7362 states and 10905 transitions. [2019-11-06 22:54:34,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 10905 transitions. [2019-11-06 22:54:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:54:34,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:34,727 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, 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 22:54:34,727 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1440393839, now seen corresponding path program 1 times [2019-11-06 22:54:34,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:34,728 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358532455] [2019-11-06 22:54:34,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:35,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358532455] [2019-11-06 22:54:35,015 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:35,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:35,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43221443] [2019-11-06 22:54:35,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:35,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:35,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:35,017 INFO L87 Difference]: Start difference. First operand 7362 states and 10905 transitions. Second operand 6 states. [2019-11-06 22:54:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:39,171 INFO L93 Difference]: Finished difference Result 16133 states and 24072 transitions. [2019-11-06 22:54:39,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:39,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-11-06 22:54:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:39,219 INFO L225 Difference]: With dead ends: 16133 [2019-11-06 22:54:39,219 INFO L226 Difference]: Without dead ends: 8777 [2019-11-06 22:54:39,236 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 22:54:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2019-11-06 22:54:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7746. [2019-11-06 22:54:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7746 states. [2019-11-06 22:54:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10527 transitions. [2019-11-06 22:54:39,433 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10527 transitions. Word has length 137 [2019-11-06 22:54:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:39,433 INFO L462 AbstractCegarLoop]: Abstraction has 7746 states and 10527 transitions. [2019-11-06 22:54:39,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10527 transitions. [2019-11-06 22:54:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:54:39,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:39,435 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, 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] [2019-11-06 22:54:39,435 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash -37681811, now seen corresponding path program 1 times [2019-11-06 22:54:39,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:39,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226186013] [2019-11-06 22:54:39,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:54:39,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226186013] [2019-11-06 22:54:39,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140531456] [2019-11-06 22:54:39,532 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 22:54:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:39,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:39,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:39,699 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:39,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:54:39,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:54:39,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105342094] [2019-11-06 22:54:39,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:39,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:39,762 INFO L87 Difference]: Start difference. First operand 7746 states and 10527 transitions. Second operand 4 states. [2019-11-06 22:54:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:42,845 INFO L93 Difference]: Finished difference Result 22600 states and 31225 transitions. [2019-11-06 22:54:42,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:42,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-06 22:54:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:42,922 INFO L225 Difference]: With dead ends: 22600 [2019-11-06 22:54:42,923 INFO L226 Difference]: Without dead ends: 14860 [2019-11-06 22:54:42,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14860 states. [2019-11-06 22:54:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14860 to 12439. [2019-11-06 22:54:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12439 states. [2019-11-06 22:54:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 16201 transitions. [2019-11-06 22:54:43,506 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 16201 transitions. Word has length 139 [2019-11-06 22:54:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:43,507 INFO L462 AbstractCegarLoop]: Abstraction has 12439 states and 16201 transitions. [2019-11-06 22:54:43,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 16201 transitions. [2019-11-06 22:54:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2019-11-06 22:54:43,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:43,533 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:43,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:43,737 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1505126243, now seen corresponding path program 1 times [2019-11-06 22:54:43,739 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:43,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377244279] [2019-11-06 22:54:43,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 314 proven. 155 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2019-11-06 22:54:44,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377244279] [2019-11-06 22:54:44,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652066736] [2019-11-06 22:54:44,560 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 22:54:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:44,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:44,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-11-06 22:54:45,378 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 314 proven. 155 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2019-11-06 22:54:45,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1971820267] [2019-11-06 22:54:45,921 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 599 [2019-11-06 22:54:46,013 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:46,013 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)