/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/Problem15_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:17,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:17,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:17,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:17,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:17,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:17,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:17,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:17,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:17,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:17,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:17,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:17,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:17,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:17,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:17,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:17,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:17,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:17,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:17,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:17,226 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 22:53:17,240 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:17,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:17,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:17,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:17,242 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:17,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:17,242 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:17,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:17,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:17,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:17,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:17,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:17,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:17,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:17,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:17,244 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:17,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:17,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:17,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:17,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:17,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:17,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:17,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:17,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:17,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:17,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:17,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:17,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:17,247 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 22:53:17,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:17,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:17,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:17,554 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:17,554 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:17,555 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-06 22:53:17,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cebd64e/e71c9ad804ef4051ae3d349c1e788560/FLAG1656f713c [2019-11-06 22:53:18,316 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:18,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-06 22:53:18,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cebd64e/e71c9ad804ef4051ae3d349c1e788560/FLAG1656f713c [2019-11-06 22:53:18,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cebd64e/e71c9ad804ef4051ae3d349c1e788560 [2019-11-06 22:53:18,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:18,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:18,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:18,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:18,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:18,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:18" (1/1) ... [2019-11-06 22:53:18,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff15ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:18, skipping insertion in model container [2019-11-06 22:53:18,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:18" (1/1) ... [2019-11-06 22:53:18,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:18,595 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:19,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:19,429 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:19,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:19,853 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:19,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19 WrapperNode [2019-11-06 22:53:19,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:19,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:19,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:19,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:19,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:19,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:19,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:19,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:19,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:20,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:20,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (1/1) ... [2019-11-06 22:53:20,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:20,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:20,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:20,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:20,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (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 22:53:20,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:20,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:20,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:24,167 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:24,168 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:24,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:24 BoogieIcfgContainer [2019-11-06 22:53:24,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:24,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:24,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:24,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:24,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:18" (1/3) ... [2019-11-06 22:53:24,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565601be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:24, skipping insertion in model container [2019-11-06 22:53:24,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:19" (2/3) ... [2019-11-06 22:53:24,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565601be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:24, skipping insertion in model container [2019-11-06 22:53:24,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:24" (3/3) ... [2019-11-06 22:53:24,178 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2019-11-06 22:53:24,188 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:24,198 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:24,210 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:24,258 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:24,259 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:24,259 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:24,259 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:24,259 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:24,259 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:24,260 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:24,260 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:53:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:53:24,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:24,317 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] [2019-11-06 22:53:24,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1661413296, now seen corresponding path program 1 times [2019-11-06 22:53:24,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:24,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204285937] [2019-11-06 22:53:24,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:24,845 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 22:53:24,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204285937] [2019-11-06 22:53:24,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:24,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:24,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922810812] [2019-11-06 22:53:24,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:24,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:24,882 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:53:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:29,195 INFO L93 Difference]: Finished difference Result 1546 states and 2831 transitions. [2019-11-06 22:53:29,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:29,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2019-11-06 22:53:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:29,253 INFO L225 Difference]: With dead ends: 1546 [2019-11-06 22:53:29,254 INFO L226 Difference]: Without dead ends: 1028 [2019-11-06 22:53:29,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-11-06 22:53:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-11-06 22:53:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-06 22:53:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-11-06 22:53:29,387 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 58 [2019-11-06 22:53:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:29,388 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-11-06 22:53:29,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-11-06 22:53:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:53:29,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:29,403 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, 1, 1, 1, 1, 1, 1, 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 22:53:29,403 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1221807989, now seen corresponding path program 1 times [2019-11-06 22:53:29,404 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:29,404 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321925644] [2019-11-06 22:53:29,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:29,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321925644] [2019-11-06 22:53:29,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:29,661 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:29,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142714502] [2019-11-06 22:53:29,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:29,668 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:29,669 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-11-06 22:53:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:34,796 INFO L93 Difference]: Finished difference Result 2057 states and 3297 transitions. [2019-11-06 22:53:34,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:34,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-06 22:53:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:34,808 INFO L225 Difference]: With dead ends: 2057 [2019-11-06 22:53:34,808 INFO L226 Difference]: Without dead ends: 1363 [2019-11-06 22:53:34,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:53:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-11-06 22:53:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-11-06 22:53:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-11-06 22:53:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-11-06 22:53:34,886 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 130 [2019-11-06 22:53:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:34,889 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-11-06 22:53:34,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-11-06 22:53:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:53:34,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:34,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:34,898 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -78025861, now seen corresponding path program 1 times [2019-11-06 22:53:34,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:34,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369627729] [2019-11-06 22:53:34,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:35,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369627729] [2019-11-06 22:53:35,112 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:35,113 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:35,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080121546] [2019-11-06 22:53:35,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:35,114 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:35,114 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 4 states. [2019-11-06 22:53:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:39,708 INFO L93 Difference]: Finished difference Result 5149 states and 7300 transitions. [2019-11-06 22:53:39,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:39,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-06 22:53:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:39,734 INFO L225 Difference]: With dead ends: 5149 [2019-11-06 22:53:39,734 INFO L226 Difference]: Without dead ends: 3822 [2019-11-06 22:53:39,739 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 22:53:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2019-11-06 22:53:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3819. [2019-11-06 22:53:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3819 states. [2019-11-06 22:53:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 4957 transitions. [2019-11-06 22:53:39,922 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 4957 transitions. Word has length 138 [2019-11-06 22:53:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:39,924 INFO L462 AbstractCegarLoop]: Abstraction has 3819 states and 4957 transitions. [2019-11-06 22:53:39,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 4957 transitions. [2019-11-06 22:53:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:53:39,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:39,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:39,927 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash 90955185, now seen corresponding path program 1 times [2019-11-06 22:53:39,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:39,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257708078] [2019-11-06 22:53:39,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:40,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257708078] [2019-11-06 22:53:40,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:40,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:53:40,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597338097] [2019-11-06 22:53:40,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:53:40,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:53:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:53:40,170 INFO L87 Difference]: Start difference. First operand 3819 states and 4957 transitions. Second operand 6 states. [2019-11-06 22:53:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:43,303 INFO L93 Difference]: Finished difference Result 7712 states and 10087 transitions. [2019-11-06 22:53:43,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:53:43,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-06 22:53:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:43,328 INFO L225 Difference]: With dead ends: 7712 [2019-11-06 22:53:43,328 INFO L226 Difference]: Without dead ends: 3899 [2019-11-06 22:53:43,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:53:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2019-11-06 22:53:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3889. [2019-11-06 22:53:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3889 states. [2019-11-06 22:53:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 4912 transitions. [2019-11-06 22:53:43,434 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 4912 transitions. Word has length 144 [2019-11-06 22:53:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:43,435 INFO L462 AbstractCegarLoop]: Abstraction has 3889 states and 4912 transitions. [2019-11-06 22:53:43,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:53:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 4912 transitions. [2019-11-06 22:53:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 22:53:43,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:43,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:43,438 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2025648949, now seen corresponding path program 1 times [2019-11-06 22:53:43,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:43,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972594421] [2019-11-06 22:53:43,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:43,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972594421] [2019-11-06 22:53:43,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288638122] [2019-11-06 22:53:43,718 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 22:53:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:43,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:53:43,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:43,993 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:44,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:44,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:53:44,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 13 [2019-11-06 22:53:44,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168776667] [2019-11-06 22:53:44,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:53:44,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:53:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:53:44,336 INFO L87 Difference]: Start difference. First operand 3889 states and 4912 transitions. Second operand 7 states. [2019-11-06 22:53:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:50,119 INFO L93 Difference]: Finished difference Result 10066 states and 12742 transitions. [2019-11-06 22:53:50,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:53:50,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2019-11-06 22:53:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:50,149 INFO L225 Difference]: With dead ends: 10066 [2019-11-06 22:53:50,150 INFO L226 Difference]: Without dead ends: 6183 [2019-11-06 22:53:50,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:53:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2019-11-06 22:53:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 5232. [2019-11-06 22:53:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5232 states. [2019-11-06 22:53:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 6648 transitions. [2019-11-06 22:53:50,345 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 6648 transitions. Word has length 169 [2019-11-06 22:53:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:50,346 INFO L462 AbstractCegarLoop]: Abstraction has 5232 states and 6648 transitions. [2019-11-06 22:53:50,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:53:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 6648 transitions. [2019-11-06 22:53:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 22:53:50,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:50,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:50,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:50,556 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash -507621590, now seen corresponding path program 1 times [2019-11-06 22:53:50,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:50,558 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877143375] [2019-11-06 22:53:50,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:50,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877143375] [2019-11-06 22:53:50,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:50,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:50,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556523646] [2019-11-06 22:53:50,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:50,806 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:50,807 INFO L87 Difference]: Start difference. First operand 5232 states and 6648 transitions. Second operand 5 states.