/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:25:08,499 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 00:25:08,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:25:08,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:25:08,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:25:08,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:25:08,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:25:08,629 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:25:08,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:25:08,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:25:08,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:25:08,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:25:08,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:25:08,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:25:08,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:25:08,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:25:08,631 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:25:08,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:25:08,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:25:08,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:25:08,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:25:08,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:25:08,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:25:08,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:25:08,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:25:08,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:25:08,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:25:08,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:25:08,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:25:08,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:25:08,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:25:08,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:25:08,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:25:08,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-19 00:25:09,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ab0587f2/9f8e2bc117504b48b1e331a5f87fb9b7/FLAGa6e24e142 [2020-08-19 00:25:09,593 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:25:09,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-19 00:25:09,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ab0587f2/9f8e2bc117504b48b1e331a5f87fb9b7/FLAGa6e24e142 [2020-08-19 00:25:09,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ab0587f2/9f8e2bc117504b48b1e331a5f87fb9b7 [2020-08-19 00:25:09,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:25:09,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:25:09,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:25:09,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:25:09,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:25:09,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:25:09" (1/1) ... [2020-08-19 00:25:09,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:09, skipping insertion in model container [2020-08-19 00:25:09,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:25:09" (1/1) ... [2020-08-19 00:25:09,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:25:09,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:25:10,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:25:10,393 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:25:10,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:25:10,690 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:25:10,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10 WrapperNode [2020-08-19 00:25:10,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:25:10,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:25:10,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:25:10,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:25:10,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... [2020-08-19 00:25:10,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:25:10,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:25:10,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:25:10,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:25:10,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 00:25:10,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:25:10,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:25:10,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-19 00:25:10,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:25:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-19 00:25:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:25:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:25:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 00:25:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:25:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:25:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:25:12,470 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:25:12,470 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 00:25:12,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:25:12 BoogieIcfgContainer [2020-08-19 00:25:12,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:25:12,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:25:12,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:25:12,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:25:12,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:25:09" (1/3) ... [2020-08-19 00:25:12,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baadc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:25:12, skipping insertion in model container [2020-08-19 00:25:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:25:10" (2/3) ... [2020-08-19 00:25:12,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baadc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:25:12, skipping insertion in model container [2020-08-19 00:25:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:25:12" (3/3) ... [2020-08-19 00:25:12,486 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-19 00:25:12,497 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:25:12,505 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:25:12,519 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:25:12,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:25:12,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:25:12,547 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:25:12,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:25:12,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:25:12,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:25:12,547 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:25:12,547 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:25:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-19 00:25:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 00:25:12,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:12,581 INFO L422 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] [2020-08-19 00:25:12,581 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-19 00:25:12,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:12,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557963867] [2020-08-19 00:25:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:25:12,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557963867] [2020-08-19 00:25:12,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:25:12,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 00:25:12,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592739186] [2020-08-19 00:25:12,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:25:12,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:25:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:25:13,014 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-19 00:25:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:15,875 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-19 00:25:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:25:15,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-19 00:25:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:15,916 INFO L225 Difference]: With dead ends: 886 [2020-08-19 00:25:15,916 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 00:25:15,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:25:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 00:25:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-19 00:25:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-19 00:25:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-19 00:25:16,053 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-19 00:25:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:16,054 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-19 00:25:16,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:25:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-19 00:25:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 00:25:16,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:16,061 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:16,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:25:16,062 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:16,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-19 00:25:16,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:16,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235496344] [2020-08-19 00:25:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:16,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:25:16,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235496344] [2020-08-19 00:25:16,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:25:16,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 00:25:16,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405043914] [2020-08-19 00:25:16,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:25:16,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:25:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:25:16,432 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-19 00:25:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:18,465 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-19 00:25:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:25:18,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-19 00:25:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:18,473 INFO L225 Difference]: With dead ends: 1320 [2020-08-19 00:25:18,473 INFO L226 Difference]: Without dead ends: 768 [2020-08-19 00:25:18,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:25:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-19 00:25:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-19 00:25:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-19 00:25:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-19 00:25:18,522 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-19 00:25:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:18,523 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-19 00:25:18,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:25:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-19 00:25:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-19 00:25:18,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:18,529 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:18,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:25:18,530 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-19 00:25:18,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:18,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476072102] [2020-08-19 00:25:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:18,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:25:18,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476072102] [2020-08-19 00:25:18,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:25:18,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 00:25:18,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090819745] [2020-08-19 00:25:18,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:25:18,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:25:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:25:18,842 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-19 00:25:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:20,704 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-19 00:25:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 00:25:20,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-19 00:25:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:20,710 INFO L225 Difference]: With dead ends: 1330 [2020-08-19 00:25:20,710 INFO L226 Difference]: Without dead ends: 770 [2020-08-19 00:25:20,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:25:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-19 00:25:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-19 00:25:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-19 00:25:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-19 00:25:20,776 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-19 00:25:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:20,778 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-19 00:25:20,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:25:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-19 00:25:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-19 00:25:20,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:20,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-19 00:25:20,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:25:20,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-19 00:25:20,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:20,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307741834] [2020-08-19 00:25:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:20,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:20,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:20,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 00:25:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-19 00:25:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307741834] [2020-08-19 00:25:21,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:21,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 00:25:21,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33743419] [2020-08-19 00:25:21,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:25:21,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:21,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:25:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:25:21,090 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-19 00:25:22,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:22,858 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-19 00:25:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:25:22,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-19 00:25:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:22,869 INFO L225 Difference]: With dead ends: 2246 [2020-08-19 00:25:22,869 INFO L226 Difference]: Without dead ends: 1498 [2020-08-19 00:25:22,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:25:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-19 00:25:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-19 00:25:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-19 00:25:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-19 00:25:22,923 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-19 00:25:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:22,924 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-19 00:25:22,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:25:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-19 00:25:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-19 00:25:22,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:22,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:22,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:25:22,936 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-19 00:25:22,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:22,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213667893] [2020-08-19 00:25:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:23,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:23,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 00:25:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:23,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-19 00:25:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 00:25:23,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213667893] [2020-08-19 00:25:23,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:23,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:25:23,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815278504] [2020-08-19 00:25:23,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:25:23,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:25:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:25:23,712 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-19 00:25:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:26,332 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-19 00:25:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:25:26,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-19 00:25:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:26,344 INFO L225 Difference]: With dead ends: 3081 [2020-08-19 00:25:26,345 INFO L226 Difference]: Without dead ends: 1734 [2020-08-19 00:25:26,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:25:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-19 00:25:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-19 00:25:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-19 00:25:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-19 00:25:26,411 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-19 00:25:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:26,412 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-19 00:25:26,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:25:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-19 00:25:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-19 00:25:26,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:26,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:26,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:25:26,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-19 00:25:26,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:26,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205144527] [2020-08-19 00:25:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:26,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:26,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:26,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 00:25:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:26,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 00:25:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-19 00:25:27,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205144527] [2020-08-19 00:25:27,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:27,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:25:27,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711800759] [2020-08-19 00:25:27,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:25:27,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:25:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:25:27,272 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-19 00:25:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:29,411 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-19 00:25:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:25:29,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-19 00:25:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:29,423 INFO L225 Difference]: With dead ends: 3607 [2020-08-19 00:25:29,423 INFO L226 Difference]: Without dead ends: 1923 [2020-08-19 00:25:29,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:25:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-19 00:25:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-19 00:25:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-19 00:25:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-19 00:25:29,490 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-19 00:25:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:29,491 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-19 00:25:29,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:25:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-19 00:25:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-19 00:25:29,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:29,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:29,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:25:29,499 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-19 00:25:29,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:29,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042546558] [2020-08-19 00:25:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:29,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:29,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 00:25:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:29,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-19 00:25:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-19 00:25:30,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042546558] [2020-08-19 00:25:30,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:30,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:25:30,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432130819] [2020-08-19 00:25:30,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:25:30,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:25:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:25:30,032 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-19 00:25:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:33,600 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-19 00:25:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:25:33,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-19 00:25:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:33,627 INFO L225 Difference]: With dead ends: 5807 [2020-08-19 00:25:33,628 INFO L226 Difference]: Without dead ends: 3550 [2020-08-19 00:25:33,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:25:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-19 00:25:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-19 00:25:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-19 00:25:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-19 00:25:33,743 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-19 00:25:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:33,743 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-19 00:25:33,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:25:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-19 00:25:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-19 00:25:33,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:33,763 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:33,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:25:33,763 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-19 00:25:33,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:33,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511986339] [2020-08-19 00:25:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:33,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:33,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:33,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:34,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:34,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-19 00:25:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:34,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-19 00:25:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-19 00:25:34,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511986339] [2020-08-19 00:25:34,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:34,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:25:34,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64402957] [2020-08-19 00:25:34,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:25:34,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:25:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:25:34,615 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-19 00:25:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:36,256 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-19 00:25:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:25:36,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-19 00:25:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:36,276 INFO L225 Difference]: With dead ends: 6928 [2020-08-19 00:25:36,276 INFO L226 Difference]: Without dead ends: 3938 [2020-08-19 00:25:36,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:25:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-19 00:25:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-19 00:25:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-19 00:25:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-19 00:25:36,377 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-19 00:25:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:36,378 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-19 00:25:36,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:25:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-19 00:25:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-19 00:25:36,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:36,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-08-19 00:25:36,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:25:36,390 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-19 00:25:36,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:36,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399971025] [2020-08-19 00:25:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 00:25:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-19 00:25:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-19 00:25:37,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399971025] [2020-08-19 00:25:37,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:37,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:25:37,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213957161] [2020-08-19 00:25:37,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:25:37,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:25:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:25:37,189 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-19 00:25:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:38,837 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-19 00:25:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:25:38,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-19 00:25:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:38,861 INFO L225 Difference]: With dead ends: 8034 [2020-08-19 00:25:38,861 INFO L226 Difference]: Without dead ends: 4484 [2020-08-19 00:25:38,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:25:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-19 00:25:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-19 00:25:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-19 00:25:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-19 00:25:38,986 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-19 00:25:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:38,987 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-19 00:25:38,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:25:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-19 00:25:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-19 00:25:39,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:39,005 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-08-19 00:25:39,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:25:39,005 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-19 00:25:39,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:39,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412028607] [2020-08-19 00:25:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-19 00:25:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-19 00:25:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-19 00:25:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:39,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-19 00:25:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-19 00:25:40,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412028607] [2020-08-19 00:25:40,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:40,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:25:40,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775755015] [2020-08-19 00:25:40,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:25:40,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:25:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:25:40,376 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-19 00:25:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:42,335 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-19 00:25:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:25:42,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-19 00:25:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:42,354 INFO L225 Difference]: With dead ends: 8817 [2020-08-19 00:25:42,354 INFO L226 Difference]: Without dead ends: 4494 [2020-08-19 00:25:42,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:25:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-19 00:25:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-19 00:25:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-19 00:25:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-19 00:25:42,477 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-19 00:25:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:42,478 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-19 00:25:42,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:25:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-19 00:25:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-19 00:25:42,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:42,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:42,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:25:42,499 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-19 00:25:42,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:42,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976306233] [2020-08-19 00:25:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 00:25:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:42,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 00:25:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:43,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-19 00:25:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-19 00:25:43,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976306233] [2020-08-19 00:25:43,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:43,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:25:43,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36685445] [2020-08-19 00:25:43,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:25:43,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:25:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:25:43,403 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-19 00:25:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:44,955 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-19 00:25:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:25:44,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-19 00:25:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:44,981 INFO L225 Difference]: With dead ends: 9674 [2020-08-19 00:25:44,981 INFO L226 Difference]: Without dead ends: 5398 [2020-08-19 00:25:44,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:25:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-19 00:25:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-19 00:25:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-19 00:25:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-19 00:25:45,095 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-19 00:25:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:45,097 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-19 00:25:45,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:25:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-19 00:25:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-19 00:25:45,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:45,113 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2020-08-19 00:25:45,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:25:45,114 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-19 00:25:45,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:45,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268679675] [2020-08-19 00:25:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-19 00:25:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-19 00:25:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-19 00:25:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-19 00:25:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-19 00:25:46,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268679675] [2020-08-19 00:25:46,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:46,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:25:46,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206571477] [2020-08-19 00:25:46,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:25:46,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:25:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:25:46,800 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-19 00:25:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:49,616 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-19 00:25:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:25:49,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-19 00:25:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:49,638 INFO L225 Difference]: With dead ends: 11142 [2020-08-19 00:25:49,638 INFO L226 Difference]: Without dead ends: 6124 [2020-08-19 00:25:49,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:25:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-19 00:25:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-19 00:25:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-19 00:25:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-19 00:25:49,765 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-19 00:25:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:49,766 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-19 00:25:49,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:25:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-19 00:25:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-19 00:25:49,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:49,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-19 00:25:49,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:25:49,786 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:49,787 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-19 00:25:49,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:49,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123238561] [2020-08-19 00:25:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:49,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:49,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 00:25:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-19 00:25:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-19 00:25:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:50,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-19 00:25:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-19 00:25:51,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123238561] [2020-08-19 00:25:51,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:51,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:25:51,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272302172] [2020-08-19 00:25:51,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:25:51,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:25:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:25:51,385 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-19 00:25:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:55,008 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-19 00:25:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 00:25:55,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-19 00:25:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:55,026 INFO L225 Difference]: With dead ends: 11324 [2020-08-19 00:25:55,026 INFO L226 Difference]: Without dead ends: 5758 [2020-08-19 00:25:55,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:25:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-19 00:25:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-19 00:25:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-19 00:25:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-19 00:25:55,155 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-19 00:25:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:55,156 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-19 00:25:55,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:25:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-19 00:25:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-19 00:25:55,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:55,180 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:25:55,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:25:55,181 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:55,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-19 00:25:55,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:55,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442410620] [2020-08-19 00:25:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:25:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:25:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:25:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:25:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:25:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 00:25:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 00:25:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-19 00:25:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-19 00:25:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:25:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-19 00:25:56,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442410620] [2020-08-19 00:25:56,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:25:56,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:25:56,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457603803] [2020-08-19 00:25:56,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:25:56,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:25:56,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:25:56,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:25:56,227 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-19 00:25:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:25:59,618 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-19 00:25:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:25:59,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-19 00:25:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:25:59,646 INFO L225 Difference]: With dead ends: 13170 [2020-08-19 00:25:59,646 INFO L226 Difference]: Without dead ends: 7602 [2020-08-19 00:25:59,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:25:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-19 00:25:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-19 00:25:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-19 00:25:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-19 00:25:59,863 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-19 00:25:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:25:59,864 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-19 00:25:59,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:25:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-19 00:25:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-19 00:25:59,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:25:59,913 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-19 00:25:59,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:25:59,913 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:25:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:25:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-19 00:25:59,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:25:59,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774837063] [2020-08-19 00:25:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:26:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:26:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:26:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:26:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:26:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 00:26:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-19 00:26:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-19 00:26:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-19 00:26:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-19 00:26:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:00,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-19 00:26:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-19 00:26:01,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774837063] [2020-08-19 00:26:01,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:26:01,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:26:01,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707516641] [2020-08-19 00:26:01,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:26:01,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:26:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:26:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:26:01,807 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-19 00:26:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:26:04,813 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-19 00:26:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:26:04,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-19 00:26:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:26:04,842 INFO L225 Difference]: With dead ends: 17064 [2020-08-19 00:26:04,843 INFO L226 Difference]: Without dead ends: 9836 [2020-08-19 00:26:04,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:26:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-19 00:26:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-19 00:26:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-19 00:26:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-19 00:26:05,027 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-19 00:26:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:26:05,028 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-19 00:26:05,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:26:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-19 00:26:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-19 00:26:05,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:26:05,064 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-19 00:26:05,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:26:05,064 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:26:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:26:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-19 00:26:05,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:26:05,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594973824] [2020-08-19 00:26:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:26:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:05,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:26:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:05,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 00:26:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:05,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:26:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:26:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 00:26:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat