/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:48:14,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:48:14,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:48:14,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:48:14,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:48:14,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:48:14,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:48:14,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:48:14,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:48:14,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:48:14,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:48:14,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:48:14,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:48:14,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:48:14,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:48:14,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:48:14,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:48:14,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:48:14,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:48:14,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:48:14,436 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 22:48:14,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:48:14,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:48:14,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:48:14,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:48:14,458 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:48:14,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:48:14,458 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:48:14,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:48:14,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:48:14,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:48:14,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:48:14,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:48:14,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:48:14,461 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:48:14,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:48:14,461 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:48:14,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:48:14,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:48:14,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:48:14,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:48:14,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:48:14,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:48:14,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:48:14,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:48:14,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:48:14,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:48:14,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:48:14,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:48:14,464 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 22:48:14,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:48:14,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:48:14,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:48:14,740 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:48:14,740 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:48:14,741 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-11-06 22:48:14,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868d77deb/e187a6e9baeb41d4a6c96ef62fa38b1b/FLAG0f098bc44 [2019-11-06 22:48:15,394 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:48:15,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-11-06 22:48:15,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868d77deb/e187a6e9baeb41d4a6c96ef62fa38b1b/FLAG0f098bc44 [2019-11-06 22:48:15,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868d77deb/e187a6e9baeb41d4a6c96ef62fa38b1b [2019-11-06 22:48:15,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:48:15,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:48:15,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:15,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:48:15,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:48:15,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:15" (1/1) ... [2019-11-06 22:48:15,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679fbec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:15, skipping insertion in model container [2019-11-06 22:48:15,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:15" (1/1) ... [2019-11-06 22:48:15,657 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:48:15,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:48:16,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:16,362 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:48:16,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:16,570 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:48:16,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16 WrapperNode [2019-11-06 22:48:16,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:16,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:48:16,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:48:16,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:48:16,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:48:16,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:48:16,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:48:16,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:48:16,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (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 22:48:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:48:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:48:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:48:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:48:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:48:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:48:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:48:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:48:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:48:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:48:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:48:18,897 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:48:18,897 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:48:18,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:18 BoogieIcfgContainer [2019-11-06 22:48:18,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:48:18,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:48:18,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:48:18,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:48:18,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:15" (1/3) ... [2019-11-06 22:48:18,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fa5605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:18, skipping insertion in model container [2019-11-06 22:48:18,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (2/3) ... [2019-11-06 22:48:18,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fa5605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:18, skipping insertion in model container [2019-11-06 22:48:18,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:18" (3/3) ... [2019-11-06 22:48:18,908 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label59.c [2019-11-06 22:48:18,918 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:48:18,927 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:48:18,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:48:18,969 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:48:18,969 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:48:18,969 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:48:18,969 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:48:18,969 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:48:18,970 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:48:18,970 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:48:18,970 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:48:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:48:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 22:48:19,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:19,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:48:19,008 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -912328190, now seen corresponding path program 1 times [2019-11-06 22:48:19,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:19,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327045268] [2019-11-06 22:48:19,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:19,444 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 22:48:19,445 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327045268] [2019-11-06 22:48:19,446 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:19,446 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:48:19,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063447777] [2019-11-06 22:48:19,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:48:19,454 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:48:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:48:19,471 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:48:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:20,943 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-11-06 22:48:20,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:48:20,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-11-06 22:48:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:20,963 INFO L225 Difference]: With dead ends: 782 [2019-11-06 22:48:20,963 INFO L226 Difference]: Without dead ends: 428 [2019-11-06 22:48:20,970 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 22:48:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-11-06 22:48:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-11-06 22:48:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:48:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-11-06 22:48:21,046 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 65 [2019-11-06 22:48:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:21,047 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-11-06 22:48:21,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:48:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-11-06 22:48:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:48:21,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:21,054 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, 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] [2019-11-06 22:48:21,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -588923191, now seen corresponding path program 1 times [2019-11-06 22:48:21,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:21,055 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470570099] [2019-11-06 22:48:21,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:21,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470570099] [2019-11-06 22:48:21,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:21,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:21,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948453035] [2019-11-06 22:48:21,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:21,358 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:21,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:21,359 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-11-06 22:48:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:23,301 INFO L93 Difference]: Finished difference Result 1255 states and 2035 transitions. [2019-11-06 22:48:23,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:48:23,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-11-06 22:48:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:23,315 INFO L225 Difference]: With dead ends: 1255 [2019-11-06 22:48:23,316 INFO L226 Difference]: Without dead ends: 841 [2019-11-06 22:48:23,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:48:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2019-11-06 22:48:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 817. [2019-11-06 22:48:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-11-06 22:48:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1174 transitions. [2019-11-06 22:48:23,365 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1174 transitions. Word has length 134 [2019-11-06 22:48:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:23,366 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1174 transitions. [2019-11-06 22:48:23,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1174 transitions. [2019-11-06 22:48:23,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:48:23,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:23,370 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, 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] [2019-11-06 22:48:23,371 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash 578512354, now seen corresponding path program 1 times [2019-11-06 22:48:23,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:23,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606901883] [2019-11-06 22:48:23,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:23,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606901883] [2019-11-06 22:48:23,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:23,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:23,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490426538] [2019-11-06 22:48:23,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:23,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:23,558 INFO L87 Difference]: Start difference. First operand 817 states and 1174 transitions. Second operand 6 states. [2019-11-06 22:48:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:25,232 INFO L93 Difference]: Finished difference Result 2046 states and 2973 transitions. [2019-11-06 22:48:25,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:48:25,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-11-06 22:48:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:25,241 INFO L225 Difference]: With dead ends: 2046 [2019-11-06 22:48:25,241 INFO L226 Difference]: Without dead ends: 1235 [2019-11-06 22:48:25,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:48:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-11-06 22:48:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-11-06 22:48:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-11-06 22:48:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1725 transitions. [2019-11-06 22:48:25,295 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1725 transitions. Word has length 137 [2019-11-06 22:48:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:25,304 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1725 transitions. [2019-11-06 22:48:25,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1725 transitions. [2019-11-06 22:48:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:48:25,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:25,316 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, 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] [2019-11-06 22:48:25,317 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2098670063, now seen corresponding path program 1 times [2019-11-06 22:48:25,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:25,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844670905] [2019-11-06 22:48:25,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:25,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844670905] [2019-11-06 22:48:25,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246838892] [2019-11-06 22:48:25,650 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 22:48:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:25,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:48:25,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:25,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:25,997 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:26,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:26,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:26,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:26,396 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:48:26,396 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 13 [2019-11-06 22:48:26,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007637303] [2019-11-06 22:48:26,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:48:26,397 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:26,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:48:26,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:48:26,398 INFO L87 Difference]: Start difference. First operand 1221 states and 1725 transitions. Second operand 7 states. [2019-11-06 22:48:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:29,008 INFO L93 Difference]: Finished difference Result 4051 states and 6044 transitions. [2019-11-06 22:48:29,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:48:29,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2019-11-06 22:48:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:29,026 INFO L225 Difference]: With dead ends: 4051 [2019-11-06 22:48:29,026 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 22:48:29,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:48:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 22:48:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-11-06 22:48:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-11-06 22:48:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3710 transitions. [2019-11-06 22:48:29,118 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3710 transitions. Word has length 138 [2019-11-06 22:48:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:29,121 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3710 transitions. [2019-11-06 22:48:29,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:48:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3710 transitions. [2019-11-06 22:48:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 22:48:29,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:29,126 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, 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] [2019-11-06 22:48:29,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:29,331 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1755774456, now seen corresponding path program 1 times [2019-11-06 22:48:29,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:29,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864316023] [2019-11-06 22:48:29,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:29,490 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864316023] [2019-11-06 22:48:29,490 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:29,490 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:48:29,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917227280] [2019-11-06 22:48:29,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:48:29,491 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:48:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:48:29,492 INFO L87 Difference]: Start difference. First operand 2789 states and 3710 transitions. Second operand 3 states. [2019-11-06 22:48:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:30,509 INFO L93 Difference]: Finished difference Result 7093 states and 9721 transitions. [2019-11-06 22:48:30,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:48:30,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2019-11-06 22:48:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:30,537 INFO L225 Difference]: With dead ends: 7093 [2019-11-06 22:48:30,537 INFO L226 Difference]: Without dead ends: 4310 [2019-11-06 22:48:30,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:48:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-11-06 22:48:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4310. [2019-11-06 22:48:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4310 states. [2019-11-06 22:48:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 5505 transitions. [2019-11-06 22:48:30,686 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 5505 transitions. Word has length 196 [2019-11-06 22:48:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:30,688 INFO L462 AbstractCegarLoop]: Abstraction has 4310 states and 5505 transitions. [2019-11-06 22:48:30,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:48:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 5505 transitions. [2019-11-06 22:48:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-11-06 22:48:30,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:30,695 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, 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] [2019-11-06 22:48:30,696 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2033318321, now seen corresponding path program 1 times [2019-11-06 22:48:30,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:30,697 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979855923] [2019-11-06 22:48:30,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:30,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979855923] [2019-11-06 22:48:30,916 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:30,916 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389399299] [2019-11-06 22:48:30,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:30,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:30,918 INFO L87 Difference]: Start difference. First operand 4310 states and 5505 transitions. Second operand 4 states. [2019-11-06 22:48:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:33,017 INFO L93 Difference]: Finished difference Result 11285 states and 14911 transitions. [2019-11-06 22:48:33,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:33,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-11-06 22:48:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:33,055 INFO L225 Difference]: With dead ends: 11285 [2019-11-06 22:48:33,055 INFO L226 Difference]: Without dead ends: 6981 [2019-11-06 22:48:33,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2019-11-06 22:48:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 5830. [2019-11-06 22:48:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5830 states. [2019-11-06 22:48:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5830 states to 5830 states and 7357 transitions. [2019-11-06 22:48:33,225 INFO L78 Accepts]: Start accepts. Automaton has 5830 states and 7357 transitions. Word has length 212 [2019-11-06 22:48:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:33,225 INFO L462 AbstractCegarLoop]: Abstraction has 5830 states and 7357 transitions. [2019-11-06 22:48:33,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5830 states and 7357 transitions. [2019-11-06 22:48:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-06 22:48:33,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:33,233 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:33,234 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1831339210, now seen corresponding path program 1 times [2019-11-06 22:48:33,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:33,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028058365] [2019-11-06 22:48:33,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:33,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028058365] [2019-11-06 22:48:33,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147635296] [2019-11-06 22:48:33,533 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 22:48:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:33,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:48:33,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:33,748 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:33,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [556248596] [2019-11-06 22:48:33,920 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 293 [2019-11-06 22:48:33,970 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:48:33,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)