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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:23,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:23,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:23,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:08:23,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:23,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:23,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:23,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:23,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:23,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:23,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:23,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:23,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:23,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:23,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:23,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:23,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:23,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:23,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:23,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:23,843 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 [2019-10-15 00:08:23,857 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:23,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:23,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:23,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:23,860 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:23,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:23,861 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:23,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:23,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:23,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:23,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:23,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:23,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:23,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:23,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:23,863 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:23,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:23,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:23,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:23,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:23,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:23,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:23,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:23,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:23,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:23,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:23,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:23,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:23,866 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 [2019-10-15 00:08:24,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:24,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:24,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:24,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:24,154 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:24,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-15 00:08:24,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7266299/14e6d45d149d4c2496177eff55ead42c/FLAGbff35b95f [2019-10-15 00:08:24,893 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:24,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-15 00:08:24,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7266299/14e6d45d149d4c2496177eff55ead42c/FLAGbff35b95f [2019-10-15 00:08:25,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7266299/14e6d45d149d4c2496177eff55ead42c [2019-10-15 00:08:25,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:25,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:25,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:25,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:25,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:25,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:25" (1/1) ... [2019-10-15 00:08:25,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:25, skipping insertion in model container [2019-10-15 00:08:25,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:25" (1/1) ... [2019-10-15 00:08:25,131 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:25,204 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:25,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:25,968 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:26,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:26,320 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:26,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26 WrapperNode [2019-10-15 00:08:26,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:26,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:26,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:26,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:26,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (1/1) ... [2019-10-15 00:08:26,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:26,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:26,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:26,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:26,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (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 [2019-10-15 00:08:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:26,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:26,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:26,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:26,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:26,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:26,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:29,344 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:29,344 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:29,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:29 BoogieIcfgContainer [2019-10-15 00:08:29,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:29,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:29,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:29,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:29,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:25" (1/3) ... [2019-10-15 00:08:29,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b802ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:29, skipping insertion in model container [2019-10-15 00:08:29,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:26" (2/3) ... [2019-10-15 00:08:29,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b802ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:29, skipping insertion in model container [2019-10-15 00:08:29,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:29" (3/3) ... [2019-10-15 00:08:29,371 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label19.c [2019-10-15 00:08:29,382 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:29,393 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:29,404 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:29,446 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:29,446 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:29,446 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:29,446 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:29,446 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:29,447 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:29,447 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:29,447 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 00:08:29,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:29,497 INFO L380 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] [2019-10-15 00:08:29,501 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1232696998, now seen corresponding path program 1 times [2019-10-15 00:08:29,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:29,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499406243] [2019-10-15 00:08:29,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:29,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499406243] [2019-10-15 00:08:29,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:29,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:29,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325001414] [2019-10-15 00:08:29,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:29,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:30,000 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-15 00:08:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:33,609 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-10-15 00:08:33,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:33,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-10-15 00:08:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:33,643 INFO L225 Difference]: With dead ends: 1509 [2019-10-15 00:08:33,643 INFO L226 Difference]: Without dead ends: 1019 [2019-10-15 00:08:33,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-15 00:08:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-10-15 00:08:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:08:33,779 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 49 [2019-10-15 00:08:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:33,781 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:08:33,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:08:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 00:08:33,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:33,795 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:33,795 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -768303897, now seen corresponding path program 1 times [2019-10-15 00:08:33,797 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:33,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611546804] [2019-10-15 00:08:33,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:33,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:33,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:34,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611546804] [2019-10-15 00:08:34,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:34,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:08:34,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79914688] [2019-10-15 00:08:34,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:34,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:08:34,032 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-10-15 00:08:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:37,601 INFO L93 Difference]: Finished difference Result 2068 states and 3645 transitions. [2019-10-15 00:08:37,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:37,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-15 00:08:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:37,615 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 00:08:37,615 INFO L226 Difference]: Without dead ends: 1392 [2019-10-15 00:08:37,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-10-15 00:08:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-10-15 00:08:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-10-15 00:08:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-10-15 00:08:37,701 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 118 [2019-10-15 00:08:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:37,703 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-10-15 00:08:37,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-10-15 00:08:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 00:08:37,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:37,710 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:37,710 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:37,711 INFO L82 PathProgramCache]: Analyzing trace with hash -825960706, now seen corresponding path program 1 times [2019-10-15 00:08:37,711 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:37,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907252407] [2019-10-15 00:08:37,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:37,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:37,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:37,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907252407] [2019-10-15 00:08:37,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:37,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:37,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596344073] [2019-10-15 00:08:37,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:37,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:37,921 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-10-15 00:08:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:40,878 INFO L93 Difference]: Finished difference Result 3463 states and 5746 transitions. [2019-10-15 00:08:40,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:40,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-15 00:08:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:40,906 INFO L225 Difference]: With dead ends: 3463 [2019-10-15 00:08:40,906 INFO L226 Difference]: Without dead ends: 2095 [2019-10-15 00:08:40,912 INFO L600 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 [2019-10-15 00:08:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-10-15 00:08:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-10-15 00:08:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-10-15 00:08:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-10-15 00:08:41,014 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 121 [2019-10-15 00:08:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:41,017 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-10-15 00:08:41,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-10-15 00:08:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 00:08:41,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:41,026 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:41,027 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash -66026577, now seen corresponding path program 1 times [2019-10-15 00:08:41,027 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:41,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310763274] [2019-10-15 00:08:41,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:41,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:41,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:41,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310763274] [2019-10-15 00:08:41,268 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:41,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:41,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22602212] [2019-10-15 00:08:41,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:41,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:41,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:41,270 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-10-15 00:08:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:43,511 INFO L93 Difference]: Finished difference Result 4874 states and 7768 transitions. [2019-10-15 00:08:43,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:43,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-15 00:08:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:43,534 INFO L225 Difference]: With dead ends: 4874 [2019-10-15 00:08:43,534 INFO L226 Difference]: Without dead ends: 2803 [2019-10-15 00:08:43,539 INFO L600 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 [2019-10-15 00:08:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2019-10-15 00:08:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2790. [2019-10-15 00:08:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-10-15 00:08:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4061 transitions. [2019-10-15 00:08:43,618 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4061 transitions. Word has length 122 [2019-10-15 00:08:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:43,619 INFO L462 AbstractCegarLoop]: Abstraction has 2790 states and 4061 transitions. [2019-10-15 00:08:43,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4061 transitions. [2019-10-15 00:08:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:08:43,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:43,621 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:43,622 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash -388481722, now seen corresponding path program 1 times [2019-10-15 00:08:43,622 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:43,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394649641] [2019-10-15 00:08:43,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:43,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:43,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:43,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394649641] [2019-10-15 00:08:43,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:43,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:43,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806366683] [2019-10-15 00:08:43,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:43,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:43,731 INFO L87 Difference]: Start difference. First operand 2790 states and 4061 transitions. Second operand 6 states. [2019-10-15 00:08:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:46,569 INFO L93 Difference]: Finished difference Result 7362 states and 11039 transitions. [2019-10-15 00:08:46,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:08:46,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-15 00:08:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:46,598 INFO L225 Difference]: With dead ends: 7362 [2019-10-15 00:08:46,599 INFO L226 Difference]: Without dead ends: 4578 [2019-10-15 00:08:46,607 INFO L600 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 [2019-10-15 00:08:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2019-10-15 00:08:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 4526. [2019-10-15 00:08:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2019-10-15 00:08:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 6572 transitions. [2019-10-15 00:08:46,760 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 6572 transitions. Word has length 125 [2019-10-15 00:08:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:46,761 INFO L462 AbstractCegarLoop]: Abstraction has 4526 states and 6572 transitions. [2019-10-15 00:08:46,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 6572 transitions. [2019-10-15 00:08:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:08:46,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:46,764 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:46,764 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1273719254, now seen corresponding path program 1 times [2019-10-15 00:08:46,765 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:46,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139345128] [2019-10-15 00:08:46,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:46,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:46,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:46,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139345128] [2019-10-15 00:08:46,887 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:46,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:46,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209981484] [2019-10-15 00:08:46,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:46,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:46,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:46,890 INFO L87 Difference]: Start difference. First operand 4526 states and 6572 transitions. Second operand 6 states. [2019-10-15 00:08:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:49,473 INFO L93 Difference]: Finished difference Result 12150 states and 17943 transitions. [2019-10-15 00:08:49,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:49,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-15 00:08:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:49,519 INFO L225 Difference]: With dead ends: 12150 [2019-10-15 00:08:49,519 INFO L226 Difference]: Without dead ends: 7630 [2019-10-15 00:08:49,535 INFO L600 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 [2019-10-15 00:08:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2019-10-15 00:08:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6239. [2019-10-15 00:08:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6239 states. [2019-10-15 00:08:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8457 transitions. [2019-10-15 00:08:49,777 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8457 transitions. Word has length 133 [2019-10-15 00:08:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:49,778 INFO L462 AbstractCegarLoop]: Abstraction has 6239 states and 8457 transitions. [2019-10-15 00:08:49,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8457 transitions. [2019-10-15 00:08:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 00:08:49,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:49,781 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:49,781 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash -358644173, now seen corresponding path program 1 times [2019-10-15 00:08:49,782 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:49,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451879606] [2019-10-15 00:08:49,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:49,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:49,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:49,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451879606] [2019-10-15 00:08:49,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:49,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:49,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060352821] [2019-10-15 00:08:49,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:49,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:49,861 INFO L87 Difference]: Start difference. First operand 6239 states and 8457 transitions. Second operand 4 states. [2019-10-15 00:08:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:52,515 INFO L93 Difference]: Finished difference Result 14509 states and 19327 transitions. [2019-10-15 00:08:52,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:52,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 00:08:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:52,555 INFO L225 Difference]: With dead ends: 14509 [2019-10-15 00:08:52,556 INFO L226 Difference]: Without dead ends: 7216 [2019-10-15 00:08:52,572 INFO L600 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 [2019-10-15 00:08:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2019-10-15 00:08:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 6540. [2019-10-15 00:08:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6540 states. [2019-10-15 00:08:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 7231 transitions. [2019-10-15 00:08:52,747 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 7231 transitions. Word has length 140 [2019-10-15 00:08:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:52,747 INFO L462 AbstractCegarLoop]: Abstraction has 6540 states and 7231 transitions. [2019-10-15 00:08:52,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 7231 transitions. [2019-10-15 00:08:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2019-10-15 00:08:52,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:52,769 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:52,770 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash 88546971, now seen corresponding path program 1 times [2019-10-15 00:08:52,771 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:52,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346819037] [2019-10-15 00:08:52,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:52,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:52,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 243 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:53,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346819037] [2019-10-15 00:08:53,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047613293] [2019-10-15 00:08:53,473 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 [2019-10-15 00:08:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:53,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:53,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-15 00:08:54,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 243 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:54,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1228857765] [2019-10-15 00:08:54,646 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 595 [2019-10-15 00:08:54,710 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:54,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)