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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:07,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:07,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:07,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:01:07,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:07,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:07,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:07,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:07,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:07,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:07,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:07,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:07,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:07,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:07,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:07,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:07,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:07,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:07,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:07,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:07,332 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 [2019-10-14 22:01:07,348 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:07,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:07,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:07,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:07,352 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:07,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:07,353 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:07,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:07,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:07,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:07,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:07,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:07,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:07,355 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:07,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:07,355 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:07,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:07,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:07,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:07,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:07,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:07,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:07,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:07,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:07,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:07,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:07,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:07,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:07,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:07,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:07,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:07,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:07,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:07,659 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:07,660 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-14 22:01:07,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69946ce44/ac2ebceda0e4447caab4cfd125e0f93d/FLAGcaf70a50a [2019-10-14 22:01:08,278 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:08,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-14 22:01:08,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69946ce44/ac2ebceda0e4447caab4cfd125e0f93d/FLAGcaf70a50a [2019-10-14 22:01:08,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69946ce44/ac2ebceda0e4447caab4cfd125e0f93d [2019-10-14 22:01:08,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:08,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:08,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:08,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:08,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:08,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:08" (1/1) ... [2019-10-14 22:01:08,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14dc86bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:08, skipping insertion in model container [2019-10-14 22:01:08,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:08" (1/1) ... [2019-10-14 22:01:08,566 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:08,627 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:09,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:09,124 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:09,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:09,331 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:09,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09 WrapperNode [2019-10-14 22:01:09,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:09,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:09,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:09,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:09,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (1/1) ... [2019-10-14 22:01:09,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:09,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:09,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:09,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:09,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (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 [2019-10-14 22:01:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:11,097 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:11,097 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:11,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:11 BoogieIcfgContainer [2019-10-14 22:01:11,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:11,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:11,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:11,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:11,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:08" (1/3) ... [2019-10-14 22:01:11,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be0ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:11, skipping insertion in model container [2019-10-14 22:01:11,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:09" (2/3) ... [2019-10-14 22:01:11,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be0ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:11, skipping insertion in model container [2019-10-14 22:01:11,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:11" (3/3) ... [2019-10-14 22:01:11,107 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label08.c [2019-10-14 22:01:11,116 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:11,125 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:11,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:11,165 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:11,165 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:11,165 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:11,165 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:11,166 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:11,166 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:11,166 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:11,166 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 22:01:11,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:11,196 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:11,198 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -597113733, now seen corresponding path program 1 times [2019-10-14 22:01:11,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:11,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415105959] [2019-10-14 22:01:11,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:11,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:11,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:11,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415105959] [2019-10-14 22:01:11,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:11,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:11,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734195451] [2019-10-14 22:01:11,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:11,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:11,579 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:13,751 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:01:13,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:13,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 22:01:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:13,776 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:01:13,776 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:13,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:01:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:01:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:01:13,886 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 18 [2019-10-14 22:01:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:13,887 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:01:13,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:01:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 22:01:13,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:13,896 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:01:13,897 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash -866058331, now seen corresponding path program 1 times [2019-10-14 22:01:13,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:13,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142220387] [2019-10-14 22:01:13,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:13,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:13,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:14,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142220387] [2019-10-14 22:01:14,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:14,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:14,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596734215] [2019-10-14 22:01:14,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:14,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:14,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:14,269 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:01:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:16,828 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-14 22:01:16,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:16,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2019-10-14 22:01:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:16,844 INFO L225 Difference]: With dead ends: 2246 [2019-10-14 22:01:16,844 INFO L226 Difference]: Without dead ends: 1694 [2019-10-14 22:01:16,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-14 22:01:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 938. [2019-10-14 22:01:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-10-14 22:01:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1456 transitions. [2019-10-14 22:01:16,911 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1456 transitions. Word has length 87 [2019-10-14 22:01:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:16,912 INFO L462 AbstractCegarLoop]: Abstraction has 938 states and 1456 transitions. [2019-10-14 22:01:16,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1456 transitions. [2019-10-14 22:01:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 22:01:16,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:16,916 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:01:16,917 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 903171785, now seen corresponding path program 1 times [2019-10-14 22:01:16,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:16,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182902431] [2019-10-14 22:01:16,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:16,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:16,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:17,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182902431] [2019-10-14 22:01:17,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:17,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:01:17,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618005328] [2019-10-14 22:01:17,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:01:17,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:17,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:01:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:17,273 INFO L87 Difference]: Start difference. First operand 938 states and 1456 transitions. Second operand 8 states. [2019-10-14 22:01:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:20,450 INFO L93 Difference]: Finished difference Result 3278 states and 5571 transitions. [2019-10-14 22:01:20,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:20,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2019-10-14 22:01:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:20,469 INFO L225 Difference]: With dead ends: 3278 [2019-10-14 22:01:20,469 INFO L226 Difference]: Without dead ends: 2346 [2019-10-14 22:01:20,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-14 22:01:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1926. [2019-10-14 22:01:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2019-10-14 22:01:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2910 transitions. [2019-10-14 22:01:20,555 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2910 transitions. Word has length 117 [2019-10-14 22:01:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:20,556 INFO L462 AbstractCegarLoop]: Abstraction has 1926 states and 2910 transitions. [2019-10-14 22:01:20,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:01:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2910 transitions. [2019-10-14 22:01:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-14 22:01:20,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:20,565 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:20,566 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash -399824422, now seen corresponding path program 1 times [2019-10-14 22:01:20,566 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:20,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608881829] [2019-10-14 22:01:20,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:20,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:20,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 22:01:20,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608881829] [2019-10-14 22:01:20,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694351936] [2019-10-14 22:01:20,861 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 [2019-10-14 22:01:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:20,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 22:01:21,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:21,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:21,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515098968] [2019-10-14 22:01:21,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:21,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:21,113 INFO L87 Difference]: Start difference. First operand 1926 states and 2910 transitions. Second operand 3 states. [2019-10-14 22:01:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:21,961 INFO L93 Difference]: Finished difference Result 4406 states and 6778 transitions. [2019-10-14 22:01:21,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:21,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2019-10-14 22:01:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:21,977 INFO L225 Difference]: With dead ends: 4406 [2019-10-14 22:01:21,977 INFO L226 Difference]: Without dead ends: 2486 [2019-10-14 22:01:21,983 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-10-14 22:01:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2304. [2019-10-14 22:01:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2019-10-14 22:01:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3596 transitions. [2019-10-14 22:01:22,124 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3596 transitions. Word has length 229 [2019-10-14 22:01:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:22,125 INFO L462 AbstractCegarLoop]: Abstraction has 2304 states and 3596 transitions. [2019-10-14 22:01:22,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3596 transitions. [2019-10-14 22:01:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 22:01:22,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:22,132 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:22,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:22,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 899186239, now seen corresponding path program 1 times [2019-10-14 22:01:22,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:22,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940290883] [2019-10-14 22:01:22,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:22,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:22,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:22,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940290883] [2019-10-14 22:01:22,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540312020] [2019-10-14 22:01:22,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:22,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:22,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:22,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:22,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:01:22,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802056150] [2019-10-14 22:01:22,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:22,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:22,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:22,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:22,870 INFO L87 Difference]: Start difference. First operand 2304 states and 3596 transitions. Second operand 11 states. [2019-10-14 22:01:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:27,687 INFO L93 Difference]: Finished difference Result 7878 states and 14601 transitions. [2019-10-14 22:01:27,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:01:27,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-10-14 22:01:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:27,722 INFO L225 Difference]: With dead ends: 7878 [2019-10-14 22:01:27,722 INFO L226 Difference]: Without dead ends: 4612 [2019-10-14 22:01:27,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:01:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2019-10-14 22:01:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4522. [2019-10-14 22:01:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-10-14 22:01:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 6746 transitions. [2019-10-14 22:01:27,976 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 6746 transitions. Word has length 230 [2019-10-14 22:01:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:27,977 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 6746 transitions. [2019-10-14 22:01:27,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 6746 transitions. [2019-10-14 22:01:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 22:01:27,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:27,985 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:28,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:28,193 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1658054871, now seen corresponding path program 1 times [2019-10-14 22:01:28,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:28,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461070674] [2019-10-14 22:01:28,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:28,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:28,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 22:01:28,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461070674] [2019-10-14 22:01:28,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122751102] [2019-10-14 22:01:28,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:28,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 22:01:28,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:28,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 22:01:28,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667594009] [2019-10-14 22:01:28,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:28,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:28,627 INFO L87 Difference]: Start difference. First operand 4522 states and 6746 transitions. Second operand 3 states. [2019-10-14 22:01:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:29,511 INFO L93 Difference]: Finished difference Result 10526 states and 15929 transitions. [2019-10-14 22:01:29,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:29,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-14 22:01:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:29,546 INFO L225 Difference]: With dead ends: 10526 [2019-10-14 22:01:29,546 INFO L226 Difference]: Without dead ends: 6018 [2019-10-14 22:01:29,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2019-10-14 22:01:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5272. [2019-10-14 22:01:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5272 states. [2019-10-14 22:01:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 7845 transitions. [2019-10-14 22:01:29,771 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 7845 transitions. Word has length 234 [2019-10-14 22:01:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:29,771 INFO L462 AbstractCegarLoop]: Abstraction has 5272 states and 7845 transitions. [2019-10-14 22:01:29,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 7845 transitions. [2019-10-14 22:01:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-10-14 22:01:29,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:29,779 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:29,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:29,991 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1571879831, now seen corresponding path program 1 times [2019-10-14 22:01:29,991 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:29,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191936392] [2019-10-14 22:01:29,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:29,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:29,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:30,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191936392] [2019-10-14 22:01:30,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633501272] [2019-10-14 22:01:30,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:30,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:30,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:30,475 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:30,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:01:30,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504671257] [2019-10-14 22:01:30,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:30,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:30,478 INFO L87 Difference]: Start difference. First operand 5272 states and 7845 transitions. Second operand 11 states. [2019-10-14 22:01:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:34,096 INFO L93 Difference]: Finished difference Result 11986 states and 17838 transitions. [2019-10-14 22:01:34,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:01:34,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 242 [2019-10-14 22:01:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:34,149 INFO L225 Difference]: With dead ends: 11986 [2019-10-14 22:01:34,153 INFO L226 Difference]: Without dead ends: 5960 [2019-10-14 22:01:34,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:01:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2019-10-14 22:01:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 4216. [2019-10-14 22:01:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4216 states. [2019-10-14 22:01:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 5708 transitions. [2019-10-14 22:01:34,425 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 5708 transitions. Word has length 242 [2019-10-14 22:01:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:34,425 INFO L462 AbstractCegarLoop]: Abstraction has 4216 states and 5708 transitions. [2019-10-14 22:01:34,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 5708 transitions. [2019-10-14 22:01:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-14 22:01:34,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:34,441 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:34,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:34,648 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -121492162, now seen corresponding path program 1 times [2019-10-14 22:01:34,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:34,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981607085] [2019-10-14 22:01:34,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:34,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:34,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:35,245 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-10-14 22:01:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:36,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981607085] [2019-10-14 22:01:36,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812469240] [2019-10-14 22:01:36,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:36,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:36,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 22:01:36,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:36,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 22:01:36,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032026824] [2019-10-14 22:01:36,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:36,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:36,476 INFO L87 Difference]: Start difference. First operand 4216 states and 5708 transitions. Second operand 5 states. [2019-10-14 22:01:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:37,729 INFO L93 Difference]: Finished difference Result 7492 states and 10255 transitions. [2019-10-14 22:01:37,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:37,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-14 22:01:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:37,743 INFO L225 Difference]: With dead ends: 7492 [2019-10-14 22:01:37,743 INFO L226 Difference]: Without dead ends: 4220 [2019-10-14 22:01:37,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:01:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2019-10-14 22:01:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 4012. [2019-10-14 22:01:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4012 states. [2019-10-14 22:01:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 5368 transitions. [2019-10-14 22:01:37,860 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 5368 transitions. Word has length 259 [2019-10-14 22:01:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:37,861 INFO L462 AbstractCegarLoop]: Abstraction has 4012 states and 5368 transitions. [2019-10-14 22:01:37,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 5368 transitions. [2019-10-14 22:01:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-14 22:01:37,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:37,868 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:38,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:38,079 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:38,080 INFO L82 PathProgramCache]: Analyzing trace with hash 813242422, now seen corresponding path program 1 times [2019-10-14 22:01:38,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:38,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938446258] [2019-10-14 22:01:38,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 22 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:01:38,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938446258] [2019-10-14 22:01:38,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67624389] [2019-10-14 22:01:38,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:01:38,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 22:01:38,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:38,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:01:38,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076228230] [2019-10-14 22:01:38,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:38,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:38,845 INFO L87 Difference]: Start difference. First operand 4012 states and 5368 transitions. Second operand 5 states. [2019-10-14 22:01:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:39,909 INFO L93 Difference]: Finished difference Result 6644 states and 8936 transitions. [2019-10-14 22:01:39,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:01:39,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-10-14 22:01:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:39,918 INFO L225 Difference]: With dead ends: 6644 [2019-10-14 22:01:39,918 INFO L226 Difference]: Without dead ends: 3030 [2019-10-14 22:01:39,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2019-10-14 22:01:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2994. [2019-10-14 22:01:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2019-10-14 22:01:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3723 transitions. [2019-10-14 22:01:39,993 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3723 transitions. Word has length 287 [2019-10-14 22:01:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:39,993 INFO L462 AbstractCegarLoop]: Abstraction has 2994 states and 3723 transitions. [2019-10-14 22:01:39,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3723 transitions. [2019-10-14 22:01:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-14 22:01:40,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:40,000 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:01:40,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:40,212 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1137249175, now seen corresponding path program 1 times [2019-10-14 22:01:40,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:40,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334864006] [2019-10-14 22:01:40,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 43 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:41,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334864006] [2019-10-14 22:01:41,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984635850] [2019-10-14 22:01:41,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:41,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:41,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 248 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 22:01:41,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:41,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:41,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946680147] [2019-10-14 22:01:41,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:41,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:41,944 INFO L87 Difference]: Start difference. First operand 2994 states and 3723 transitions. Second operand 16 states.