/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem16_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:11:14,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:11:14,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:11:14,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:11:14,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:11:14,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:11:14,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:11:14,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:11:14,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:11:14,640 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:11:14,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:11:14,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:11:14,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:11:14,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:11:14,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:11:14,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:11:14,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:11:14,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:11:14,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:11:14,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:11:14,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:11:14,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:11:14,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:11:14,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:11:14,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:11:14,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:11:14,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:11:14,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:11:14,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:11:14,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:11:14,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:11:15,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:11:15,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:11:15,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:11:15,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:11:15,072 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:11:15,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label04.c [2020-12-22 02:11:15,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6896806d4/0583b684f7964cf2995b0599ce9d377d/FLAG3837d2c61 [2020-12-22 02:11:16,064 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:11:16,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label04.c [2020-12-22 02:11:16,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6896806d4/0583b684f7964cf2995b0599ce9d377d/FLAG3837d2c61 [2020-12-22 02:11:16,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6896806d4/0583b684f7964cf2995b0599ce9d377d [2020-12-22 02:11:16,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:11:16,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:11:16,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:11:16,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:11:16,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:11:16,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:11:16" (1/1) ... [2020-12-22 02:11:16,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7f175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:16, skipping insertion in model container [2020-12-22 02:11:16,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:11:16" (1/1) ... [2020-12-22 02:11:16,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:11:16,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:11:16,958 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label04.c[3124,3137] [2020-12-22 02:11:17,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:11:17,478 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:11:17,514 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label04.c[3124,3137] [2020-12-22 02:11:17,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:11:17,770 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:11:17,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17 WrapperNode [2020-12-22 02:11:17,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:11:17,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:11:17,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:11:17,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:11:17,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:17,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:17,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:11:17,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:11:17,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:11:17,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:11:17,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:17,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:17,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:17,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:18,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:18,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:18,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... [2020-12-22 02:11:18,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:11:18,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:11:18,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:11:18,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:11:18,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:11:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:11:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:11:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:11:18,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:11:20,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:11:20,862 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:11:20,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:11:20 BoogieIcfgContainer [2020-12-22 02:11:20,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:11:20,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:11:20,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:11:20,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:11:20,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:11:16" (1/3) ... [2020-12-22 02:11:20,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6989dd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:11:20, skipping insertion in model container [2020-12-22 02:11:20,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:11:17" (2/3) ... [2020-12-22 02:11:20,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6989dd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:11:20, skipping insertion in model container [2020-12-22 02:11:20,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:11:20" (3/3) ... [2020-12-22 02:11:20,875 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label04.c [2020-12-22 02:11:20,883 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:11:20,888 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:11:20,909 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:11:20,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:11:20,941 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:11:20,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:11:20,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:11:20,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:11:20,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:11:20,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:11:20,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:11:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2020-12-22 02:11:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 02:11:20,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:20,990 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] [2020-12-22 02:11:20,990 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2020-12-22 02:11:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:21,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697345957] [2020-12-22 02:11:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:11:21,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697345957] [2020-12-22 02:11:21,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:21,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:11:21,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364617518] [2020-12-22 02:11:21,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:21,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:21,365 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 3 states. [2020-12-22 02:11:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:23,891 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2020-12-22 02:11:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:23,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-22 02:11:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:23,919 INFO L225 Difference]: With dead ends: 1122 [2020-12-22 02:11:23,919 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 02:11:23,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 02:11:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2020-12-22 02:11:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-12-22 02:11:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2020-12-22 02:11:24,028 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 28 [2020-12-22 02:11:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:24,029 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2020-12-22 02:11:24,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2020-12-22 02:11:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 02:11:24,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:24,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:24,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:11:24,034 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash 632314908, now seen corresponding path program 1 times [2020-12-22 02:11:24,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:24,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812266796] [2020-12-22 02:11:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:11:24,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812266796] [2020-12-22 02:11:24,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:24,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:11:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893126204] [2020-12-22 02:11:24,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:24,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:24,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:24,295 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand 3 states. [2020-12-22 02:11:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:26,833 INFO L93 Difference]: Finished difference Result 1982 states and 3008 transitions. [2020-12-22 02:11:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:26,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 02:11:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:26,844 INFO L225 Difference]: With dead ends: 1982 [2020-12-22 02:11:26,844 INFO L226 Difference]: Without dead ends: 1322 [2020-12-22 02:11:26,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-12-22 02:11:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-12-22 02:11:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-12-22 02:11:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1921 transitions. [2020-12-22 02:11:26,943 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1921 transitions. Word has length 96 [2020-12-22 02:11:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:26,944 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 1921 transitions. [2020-12-22 02:11:26,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1921 transitions. [2020-12-22 02:11:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 02:11:26,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:26,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:26,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:11:26,954 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash 931507973, now seen corresponding path program 1 times [2020-12-22 02:11:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:26,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917145653] [2020-12-22 02:11:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:11:27,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917145653] [2020-12-22 02:11:27,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:27,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783430731] [2020-12-22 02:11:27,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:11:27,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:11:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:11:27,169 INFO L87 Difference]: Start difference. First operand 1320 states and 1921 transitions. Second operand 4 states. [2020-12-22 02:11:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:30,657 INFO L93 Difference]: Finished difference Result 4283 states and 6147 transitions. [2020-12-22 02:11:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:11:30,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-22 02:11:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:30,679 INFO L225 Difference]: With dead ends: 4283 [2020-12-22 02:11:30,680 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 02:11:30,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:11:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 02:11:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2020-12-22 02:11:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-12-22 02:11:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4052 transitions. [2020-12-22 02:11:30,772 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4052 transitions. Word has length 107 [2020-12-22 02:11:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:30,780 INFO L481 AbstractCegarLoop]: Abstraction has 2965 states and 4052 transitions. [2020-12-22 02:11:30,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:11:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4052 transitions. [2020-12-22 02:11:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 02:11:30,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:30,788 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:11:30,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:11:30,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 158615286, now seen corresponding path program 1 times [2020-12-22 02:11:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:30,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658156982] [2020-12-22 02:11:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 02:11:31,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658156982] [2020-12-22 02:11:31,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:31,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:11:31,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243830593] [2020-12-22 02:11:31,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:31,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:31,083 INFO L87 Difference]: Start difference. First operand 2965 states and 4052 transitions. Second operand 3 states. [2020-12-22 02:11:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:33,270 INFO L93 Difference]: Finished difference Result 8231 states and 11469 transitions. [2020-12-22 02:11:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:33,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-12-22 02:11:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:33,302 INFO L225 Difference]: With dead ends: 8231 [2020-12-22 02:11:33,302 INFO L226 Difference]: Without dead ends: 5597 [2020-12-22 02:11:33,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2020-12-22 02:11:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 4939. [2020-12-22 02:11:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4939 states. [2020-12-22 02:11:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6484 transitions. [2020-12-22 02:11:33,434 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6484 transitions. Word has length 194 [2020-12-22 02:11:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:33,436 INFO L481 AbstractCegarLoop]: Abstraction has 4939 states and 6484 transitions. [2020-12-22 02:11:33,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6484 transitions. [2020-12-22 02:11:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-22 02:11:33,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:33,442 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:11:33,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:11:33,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1684873428, now seen corresponding path program 1 times [2020-12-22 02:11:33,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:33,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104416496] [2020-12-22 02:11:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 02:11:33,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104416496] [2020-12-22 02:11:33,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:33,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:11:33,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606068082] [2020-12-22 02:11:33,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:33,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:33,762 INFO L87 Difference]: Start difference. First operand 4939 states and 6484 transitions. Second operand 3 states. [2020-12-22 02:11:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:35,806 INFO L93 Difference]: Finished difference Result 10863 states and 14193 transitions. [2020-12-22 02:11:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:35,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 270 [2020-12-22 02:11:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:35,836 INFO L225 Difference]: With dead ends: 10863 [2020-12-22 02:11:35,836 INFO L226 Difference]: Without dead ends: 6255 [2020-12-22 02:11:35,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2020-12-22 02:11:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 6255. [2020-12-22 02:11:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6255 states. [2020-12-22 02:11:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6255 states to 6255 states and 7560 transitions. [2020-12-22 02:11:35,966 INFO L78 Accepts]: Start accepts. Automaton has 6255 states and 7560 transitions. Word has length 270 [2020-12-22 02:11:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:35,967 INFO L481 AbstractCegarLoop]: Abstraction has 6255 states and 7560 transitions. [2020-12-22 02:11:35,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6255 states and 7560 transitions. [2020-12-22 02:11:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-12-22 02:11:35,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:35,979 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:35,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:11:35,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 336693312, now seen corresponding path program 1 times [2020-12-22 02:11:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:35,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718999113] [2020-12-22 02:11:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 02:11:36,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718999113] [2020-12-22 02:11:36,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:36,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 02:11:36,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961681591] [2020-12-22 02:11:36,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:11:36,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:11:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:11:36,767 INFO L87 Difference]: Start difference. First operand 6255 states and 7560 transitions. Second operand 7 states. [2020-12-22 02:11:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:39,681 INFO L93 Difference]: Finished difference Result 12038 states and 14630 transitions. [2020-12-22 02:11:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:11:39,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 471 [2020-12-22 02:11:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:39,706 INFO L225 Difference]: With dead ends: 12038 [2020-12-22 02:11:39,706 INFO L226 Difference]: Without dead ends: 5926 [2020-12-22 02:11:39,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:11:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2020-12-22 02:11:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2020-12-22 02:11:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5926 states. [2020-12-22 02:11:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6437 transitions. [2020-12-22 02:11:39,820 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6437 transitions. Word has length 471 [2020-12-22 02:11:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:39,821 INFO L481 AbstractCegarLoop]: Abstraction has 5926 states and 6437 transitions. [2020-12-22 02:11:39,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:11:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6437 transitions. [2020-12-22 02:11:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-12-22 02:11:39,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:39,834 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:39,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:11:39,834 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1468600354, now seen corresponding path program 1 times [2020-12-22 02:11:39,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:39,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718333675] [2020-12-22 02:11:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-22 02:11:40,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718333675] [2020-12-22 02:11:40,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:40,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001469693] [2020-12-22 02:11:40,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:40,347 INFO L87 Difference]: Start difference. First operand 5926 states and 6437 transitions. Second operand 3 states. [2020-12-22 02:11:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:41,954 INFO L93 Difference]: Finished difference Result 14482 states and 15873 transitions. [2020-12-22 02:11:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:41,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-12-22 02:11:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:41,991 INFO L225 Difference]: With dead ends: 14482 [2020-12-22 02:11:41,992 INFO L226 Difference]: Without dead ends: 8887 [2020-12-22 02:11:42,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2020-12-22 02:11:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8558. [2020-12-22 02:11:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8558 states. [2020-12-22 02:11:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 9125 transitions. [2020-12-22 02:11:42,195 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 9125 transitions. Word has length 499 [2020-12-22 02:11:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:42,196 INFO L481 AbstractCegarLoop]: Abstraction has 8558 states and 9125 transitions. [2020-12-22 02:11:42,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 9125 transitions. [2020-12-22 02:11:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-12-22 02:11:42,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:42,212 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:42,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:11:42,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:42,214 INFO L82 PathProgramCache]: Analyzing trace with hash -571649018, now seen corresponding path program 1 times [2020-12-22 02:11:42,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:42,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422014412] [2020-12-22 02:11:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 02:11:42,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422014412] [2020-12-22 02:11:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542739438] [2020-12-22 02:11:42,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:42,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:42,749 INFO L87 Difference]: Start difference. First operand 8558 states and 9125 transitions. Second operand 3 states. [2020-12-22 02:11:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:44,510 INFO L93 Difference]: Finished difference Result 19746 states and 21239 transitions. [2020-12-22 02:11:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:44,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 562 [2020-12-22 02:11:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:44,538 INFO L225 Difference]: With dead ends: 19746 [2020-12-22 02:11:44,538 INFO L226 Difference]: Without dead ends: 11519 [2020-12-22 02:11:44,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2020-12-22 02:11:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11519. [2020-12-22 02:11:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11519 states. [2020-12-22 02:11:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 12205 transitions. [2020-12-22 02:11:44,733 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 12205 transitions. Word has length 562 [2020-12-22 02:11:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:44,734 INFO L481 AbstractCegarLoop]: Abstraction has 11519 states and 12205 transitions. [2020-12-22 02:11:44,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 12205 transitions. [2020-12-22 02:11:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2020-12-22 02:11:44,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:44,758 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:44,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:11:44,758 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -239575550, now seen corresponding path program 1 times [2020-12-22 02:11:44,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:44,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542994181] [2020-12-22 02:11:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-12-22 02:11:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542994181] [2020-12-22 02:11:45,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:45,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732988297] [2020-12-22 02:11:45,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:45,550 INFO L87 Difference]: Start difference. First operand 11519 states and 12205 transitions. Second operand 3 states. [2020-12-22 02:11:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:47,245 INFO L93 Difference]: Finished difference Result 25668 states and 27412 transitions. [2020-12-22 02:11:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:47,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 722 [2020-12-22 02:11:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:47,274 INFO L225 Difference]: With dead ends: 25668 [2020-12-22 02:11:47,274 INFO L226 Difference]: Without dead ends: 14480 [2020-12-22 02:11:47,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2020-12-22 02:11:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 13493. [2020-12-22 02:11:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:11:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 14263 transitions. [2020-12-22 02:11:47,483 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 14263 transitions. Word has length 722 [2020-12-22 02:11:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:47,485 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 14263 transitions. [2020-12-22 02:11:47,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 14263 transitions. [2020-12-22 02:11:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2020-12-22 02:11:47,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:47,564 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:11:47,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:11:47,564 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash -447258478, now seen corresponding path program 1 times [2020-12-22 02:11:47,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:47,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856981842] [2020-12-22 02:11:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2020-12-22 02:11:48,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856981842] [2020-12-22 02:11:48,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:48,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:48,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553520410] [2020-12-22 02:11:48,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:48,280 INFO L87 Difference]: Start difference. First operand 13493 states and 14263 transitions. Second operand 3 states. [2020-12-22 02:11:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:50,042 INFO L93 Difference]: Finished difference Result 28629 states and 30307 transitions. [2020-12-22 02:11:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:50,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 747 [2020-12-22 02:11:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:50,076 INFO L225 Difference]: With dead ends: 28629 [2020-12-22 02:11:50,077 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:11:50,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:11:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 15138. [2020-12-22 02:11:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2020-12-22 02:11:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15983 transitions. [2020-12-22 02:11:50,277 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15983 transitions. Word has length 747 [2020-12-22 02:11:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:50,278 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 15983 transitions. [2020-12-22 02:11:50,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15983 transitions. [2020-12-22 02:11:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-12-22 02:11:50,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:50,297 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:50,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:11:50,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1319594356, now seen corresponding path program 1 times [2020-12-22 02:11:50,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:50,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034770310] [2020-12-22 02:11:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 78 proven. 573 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2020-12-22 02:11:51,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034770310] [2020-12-22 02:11:51,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665454879] [2020-12-22 02:11:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:11:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:11:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:11:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2020-12-22 02:11:53,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:11:53,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 02:11:53,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487067828] [2020-12-22 02:11:53,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:11:53,562 INFO L87 Difference]: Start difference. First operand 15138 states and 15983 transitions. Second operand 3 states. [2020-12-22 02:11:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:55,216 INFO L93 Difference]: Finished difference Result 29945 states and 31633 transitions. [2020-12-22 02:11:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:55,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 839 [2020-12-22 02:11:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:55,247 INFO L225 Difference]: With dead ends: 29945 [2020-12-22 02:11:55,247 INFO L226 Difference]: Without dead ends: 15138 [2020-12-22 02:11:55,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:11:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2020-12-22 02:11:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 15138. [2020-12-22 02:11:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2020-12-22 02:11:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15857 transitions. [2020-12-22 02:11:55,459 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15857 transitions. Word has length 839 [2020-12-22 02:11:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:55,460 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 15857 transitions. [2020-12-22 02:11:55,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15857 transitions. [2020-12-22 02:11:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2020-12-22 02:11:55,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:55,483 INFO L422 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:55,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 02:11:55,699 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash 436504049, now seen corresponding path program 1 times [2020-12-22 02:11:55,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:55,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680896587] [2020-12-22 02:11:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:11:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 681 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2020-12-22 02:11:56,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680896587] [2020-12-22 02:11:56,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:11:56,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:11:56,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732002395] [2020-12-22 02:11:56,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:11:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:11:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:11:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:56,778 INFO L87 Difference]: Start difference. First operand 15138 states and 15857 transitions. Second operand 3 states. [2020-12-22 02:11:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:11:58,499 INFO L93 Difference]: Finished difference Result 30603 states and 32044 transitions. [2020-12-22 02:11:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:11:58,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 901 [2020-12-22 02:11:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:11:58,522 INFO L225 Difference]: With dead ends: 30603 [2020-12-22 02:11:58,522 INFO L226 Difference]: Without dead ends: 15138 [2020-12-22 02:11:58,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:11:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2020-12-22 02:11:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 14480. [2020-12-22 02:11:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2020-12-22 02:11:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14945 transitions. [2020-12-22 02:11:58,718 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14945 transitions. Word has length 901 [2020-12-22 02:11:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:11:58,719 INFO L481 AbstractCegarLoop]: Abstraction has 14480 states and 14945 transitions. [2020-12-22 02:11:58,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:11:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14945 transitions. [2020-12-22 02:11:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2020-12-22 02:11:58,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:11:58,747 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:11:58,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:11:58,747 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:11:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:11:58,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1060069194, now seen corresponding path program 1 times [2020-12-22 02:11:58,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:11:58,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012969117] [2020-12-22 02:11:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:11:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-12-22 02:12:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012969117] [2020-12-22 02:12:00,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:00,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:12:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409369125] [2020-12-22 02:12:00,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:12:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:12:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:00,063 INFO L87 Difference]: Start difference. First operand 14480 states and 14945 transitions. Second operand 3 states. [2020-12-22 02:12:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:01,752 INFO L93 Difference]: Finished difference Result 31590 states and 32619 transitions. [2020-12-22 02:12:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:12:01,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1140 [2020-12-22 02:12:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:01,772 INFO L225 Difference]: With dead ends: 31590 [2020-12-22 02:12:01,772 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:12:01,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:12:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 14809. [2020-12-22 02:12:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14809 states. [2020-12-22 02:12:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15219 transitions. [2020-12-22 02:12:01,958 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15219 transitions. Word has length 1140 [2020-12-22 02:12:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:01,959 INFO L481 AbstractCegarLoop]: Abstraction has 14809 states and 15219 transitions. [2020-12-22 02:12:01,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:12:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15219 transitions. [2020-12-22 02:12:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1286 [2020-12-22 02:12:01,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:01,991 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:12:01,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:12:01,991 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash 632104280, now seen corresponding path program 1 times [2020-12-22 02:12:01,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:01,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360386234] [2020-12-22 02:12:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3494 backedges. 2062 proven. 0 refuted. 0 times theorem prover too weak. 1432 trivial. 0 not checked. [2020-12-22 02:12:03,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360386234] [2020-12-22 02:12:03,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:03,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:12:03,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567569491] [2020-12-22 02:12:03,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:12:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:12:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:03,838 INFO L87 Difference]: Start difference. First operand 14809 states and 15219 transitions. Second operand 3 states. [2020-12-22 02:12:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:05,616 INFO L93 Difference]: Finished difference Result 30274 states and 31136 transitions. [2020-12-22 02:12:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:12:05,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1285 [2020-12-22 02:12:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:05,637 INFO L225 Difference]: With dead ends: 30274 [2020-12-22 02:12:05,637 INFO L226 Difference]: Without dead ends: 15796 [2020-12-22 02:12:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2020-12-22 02:12:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15138. [2020-12-22 02:12:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2020-12-22 02:12:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15531 transitions. [2020-12-22 02:12:05,834 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15531 transitions. Word has length 1285 [2020-12-22 02:12:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:05,834 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 15531 transitions. [2020-12-22 02:12:05,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:12:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15531 transitions. [2020-12-22 02:12:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1340 [2020-12-22 02:12:05,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:05,858 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:05,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:12:05,858 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1654678547, now seen corresponding path program 1 times [2020-12-22 02:12:05,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:05,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611215773] [2020-12-22 02:12:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3498 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2020-12-22 02:12:07,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611215773] [2020-12-22 02:12:07,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:07,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:12:07,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175237015] [2020-12-22 02:12:07,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:12:07,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:07,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:12:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:12:07,749 INFO L87 Difference]: Start difference. First operand 15138 states and 15531 transitions. Second operand 4 states. [2020-12-22 02:12:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:10,005 INFO L93 Difference]: Finished difference Result 15802 states and 16196 transitions. [2020-12-22 02:12:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:12:10,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1339 [2020-12-22 02:12:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:10,020 INFO L225 Difference]: With dead ends: 15802 [2020-12-22 02:12:10,020 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:12:10,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:12:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:12:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 15138. [2020-12-22 02:12:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2020-12-22 02:12:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15530 transitions. [2020-12-22 02:12:10,217 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15530 transitions. Word has length 1339 [2020-12-22 02:12:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:10,218 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 15530 transitions. [2020-12-22 02:12:10,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:12:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15530 transitions. [2020-12-22 02:12:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1609 [2020-12-22 02:12:10,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:10,256 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, 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, 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, 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, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:10,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:12:10,257 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:10,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1254800628, now seen corresponding path program 1 times [2020-12-22 02:12:10,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:10,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433695108] [2020-12-22 02:12:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4008 backedges. 2923 proven. 0 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2020-12-22 02:12:13,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433695108] [2020-12-22 02:12:13,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:13,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 02:12:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688270657] [2020-12-22 02:12:13,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:12:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:12:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:12:13,047 INFO L87 Difference]: Start difference. First operand 15138 states and 15530 transitions. Second operand 5 states. [2020-12-22 02:12:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:16,595 INFO L93 Difference]: Finished difference Result 30944 states and 31735 transitions. [2020-12-22 02:12:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:12:16,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1608 [2020-12-22 02:12:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:16,612 INFO L225 Difference]: With dead ends: 30944 [2020-12-22 02:12:16,612 INFO L226 Difference]: Without dead ends: 16137 [2020-12-22 02:12:16,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:12:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16137 states. [2020-12-22 02:12:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16137 to 15467. [2020-12-22 02:12:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15467 states. [2020-12-22 02:12:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15853 transitions. [2020-12-22 02:12:16,786 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15853 transitions. Word has length 1608 [2020-12-22 02:12:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:16,787 INFO L481 AbstractCegarLoop]: Abstraction has 15467 states and 15853 transitions. [2020-12-22 02:12:16,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:12:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15853 transitions. [2020-12-22 02:12:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1779 [2020-12-22 02:12:16,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:16,820 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 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, 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, 6, 6, 6, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:16,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:12:16,821 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -759896909, now seen corresponding path program 1 times [2020-12-22 02:12:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:16,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133917103] [2020-12-22 02:12:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5440 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 5207 trivial. 0 not checked. [2020-12-22 02:12:19,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133917103] [2020-12-22 02:12:19,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:19,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:12:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195074611] [2020-12-22 02:12:19,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:12:19,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:19,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:12:19,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:19,144 INFO L87 Difference]: Start difference. First operand 15467 states and 15853 transitions. Second operand 3 states. [2020-12-22 02:12:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:20,886 INFO L93 Difference]: Finished difference Result 30932 states and 31703 transitions. [2020-12-22 02:12:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:12:20,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1778 [2020-12-22 02:12:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:20,902 INFO L225 Difference]: With dead ends: 30932 [2020-12-22 02:12:20,903 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:12:20,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:12:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:12:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 15467. [2020-12-22 02:12:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15467 states. [2020-12-22 02:12:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15827 transitions. [2020-12-22 02:12:21,063 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15827 transitions. Word has length 1778 [2020-12-22 02:12:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:21,065 INFO L481 AbstractCegarLoop]: Abstraction has 15467 states and 15827 transitions. [2020-12-22 02:12:21,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:12:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15827 transitions. [2020-12-22 02:12:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1781 [2020-12-22 02:12:21,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:21,100 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 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, 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, 6, 6, 6, 6, 6, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:21,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:12:21,100 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1846863538, now seen corresponding path program 1 times [2020-12-22 02:12:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:21,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214896688] [2020-12-22 02:12:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5450 backedges. 1495 proven. 0 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2020-12-22 02:12:23,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214896688] [2020-12-22 02:12:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:12:23,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:12:23,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687956491] [2020-12-22 02:12:23,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:12:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:12:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:12:23,613 INFO L87 Difference]: Start difference. First operand 15467 states and 15827 transitions. Second operand 4 states. [2020-12-22 02:12:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:25,991 INFO L93 Difference]: Finished difference Result 34230 states and 35067 transitions. [2020-12-22 02:12:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:12:25,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1780 [2020-12-22 02:12:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:26,012 INFO L225 Difference]: With dead ends: 34230 [2020-12-22 02:12:26,012 INFO L226 Difference]: Without dead ends: 19086 [2020-12-22 02:12:26,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:12:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19086 states. [2020-12-22 02:12:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19086 to 17441. [2020-12-22 02:12:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17441 states. [2020-12-22 02:12:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17441 states to 17441 states and 17855 transitions. [2020-12-22 02:12:26,293 INFO L78 Accepts]: Start accepts. Automaton has 17441 states and 17855 transitions. Word has length 1780 [2020-12-22 02:12:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:26,294 INFO L481 AbstractCegarLoop]: Abstraction has 17441 states and 17855 transitions. [2020-12-22 02:12:26,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:12:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17441 states and 17855 transitions. [2020-12-22 02:12:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1820 [2020-12-22 02:12:26,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:26,333 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 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, 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, 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, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:26,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:12:26,334 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2021671536, now seen corresponding path program 1 times [2020-12-22 02:12:26,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:26,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358305409] [2020-12-22 02:12:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5663 backedges. 3094 proven. 66 refuted. 0 times theorem prover too weak. 2503 trivial. 0 not checked. [2020-12-22 02:12:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358305409] [2020-12-22 02:12:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025453396] [2020-12-22 02:12:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:12:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 02:12:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:12:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5663 backedges. 2496 proven. 201 refuted. 0 times theorem prover too weak. 2966 trivial. 0 not checked. [2020-12-22 02:12:35,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:12:35,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2020-12-22 02:12:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890999582] [2020-12-22 02:12:35,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:12:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:12:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:12:35,735 INFO L87 Difference]: Start difference. First operand 17441 states and 17855 transitions. Second operand 7 states. [2020-12-22 02:12:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:42,767 INFO L93 Difference]: Finished difference Result 45081 states and 46154 transitions. [2020-12-22 02:12:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:12:42,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1819 [2020-12-22 02:12:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:42,852 INFO L225 Difference]: With dead ends: 45081 [2020-12-22 02:12:42,852 INFO L226 Difference]: Without dead ends: 27971 [2020-12-22 02:12:42,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1824 GetRequests, 1817 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:12:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27971 states. [2020-12-22 02:12:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27971 to 23363. [2020-12-22 02:12:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23363 states. [2020-12-22 02:12:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23363 states to 23363 states and 23946 transitions. [2020-12-22 02:12:43,269 INFO L78 Accepts]: Start accepts. Automaton has 23363 states and 23946 transitions. Word has length 1819 [2020-12-22 02:12:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:43,270 INFO L481 AbstractCegarLoop]: Abstraction has 23363 states and 23946 transitions. [2020-12-22 02:12:43,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:12:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23363 states and 23946 transitions. [2020-12-22 02:12:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1850 [2020-12-22 02:12:43,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:43,328 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, 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, 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, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:43,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:12:43,542 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2087170001, now seen corresponding path program 1 times [2020-12-22 02:12:43,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:43,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149919804] [2020-12-22 02:12:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6298 backedges. 2408 proven. 156 refuted. 0 times theorem prover too weak. 3734 trivial. 0 not checked. [2020-12-22 02:12:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149919804] [2020-12-22 02:12:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949915091] [2020-12-22 02:12:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:12:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:12:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:12:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:12:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6298 backedges. 2564 proven. 0 refuted. 0 times theorem prover too weak. 3734 trivial. 0 not checked. [2020-12-22 02:12:52,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:12:52,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 02:12:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312411048] [2020-12-22 02:12:52,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:12:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:12:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:12:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:12:52,206 INFO L87 Difference]: Start difference. First operand 23363 states and 23946 transitions. Second operand 3 states. [2020-12-22 02:12:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:12:54,135 INFO L93 Difference]: Finished difference Result 48369 states and 49575 transitions. [2020-12-22 02:12:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:12:54,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1849 [2020-12-22 02:12:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:12:54,162 INFO L225 Difference]: With dead ends: 48369 [2020-12-22 02:12:54,162 INFO L226 Difference]: Without dead ends: 25337 [2020-12-22 02:12:54,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1853 GetRequests, 1848 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:12:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25337 states. [2020-12-22 02:12:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25337 to 23692. [2020-12-22 02:12:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23692 states. [2020-12-22 02:12:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23692 states to 23692 states and 24257 transitions. [2020-12-22 02:12:54,545 INFO L78 Accepts]: Start accepts. Automaton has 23692 states and 24257 transitions. Word has length 1849 [2020-12-22 02:12:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:12:54,546 INFO L481 AbstractCegarLoop]: Abstraction has 23692 states and 24257 transitions. [2020-12-22 02:12:54,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:12:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23692 states and 24257 transitions. [2020-12-22 02:12:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1958 [2020-12-22 02:12:54,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:12:54,594 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, 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, 10, 10, 9, 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, 8, 8, 8, 8, 8, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:12:54,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:12:54,807 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:12:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:12:54,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1861409359, now seen corresponding path program 1 times [2020-12-22 02:12:54,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:12:54,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835876631] [2020-12-22 02:12:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:12:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 3381 proven. 1581 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-22 02:13:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835876631] [2020-12-22 02:13:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15560332] [2020-12-22 02:13:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:13:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 2281 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:13:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:13:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 3357 proven. 0 refuted. 0 times theorem prover too weak. 3126 trivial. 0 not checked. [2020-12-22 02:13:05,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:13:05,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 02:13:05,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461032891] [2020-12-22 02:13:05,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:13:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:13:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:13:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:13:05,303 INFO L87 Difference]: Start difference. First operand 23692 states and 24257 transitions. Second operand 3 states. [2020-12-22 02:13:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:13:07,367 INFO L93 Difference]: Finished difference Result 47053 states and 48181 transitions. [2020-12-22 02:13:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:13:07,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1957 [2020-12-22 02:13:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:13:07,394 INFO L225 Difference]: With dead ends: 47053 [2020-12-22 02:13:07,394 INFO L226 Difference]: Without dead ends: 23692 [2020-12-22 02:13:07,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1962 GetRequests, 1958 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:13:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23692 states. [2020-12-22 02:13:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23692 to 23692. [2020-12-22 02:13:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23692 states. [2020-12-22 02:13:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23692 states to 23692 states and 24256 transitions. [2020-12-22 02:13:07,672 INFO L78 Accepts]: Start accepts. Automaton has 23692 states and 24256 transitions. Word has length 1957 [2020-12-22 02:13:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:13:07,673 INFO L481 AbstractCegarLoop]: Abstraction has 23692 states and 24256 transitions. [2020-12-22 02:13:07,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:13:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23692 states and 24256 transitions. [2020-12-22 02:13:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2171 [2020-12-22 02:13:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:13:07,855 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, 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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, 3, 3, 3, 3, 3, 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] [2020-12-22 02:13:08,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:13:08,057 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:13:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:13:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash -188907198, now seen corresponding path program 1 times [2020-12-22 02:13:08,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:13:08,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308505100] [2020-12-22 02:13:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:13:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 3991 proven. 1035 refuted. 0 times theorem prover too weak. 2669 trivial. 0 not checked. [2020-12-22 02:13:14,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308505100] [2020-12-22 02:13:14,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420056206] [2020-12-22 02:13:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:13:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:13:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:13:17,109 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 02:13:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 4312 proven. 0 refuted. 0 times theorem prover too weak. 3383 trivial. 0 not checked. [2020-12-22 02:13:19,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:13:19,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 02:13:19,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370463394] [2020-12-22 02:13:19,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:13:19,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:13:19,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:13:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:13:19,761 INFO L87 Difference]: Start difference. First operand 23692 states and 24256 transitions. Second operand 3 states. [2020-12-22 02:13:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:13:21,927 INFO L93 Difference]: Finished difference Result 48698 states and 49858 transitions. [2020-12-22 02:13:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:13:21,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2170 [2020-12-22 02:13:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:13:21,969 INFO L225 Difference]: With dead ends: 48698 [2020-12-22 02:13:21,970 INFO L226 Difference]: Without dead ends: 25337 [2020-12-22 02:13:21,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2178 GetRequests, 2171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:13:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25337 states. [2020-12-22 02:13:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25337 to 24679. [2020-12-22 02:13:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24679 states. [2020-12-22 02:13:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24679 states to 24679 states and 25245 transitions. [2020-12-22 02:13:22,318 INFO L78 Accepts]: Start accepts. Automaton has 24679 states and 25245 transitions. Word has length 2170 [2020-12-22 02:13:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:13:22,319 INFO L481 AbstractCegarLoop]: Abstraction has 24679 states and 25245 transitions. [2020-12-22 02:13:22,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:13:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 24679 states and 25245 transitions. [2020-12-22 02:13:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2196 [2020-12-22 02:13:22,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:13:22,370 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, 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, 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, 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, 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, 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, 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, 3, 3, 3, 3, 3, 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] [2020-12-22 02:13:22,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 02:13:22,580 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:13:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:13:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash 603195286, now seen corresponding path program 1 times [2020-12-22 02:13:22,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:13:22,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279066766] [2020-12-22 02:13:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:13:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 4462 proven. 0 refuted. 0 times theorem prover too weak. 3458 trivial. 0 not checked. [2020-12-22 02:13:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279066766] [2020-12-22 02:13:26,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:13:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:13:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482300488] [2020-12-22 02:13:26,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:13:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:13:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:13:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:13:26,157 INFO L87 Difference]: Start difference. First operand 24679 states and 25245 transitions. Second operand 3 states. [2020-12-22 02:13:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:13:28,181 INFO L93 Difference]: Finished difference Result 49027 states and 50157 transitions. [2020-12-22 02:13:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:13:28,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2195 [2020-12-22 02:13:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:13:28,207 INFO L225 Difference]: With dead ends: 49027 [2020-12-22 02:13:28,208 INFO L226 Difference]: Without dead ends: 24679 [2020-12-22 02:13:28,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:13:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24679 states. [2020-12-22 02:13:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24679 to 21389. [2020-12-22 02:13:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21389 states. [2020-12-22 02:13:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 21736 transitions. [2020-12-22 02:13:28,454 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 21736 transitions. Word has length 2195 [2020-12-22 02:13:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:13:28,455 INFO L481 AbstractCegarLoop]: Abstraction has 21389 states and 21736 transitions. [2020-12-22 02:13:28,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:13:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 21736 transitions. [2020-12-22 02:13:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2264 [2020-12-22 02:13:28,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:13:28,496 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, 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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, 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] [2020-12-22 02:13:28,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 02:13:28,497 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:13:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:13:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -803601504, now seen corresponding path program 1 times [2020-12-22 02:13:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:13:28,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918871781] [2020-12-22 02:13:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:13:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8386 backedges. 4204 proven. 1128 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2020-12-22 02:13:35,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918871781] [2020-12-22 02:13:35,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119119879] [2020-12-22 02:13:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:13:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:13:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:13:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:13:37,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:13:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8386 backedges. 4874 proven. 250 refuted. 0 times theorem prover too weak. 3262 trivial. 0 not checked. [2020-12-22 02:13:42,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:13:42,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2020-12-22 02:13:42,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740048565] [2020-12-22 02:13:42,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 02:13:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:13:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 02:13:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 02:13:42,763 INFO L87 Difference]: Start difference. First operand 21389 states and 21736 transitions. Second operand 10 states. [2020-12-22 02:13:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:13:58,620 INFO L93 Difference]: Finished difference Result 54879 states and 55757 transitions. [2020-12-22 02:13:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 02:13:58,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2263 [2020-12-22 02:13:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:13:58,648 INFO L225 Difference]: With dead ends: 54879 [2020-12-22 02:13:58,649 INFO L226 Difference]: Without dead ends: 33821 [2020-12-22 02:13:58,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2299 GetRequests, 2274 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-12-22 02:13:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33821 states. [2020-12-22 02:13:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33821 to 22047. [2020-12-22 02:13:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22047 states. [2020-12-22 02:13:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22047 states to 22047 states and 22392 transitions. [2020-12-22 02:13:58,921 INFO L78 Accepts]: Start accepts. Automaton has 22047 states and 22392 transitions. Word has length 2263 [2020-12-22 02:13:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:13:58,922 INFO L481 AbstractCegarLoop]: Abstraction has 22047 states and 22392 transitions. [2020-12-22 02:13:58,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 02:13:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 22047 states and 22392 transitions. [2020-12-22 02:13:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2303 [2020-12-22 02:13:58,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:13:58,981 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 10, 10, 10, 10, 10, 9, 9, 9, 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, 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:13:59,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:13:59,195 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:13:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:13:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1510734971, now seen corresponding path program 1 times [2020-12-22 02:13:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:13:59,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604268102] [2020-12-22 02:13:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:13:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9229 backedges. 4939 proven. 75 refuted. 0 times theorem prover too weak. 4215 trivial. 0 not checked. [2020-12-22 02:14:03,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604268102] [2020-12-22 02:14:03,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862996836] [2020-12-22 02:14:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:14:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:14:04,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:14:05,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:14:05,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:14:05,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:14:05,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:14:05,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:14:05,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:14:05,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:14:05,781 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 02:14:05,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:14:05,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:14:05,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:14:05,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 02:14:05,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:14:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9229 backedges. 5010 proven. 0 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2020-12-22 02:14:09,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:14:09,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-22 02:14:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535327146] [2020-12-22 02:14:09,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:14:09,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:14:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:14:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:14:09,082 INFO L87 Difference]: Start difference. First operand 22047 states and 22392 transitions. Second operand 4 states. [2020-12-22 02:14:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:14:12,001 INFO L93 Difference]: Finished difference Result 44750 states and 45450 transitions. [2020-12-22 02:14:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:14:12,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2302 [2020-12-22 02:14:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:14:12,025 INFO L225 Difference]: With dead ends: 44750 [2020-12-22 02:14:12,025 INFO L226 Difference]: Without dead ends: 23034 [2020-12-22 02:14:12,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2310 GetRequests, 2305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:14:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23034 states. [2020-12-22 02:14:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23034 to 22376. [2020-12-22 02:14:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22376 states. [2020-12-22 02:14:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22376 states to 22376 states and 22724 transitions. [2020-12-22 02:14:12,281 INFO L78 Accepts]: Start accepts. Automaton has 22376 states and 22724 transitions. Word has length 2302 [2020-12-22 02:14:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:14:12,283 INFO L481 AbstractCegarLoop]: Abstraction has 22376 states and 22724 transitions. [2020-12-22 02:14:12,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:14:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 22376 states and 22724 transitions. [2020-12-22 02:14:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2356 [2020-12-22 02:14:12,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:14:12,341 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 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, 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, 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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] [2020-12-22 02:14:12,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 02:14:12,555 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:14:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:14:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1162253158, now seen corresponding path program 1 times [2020-12-22 02:14:12,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:14:12,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441066487] [2020-12-22 02:14:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:14:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9325 backedges. 5664 proven. 0 refuted. 0 times theorem prover too weak. 3661 trivial. 0 not checked. [2020-12-22 02:14:16,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441066487] [2020-12-22 02:14:16,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:14:16,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:14:16,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337365059] [2020-12-22 02:14:16,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:14:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:14:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:14:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:14:16,540 INFO L87 Difference]: Start difference. First operand 22376 states and 22724 transitions. Second operand 4 states. [2020-12-22 02:14:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:14:19,870 INFO L93 Difference]: Finished difference Result 49027 states and 49780 transitions. [2020-12-22 02:14:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:14:19,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2355 [2020-12-22 02:14:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:14:19,898 INFO L225 Difference]: With dead ends: 49027 [2020-12-22 02:14:19,898 INFO L226 Difference]: Without dead ends: 26982 [2020-12-22 02:14:19,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:14:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26982 states. [2020-12-22 02:14:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26982 to 23692. [2020-12-22 02:14:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23692 states. [2020-12-22 02:14:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23692 states to 23692 states and 24050 transitions. [2020-12-22 02:14:20,151 INFO L78 Accepts]: Start accepts. Automaton has 23692 states and 24050 transitions. Word has length 2355 [2020-12-22 02:14:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:14:20,152 INFO L481 AbstractCegarLoop]: Abstraction has 23692 states and 24050 transitions. [2020-12-22 02:14:20,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:14:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23692 states and 24050 transitions. [2020-12-22 02:14:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2372 [2020-12-22 02:14:20,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:14:20,195 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 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, 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, 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, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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] [2020-12-22 02:14:20,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 02:14:20,195 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:14:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:14:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2073687308, now seen corresponding path program 1 times [2020-12-22 02:14:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:14:20,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370549738] [2020-12-22 02:14:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:14:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9745 backedges. 5895 proven. 79 refuted. 0 times theorem prover too weak. 3771 trivial. 0 not checked. [2020-12-22 02:14:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370549738] [2020-12-22 02:14:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359930680] [2020-12-22 02:14:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:14:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:14:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:14:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9745 backedges. 6088 proven. 0 refuted. 0 times theorem prover too weak. 3657 trivial. 0 not checked. [2020-12-22 02:14:30,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:14:30,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 02:14:30,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443889929] [2020-12-22 02:14:30,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:14:30,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:14:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:14:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:14:30,724 INFO L87 Difference]: Start difference. First operand 23692 states and 24050 transitions. Second operand 3 states. [2020-12-22 02:14:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:14:32,761 INFO L93 Difference]: Finished difference Result 47711 states and 48432 transitions. [2020-12-22 02:14:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:14:32,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2371 [2020-12-22 02:14:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:14:32,786 INFO L225 Difference]: With dead ends: 47711 [2020-12-22 02:14:32,786 INFO L226 Difference]: Without dead ends: 24350 [2020-12-22 02:14:32,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2371 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:14:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24350 states. [2020-12-22 02:14:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24350 to 23034. [2020-12-22 02:14:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23034 states. [2020-12-22 02:14:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23034 states to 23034 states and 23355 transitions. [2020-12-22 02:14:33,036 INFO L78 Accepts]: Start accepts. Automaton has 23034 states and 23355 transitions. Word has length 2371 [2020-12-22 02:14:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:14:33,037 INFO L481 AbstractCegarLoop]: Abstraction has 23034 states and 23355 transitions. [2020-12-22 02:14:33,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:14:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 23034 states and 23355 transitions. [2020-12-22 02:14:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2448 [2020-12-22 02:14:33,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:14:33,088 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:14:33,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 02:14:33,303 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:14:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:14:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1968685351, now seen corresponding path program 1 times [2020-12-22 02:14:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:14:33,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784865485] [2020-12-22 02:14:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10565 backedges. 7051 proven. 0 refuted. 0 times theorem prover too weak. 3514 trivial. 0 not checked. [2020-12-22 02:14:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784865485] [2020-12-22 02:14:39,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:14:39,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 02:14:39,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288966095] [2020-12-22 02:14:39,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:14:39,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:14:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:14:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:14:39,433 INFO L87 Difference]: Start difference. First operand 23034 states and 23355 transitions. Second operand 7 states. [2020-12-22 02:14:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:14:49,331 INFO L93 Difference]: Finished difference Result 64398 states and 65309 transitions. [2020-12-22 02:14:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 02:14:49,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2447 [2020-12-22 02:14:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:14:49,377 INFO L225 Difference]: With dead ends: 64398 [2020-12-22 02:14:49,377 INFO L226 Difference]: Without dead ends: 41695 [2020-12-22 02:14:49,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-22 02:14:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41695 states. [2020-12-22 02:14:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41695 to 22705. [2020-12-22 02:14:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22705 states. [2020-12-22 02:14:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 23024 transitions. [2020-12-22 02:14:49,723 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 23024 transitions. Word has length 2447 [2020-12-22 02:14:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:14:49,724 INFO L481 AbstractCegarLoop]: Abstraction has 22705 states and 23024 transitions. [2020-12-22 02:14:49,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:14:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 23024 transitions. [2020-12-22 02:14:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2461 [2020-12-22 02:14:49,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:14:49,771 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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, 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, 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, 3, 3, 3, 3, 3, 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] [2020-12-22 02:14:49,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 02:14:49,772 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:14:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:14:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1694381099, now seen corresponding path program 1 times [2020-12-22 02:14:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:14:49,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415984866] [2020-12-22 02:14:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:14:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:14:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10494 backedges. 4491 proven. 0 refuted. 0 times theorem prover too weak. 6003 trivial. 0 not checked. [2020-12-22 02:14:54,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415984866] [2020-12-22 02:14:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:14:54,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:14:54,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769429833] [2020-12-22 02:14:54,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:14:54,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:14:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:14:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:14:54,358 INFO L87 Difference]: Start difference. First operand 22705 states and 23024 transitions. Second operand 3 states. [2020-12-22 02:14:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:14:56,503 INFO L93 Difference]: Finished difference Result 49029 states and 49719 transitions. [2020-12-22 02:14:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:14:56,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2460 [2020-12-22 02:14:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:14:56,529 INFO L225 Difference]: With dead ends: 49029 [2020-12-22 02:14:56,529 INFO L226 Difference]: Without dead ends: 26655 [2020-12-22 02:14:56,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:14:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26655 states.