/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/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:44:17,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:44:17,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:44:17,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:44:17,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:44:17,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:44:17,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:44:17,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:44:17,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:44:17,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:44:17,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:44:17,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:44:17,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:44:17,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:44:17,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:44:17,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:44:17,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:44:17,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:44:17,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:44:17,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:44:17,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:44:17,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:44:17,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:44:17,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:44:17,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:44:17,657 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:44:17,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:44:17,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:44:17,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:44:17,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:44:17,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:44:17,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:44:17,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:44:17,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:44:17,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:44:17,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:44:17,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:44:17,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:44:17,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:44:17,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:44:17,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:44:17,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:44:17,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:44:17,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:44:17,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:44:17,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:44:17,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:44:18,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:44:18,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:44:18,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:44:18,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:44:18,115 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:44:18,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:18,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d001da9e0/7df84a6b51314038b5c2782a9862b0f8/FLAGb5087ed66 [2020-12-22 07:44:18,979 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:44:18,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:18,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d001da9e0/7df84a6b51314038b5c2782a9862b0f8/FLAGb5087ed66 [2020-12-22 07:44:19,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d001da9e0/7df84a6b51314038b5c2782a9862b0f8 [2020-12-22 07:44:19,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:44:19,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:44:19,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:19,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:44:19,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:44:19,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:19,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@185f1abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19, skipping insertion in model container [2020-12-22 07:44:19,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:19,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:44:19,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:44:19,750 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/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2020-12-22 07:44:19,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:19,767 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:44:19,865 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/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2020-12-22 07:44:19,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:19,922 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:44:19,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19 WrapperNode [2020-12-22 07:44:19,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:19,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:19,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:44:19,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:44:19,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:19,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:20,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:44:20,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:44:20,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:44:20,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... [2020-12-22 07:44:20,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:44:20,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:44:20,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:44:20,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:44:20,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:44:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:44:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:44:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:44:20,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:44:21,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:44:21,699 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:44:21,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:21 BoogieIcfgContainer [2020-12-22 07:44:21,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:44:21,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:44:21,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:44:21,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:44:21,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:44:19" (1/3) ... [2020-12-22 07:44:21,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a881ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:21, skipping insertion in model container [2020-12-22 07:44:21,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:19" (2/3) ... [2020-12-22 07:44:21,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a881ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:21, skipping insertion in model container [2020-12-22 07:44:21,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:21" (3/3) ... [2020-12-22 07:44:21,711 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:21,718 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:44:21,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:44:21,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:44:21,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:44:21,785 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:44:21,785 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:44:21,786 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:44:21,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:44:21,786 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:44:21,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:44:21,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:44:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states. [2020-12-22 07:44:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:44:21,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:21,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:21,837 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1105173396, now seen corresponding path program 1 times [2020-12-22 07:44:21,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:21,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644193560] [2020-12-22 07:44:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:22,321 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 07:44:22,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644193560] [2020-12-22 07:44:22,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:22,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:44:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776777636] [2020-12-22 07:44:22,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:44:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:22,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:44:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:22,347 INFO L87 Difference]: Start difference. First operand 323 states. Second operand 2 states. [2020-12-22 07:44:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:22,428 INFO L93 Difference]: Finished difference Result 447 states and 797 transitions. [2020-12-22 07:44:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:44:22,430 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:44:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:22,467 INFO L225 Difference]: With dead ends: 447 [2020-12-22 07:44:22,470 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 07:44:22,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 07:44:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2020-12-22 07:44:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 07:44:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 574 transitions. [2020-12-22 07:44:22,550 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 574 transitions. Word has length 77 [2020-12-22 07:44:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:22,550 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 574 transitions. [2020-12-22 07:44:22,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:44:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 574 transitions. [2020-12-22 07:44:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:44:22,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:22,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:22,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:44:22,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:22,558 INFO L82 PathProgramCache]: Analyzing trace with hash 971159890, now seen corresponding path program 1 times [2020-12-22 07:44:22,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:22,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814651956] [2020-12-22 07:44:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:22,829 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 07:44:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814651956] [2020-12-22 07:44:22,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:22,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:44:22,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102660423] [2020-12-22 07:44:22,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:44:22,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:44:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:22,840 INFO L87 Difference]: Start difference. First operand 319 states and 574 transitions. Second operand 5 states. [2020-12-22 07:44:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:23,021 INFO L93 Difference]: Finished difference Result 446 states and 790 transitions. [2020-12-22 07:44:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:44:23,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:44:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:23,026 INFO L225 Difference]: With dead ends: 446 [2020-12-22 07:44:23,026 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 07:44:23,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 07:44:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2020-12-22 07:44:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 07:44:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 528 transitions. [2020-12-22 07:44:23,049 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 528 transitions. Word has length 77 [2020-12-22 07:44:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 528 transitions. [2020-12-22 07:44:23,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:44:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 528 transitions. [2020-12-22 07:44:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:44:23,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:23,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:23,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:44:23,057 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 750751880, now seen corresponding path program 1 times [2020-12-22 07:44:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:23,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574219898] [2020-12-22 07:44:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:23,289 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 07:44:23,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574219898] [2020-12-22 07:44:23,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:23,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627585942] [2020-12-22 07:44:23,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:23,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:23,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:23,298 INFO L87 Difference]: Start difference. First operand 319 states and 528 transitions. Second operand 3 states. [2020-12-22 07:44:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:23,361 INFO L93 Difference]: Finished difference Result 553 states and 930 transitions. [2020-12-22 07:44:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:23,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:44:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:23,366 INFO L225 Difference]: With dead ends: 553 [2020-12-22 07:44:23,366 INFO L226 Difference]: Without dead ends: 430 [2020-12-22 07:44:23,367 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 07:44:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-12-22 07:44:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 428. [2020-12-22 07:44:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-12-22 07:44:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 712 transitions. [2020-12-22 07:44:23,385 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 712 transitions. Word has length 122 [2020-12-22 07:44:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:23,386 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 712 transitions. [2020-12-22 07:44:23,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 712 transitions. [2020-12-22 07:44:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:44:23,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:23,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:23,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:44:23,391 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -44233893, now seen corresponding path program 1 times [2020-12-22 07:44:23,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:23,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14534913] [2020-12-22 07:44:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:23,560 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 07:44:23,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14534913] [2020-12-22 07:44:23,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:23,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:23,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473198055] [2020-12-22 07:44:23,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:23,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:23,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:23,563 INFO L87 Difference]: Start difference. First operand 428 states and 712 transitions. Second operand 3 states. [2020-12-22 07:44:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:23,602 INFO L93 Difference]: Finished difference Result 872 states and 1468 transitions. [2020-12-22 07:44:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:23,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:44:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:23,607 INFO L225 Difference]: With dead ends: 872 [2020-12-22 07:44:23,607 INFO L226 Difference]: Without dead ends: 640 [2020-12-22 07:44:23,609 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 07:44:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-12-22 07:44:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 638. [2020-12-22 07:44:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-12-22 07:44:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1069 transitions. [2020-12-22 07:44:23,631 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1069 transitions. Word has length 125 [2020-12-22 07:44:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:23,632 INFO L481 AbstractCegarLoop]: Abstraction has 638 states and 1069 transitions. [2020-12-22 07:44:23,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1069 transitions. [2020-12-22 07:44:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:44:23,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:23,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:23,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:44:23,635 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 487395088, now seen corresponding path program 1 times [2020-12-22 07:44:23,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:23,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400520117] [2020-12-22 07:44:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:23,769 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 07:44:23,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400520117] [2020-12-22 07:44:23,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020098439] [2020-12-22 07:44:23,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:23,772 INFO L87 Difference]: Start difference. First operand 638 states and 1069 transitions. Second operand 3 states. [2020-12-22 07:44:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:23,819 INFO L93 Difference]: Finished difference Result 1482 states and 2503 transitions. [2020-12-22 07:44:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:23,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:44:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:23,826 INFO L225 Difference]: With dead ends: 1482 [2020-12-22 07:44:23,826 INFO L226 Difference]: Without dead ends: 1040 [2020-12-22 07:44:23,828 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 07:44:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-12-22 07:44:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1038. [2020-12-22 07:44:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-12-22 07:44:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1745 transitions. [2020-12-22 07:44:23,861 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1745 transitions. Word has length 128 [2020-12-22 07:44:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:23,862 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1745 transitions. [2020-12-22 07:44:23,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1745 transitions. [2020-12-22 07:44:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:44:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:23,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:23,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:44:23,865 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1255785821, now seen corresponding path program 1 times [2020-12-22 07:44:23,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363587945] [2020-12-22 07:44:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:24,022 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 07:44:24,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363587945] [2020-12-22 07:44:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:24,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667882975] [2020-12-22 07:44:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:24,025 INFO L87 Difference]: Start difference. First operand 1038 states and 1745 transitions. Second operand 3 states. [2020-12-22 07:44:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:24,078 INFO L93 Difference]: Finished difference Result 2642 states and 4459 transitions. [2020-12-22 07:44:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:24,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:44:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:24,089 INFO L225 Difference]: With dead ends: 2642 [2020-12-22 07:44:24,089 INFO L226 Difference]: Without dead ends: 1800 [2020-12-22 07:44:24,091 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 07:44:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-12-22 07:44:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1798. [2020-12-22 07:44:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1798 states. [2020-12-22 07:44:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3021 transitions. [2020-12-22 07:44:24,150 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3021 transitions. Word has length 131 [2020-12-22 07:44:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:24,151 INFO L481 AbstractCegarLoop]: Abstraction has 1798 states and 3021 transitions. [2020-12-22 07:44:24,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3021 transitions. [2020-12-22 07:44:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:44:24,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:24,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:24,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:44:24,154 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 871480728, now seen corresponding path program 1 times [2020-12-22 07:44:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:24,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109988666] [2020-12-22 07:44:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:24,485 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 07:44:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109988666] [2020-12-22 07:44:24,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:24,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:44:24,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284951569] [2020-12-22 07:44:24,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:44:24,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:24,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:44:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:44:24,491 INFO L87 Difference]: Start difference. First operand 1798 states and 3021 transitions. Second operand 6 states. [2020-12-22 07:44:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:24,859 INFO L93 Difference]: Finished difference Result 6728 states and 11414 transitions. [2020-12-22 07:44:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:44:24,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:44:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:24,894 INFO L225 Difference]: With dead ends: 6728 [2020-12-22 07:44:24,895 INFO L226 Difference]: Without dead ends: 5126 [2020-12-22 07:44:24,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:44:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2020-12-22 07:44:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3291. [2020-12-22 07:44:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3291 states. [2020-12-22 07:44:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5539 transitions. [2020-12-22 07:44:25,054 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5539 transitions. Word has length 134 [2020-12-22 07:44:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:25,054 INFO L481 AbstractCegarLoop]: Abstraction has 3291 states and 5539 transitions. [2020-12-22 07:44:25,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:44:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5539 transitions. [2020-12-22 07:44:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:44:25,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:25,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:25,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:44:25,063 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash -848507773, now seen corresponding path program 1 times [2020-12-22 07:44:25,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:25,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882897725] [2020-12-22 07:44:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:25,358 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 07:44:25,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882897725] [2020-12-22 07:44:25,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:25,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:25,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741382366] [2020-12-22 07:44:25,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:25,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:25,361 INFO L87 Difference]: Start difference. First operand 3291 states and 5539 transitions. Second operand 4 states. [2020-12-22 07:44:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:25,607 INFO L93 Difference]: Finished difference Result 9691 states and 16418 transitions. [2020-12-22 07:44:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:25,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:44:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:25,642 INFO L225 Difference]: With dead ends: 9691 [2020-12-22 07:44:25,642 INFO L226 Difference]: Without dead ends: 6596 [2020-12-22 07:44:25,651 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 07:44:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2020-12-22 07:44:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 4881. [2020-12-22 07:44:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4881 states. [2020-12-22 07:44:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4881 states to 4881 states and 8229 transitions. [2020-12-22 07:44:25,872 INFO L78 Accepts]: Start accepts. Automaton has 4881 states and 8229 transitions. Word has length 135 [2020-12-22 07:44:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:25,873 INFO L481 AbstractCegarLoop]: Abstraction has 4881 states and 8229 transitions. [2020-12-22 07:44:25,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4881 states and 8229 transitions. [2020-12-22 07:44:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:44:25,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:25,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:25,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:44:25,879 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash 942022462, now seen corresponding path program 1 times [2020-12-22 07:44:25,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:25,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583062325] [2020-12-22 07:44:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:26,026 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 07:44:26,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583062325] [2020-12-22 07:44:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966852260] [2020-12-22 07:44:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:26,034 INFO L87 Difference]: Start difference. First operand 4881 states and 8229 transitions. Second operand 3 states. [2020-12-22 07:44:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:26,207 INFO L93 Difference]: Finished difference Result 9433 states and 15921 transitions. [2020-12-22 07:44:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:26,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:44:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:26,267 INFO L225 Difference]: With dead ends: 9433 [2020-12-22 07:44:26,267 INFO L226 Difference]: Without dead ends: 6887 [2020-12-22 07:44:26,274 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 07:44:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2020-12-22 07:44:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6885. [2020-12-22 07:44:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6885 states. [2020-12-22 07:44:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 11571 transitions. [2020-12-22 07:44:26,611 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 11571 transitions. Word has length 136 [2020-12-22 07:44:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:26,612 INFO L481 AbstractCegarLoop]: Abstraction has 6885 states and 11571 transitions. [2020-12-22 07:44:26,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 11571 transitions. [2020-12-22 07:44:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:44:26,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:26,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:26,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:44:26,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -506487182, now seen corresponding path program 1 times [2020-12-22 07:44:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:26,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219264508] [2020-12-22 07:44:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:26,726 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 07:44:26,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219264508] [2020-12-22 07:44:26,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:26,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:26,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375622045] [2020-12-22 07:44:26,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:26,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:26,728 INFO L87 Difference]: Start difference. First operand 6885 states and 11571 transitions. Second operand 3 states. [2020-12-22 07:44:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:26,979 INFO L93 Difference]: Finished difference Result 13265 states and 22321 transitions. [2020-12-22 07:44:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:26,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:44:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:27,009 INFO L225 Difference]: With dead ends: 13265 [2020-12-22 07:44:27,009 INFO L226 Difference]: Without dead ends: 9675 [2020-12-22 07:44:27,019 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 07:44:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9675 states. [2020-12-22 07:44:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9675 to 9673. [2020-12-22 07:44:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9673 states. [2020-12-22 07:44:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9673 states to 9673 states and 16201 transitions. [2020-12-22 07:44:27,403 INFO L78 Accepts]: Start accepts. Automaton has 9673 states and 16201 transitions. Word has length 136 [2020-12-22 07:44:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:27,404 INFO L481 AbstractCegarLoop]: Abstraction has 9673 states and 16201 transitions. [2020-12-22 07:44:27,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9673 states and 16201 transitions. [2020-12-22 07:44:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:44:27,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:27,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:27,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:44:27,407 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2094526018, now seen corresponding path program 1 times [2020-12-22 07:44:27,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:27,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775033613] [2020-12-22 07:44:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:27,524 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 07:44:27,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775033613] [2020-12-22 07:44:27,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:27,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:27,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600724090] [2020-12-22 07:44:27,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:27,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:27,529 INFO L87 Difference]: Start difference. First operand 9673 states and 16201 transitions. Second operand 3 states. [2020-12-22 07:44:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:27,942 INFO L93 Difference]: Finished difference Result 18525 states and 31067 transitions. [2020-12-22 07:44:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:27,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:44:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:27,979 INFO L225 Difference]: With dead ends: 18525 [2020-12-22 07:44:27,979 INFO L226 Difference]: Without dead ends: 13483 [2020-12-22 07:44:27,991 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 07:44:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13483 states. [2020-12-22 07:44:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13483 to 13481. [2020-12-22 07:44:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13481 states. [2020-12-22 07:44:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13481 states to 13481 states and 22493 transitions. [2020-12-22 07:44:28,500 INFO L78 Accepts]: Start accepts. Automaton has 13481 states and 22493 transitions. Word has length 136 [2020-12-22 07:44:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:28,501 INFO L481 AbstractCegarLoop]: Abstraction has 13481 states and 22493 transitions. [2020-12-22 07:44:28,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 13481 states and 22493 transitions. [2020-12-22 07:44:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:44:28,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:28,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:28,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:44:28,504 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1835427887, now seen corresponding path program 1 times [2020-12-22 07:44:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:28,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061334643] [2020-12-22 07:44:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:28,832 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 07:44:28,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061334643] [2020-12-22 07:44:28,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:28,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:28,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921251179] [2020-12-22 07:44:28,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:28,834 INFO L87 Difference]: Start difference. First operand 13481 states and 22493 transitions. Second operand 4 states. [2020-12-22 07:44:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:29,584 INFO L93 Difference]: Finished difference Result 43852 states and 73296 transitions. [2020-12-22 07:44:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:29,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:44:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:29,665 INFO L225 Difference]: With dead ends: 43852 [2020-12-22 07:44:29,666 INFO L226 Difference]: Without dead ends: 30731 [2020-12-22 07:44:29,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:44:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30731 states. [2020-12-22 07:44:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30731 to 21891. [2020-12-22 07:44:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21891 states. [2020-12-22 07:44:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21891 states to 21891 states and 36405 transitions. [2020-12-22 07:44:30,551 INFO L78 Accepts]: Start accepts. Automaton has 21891 states and 36405 transitions. Word has length 136 [2020-12-22 07:44:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:30,552 INFO L481 AbstractCegarLoop]: Abstraction has 21891 states and 36405 transitions. [2020-12-22 07:44:30,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 21891 states and 36405 transitions. [2020-12-22 07:44:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:44:30,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:30,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:30,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:44:30,555 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1829805838, now seen corresponding path program 1 times [2020-12-22 07:44:30,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:30,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041049489] [2020-12-22 07:44:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:30,767 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 07:44:30,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041049489] [2020-12-22 07:44:30,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:30,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:30,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299546300] [2020-12-22 07:44:30,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:30,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:30,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:30,775 INFO L87 Difference]: Start difference. First operand 21891 states and 36405 transitions. Second operand 3 states. [2020-12-22 07:44:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:31,667 INFO L93 Difference]: Finished difference Result 48176 states and 80521 transitions. [2020-12-22 07:44:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:31,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:44:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:31,760 INFO L225 Difference]: With dead ends: 48176 [2020-12-22 07:44:31,760 INFO L226 Difference]: Without dead ends: 32839 [2020-12-22 07:44:31,856 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 07:44:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32839 states. [2020-12-22 07:44:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32839 to 32837. [2020-12-22 07:44:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32837 states. [2020-12-22 07:44:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32837 states to 32837 states and 54478 transitions. [2020-12-22 07:44:33,307 INFO L78 Accepts]: Start accepts. Automaton has 32837 states and 54478 transitions. Word has length 136 [2020-12-22 07:44:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:33,308 INFO L481 AbstractCegarLoop]: Abstraction has 32837 states and 54478 transitions. [2020-12-22 07:44:33,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32837 states and 54478 transitions. [2020-12-22 07:44:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:44:33,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:33,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:33,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:44:33,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash -692908230, now seen corresponding path program 1 times [2020-12-22 07:44:33,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:33,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498749653] [2020-12-22 07:44:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:33,455 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 07:44:33,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498749653] [2020-12-22 07:44:33,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:33,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:33,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730218242] [2020-12-22 07:44:33,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:33,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:33,457 INFO L87 Difference]: Start difference. First operand 32837 states and 54478 transitions. Second operand 4 states. [2020-12-22 07:44:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:35,439 INFO L93 Difference]: Finished difference Result 106740 states and 177291 transitions. [2020-12-22 07:44:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:35,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:44:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:35,652 INFO L225 Difference]: With dead ends: 106740 [2020-12-22 07:44:35,653 INFO L226 Difference]: Without dead ends: 74149 [2020-12-22 07:44:35,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:44:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74149 states. [2020-12-22 07:44:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74149 to 53350. [2020-12-22 07:44:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53350 states. [2020-12-22 07:44:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53350 states to 53350 states and 88136 transitions. [2020-12-22 07:44:38,038 INFO L78 Accepts]: Start accepts. Automaton has 53350 states and 88136 transitions. Word has length 137 [2020-12-22 07:44:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:38,039 INFO L481 AbstractCegarLoop]: Abstraction has 53350 states and 88136 transitions. [2020-12-22 07:44:38,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 53350 states and 88136 transitions. [2020-12-22 07:44:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:44:38,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:38,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:38,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:44:38,042 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1592912186, now seen corresponding path program 1 times [2020-12-22 07:44:38,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:38,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787375429] [2020-12-22 07:44:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:38,229 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 07:44:38,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787375429] [2020-12-22 07:44:38,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:38,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273792777] [2020-12-22 07:44:38,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:38,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:38,232 INFO L87 Difference]: Start difference. First operand 53350 states and 88136 transitions. Second operand 4 states. [2020-12-22 07:44:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:40,715 INFO L93 Difference]: Finished difference Result 175370 states and 290000 transitions. [2020-12-22 07:44:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:40,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:44:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:40,973 INFO L225 Difference]: With dead ends: 175370 [2020-12-22 07:44:40,974 INFO L226 Difference]: Without dead ends: 122266 [2020-12-22 07:44:41,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:44:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122266 states. [2020-12-22 07:44:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122266 to 85639. [2020-12-22 07:44:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85639 states. [2020-12-22 07:44:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85639 states to 85639 states and 140890 transitions. [2020-12-22 07:44:43,804 INFO L78 Accepts]: Start accepts. Automaton has 85639 states and 140890 transitions. Word has length 138 [2020-12-22 07:44:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 85639 states and 140890 transitions. [2020-12-22 07:44:43,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85639 states and 140890 transitions. [2020-12-22 07:44:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:44:43,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:43,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:43,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:44:43,811 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 298565918, now seen corresponding path program 1 times [2020-12-22 07:44:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:43,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626941610] [2020-12-22 07:44:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:44,053 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 07:44:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626941610] [2020-12-22 07:44:44,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:44,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942632813] [2020-12-22 07:44:44,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:44,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:44,057 INFO L87 Difference]: Start difference. First operand 85639 states and 140890 transitions. Second operand 4 states. [2020-12-22 07:44:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:47,667 INFO L93 Difference]: Finished difference Result 254333 states and 418204 transitions. [2020-12-22 07:44:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:47,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:44:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:48,224 INFO L225 Difference]: With dead ends: 254333 [2020-12-22 07:44:48,224 INFO L226 Difference]: Without dead ends: 168705 [2020-12-22 07:44:48,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:44:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168705 states. [2020-12-22 07:44:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168705 to 168703. [2020-12-22 07:44:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168703 states. [2020-12-22 07:44:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168703 states to 168703 states and 276156 transitions. [2020-12-22 07:44:53,288 INFO L78 Accepts]: Start accepts. Automaton has 168703 states and 276156 transitions. Word has length 140 [2020-12-22 07:44:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:53,289 INFO L481 AbstractCegarLoop]: Abstraction has 168703 states and 276156 transitions. [2020-12-22 07:44:53,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 168703 states and 276156 transitions. [2020-12-22 07:44:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:44:53,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:53,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:53,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:44:53,305 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash -176222731, now seen corresponding path program 1 times [2020-12-22 07:44:53,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:53,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257251133] [2020-12-22 07:44:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,384 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 07:44:53,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257251133] [2020-12-22 07:44:53,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:53,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49850292] [2020-12-22 07:44:53,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:53,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:53,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:53,386 INFO L87 Difference]: Start difference. First operand 168703 states and 276156 transitions. Second operand 3 states. [2020-12-22 07:44:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:58,458 INFO L93 Difference]: Finished difference Result 408788 states and 672224 transitions. [2020-12-22 07:44:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:58,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:44:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:59,122 INFO L225 Difference]: With dead ends: 408788 [2020-12-22 07:44:59,123 INFO L226 Difference]: Without dead ends: 240483 [2020-12-22 07:44:59,291 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 07:44:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240483 states. [2020-12-22 07:45:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240483 to 233859. [2020-12-22 07:45:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233859 states. [2020-12-22 07:45:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233859 states to 233859 states and 380915 transitions. [2020-12-22 07:45:06,267 INFO L78 Accepts]: Start accepts. Automaton has 233859 states and 380915 transitions. Word has length 141 [2020-12-22 07:45:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:06,267 INFO L481 AbstractCegarLoop]: Abstraction has 233859 states and 380915 transitions. [2020-12-22 07:45:06,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 233859 states and 380915 transitions. [2020-12-22 07:45:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:45:06,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:06,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:06,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:45:06,270 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1671679888, now seen corresponding path program 1 times [2020-12-22 07:45:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:06,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903870596] [2020-12-22 07:45:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:06,323 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 07:45:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903870596] [2020-12-22 07:45:06,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:06,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479768359] [2020-12-22 07:45:06,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:06,325 INFO L87 Difference]: Start difference. First operand 233859 states and 380915 transitions. Second operand 3 states. [2020-12-22 07:45:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:15,809 INFO L93 Difference]: Finished difference Result 701540 states and 1142682 transitions. [2020-12-22 07:45:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:15,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:45:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:17,038 INFO L225 Difference]: With dead ends: 701540 [2020-12-22 07:45:17,039 INFO L226 Difference]: Without dead ends: 467702 [2020-12-22 07:45:17,262 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 07:45:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467702 states. [2020-12-22 07:45:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467702 to 233872. [2020-12-22 07:45:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233872 states. [2020-12-22 07:45:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233872 states to 233872 states and 380934 transitions. [2020-12-22 07:45:26,119 INFO L78 Accepts]: Start accepts. Automaton has 233872 states and 380934 transitions. Word has length 142 [2020-12-22 07:45:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:26,120 INFO L481 AbstractCegarLoop]: Abstraction has 233872 states and 380934 transitions. [2020-12-22 07:45:26,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 233872 states and 380934 transitions. [2020-12-22 07:45:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:45:26,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:26,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:26,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:45:26,123 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash -939121031, now seen corresponding path program 1 times [2020-12-22 07:45:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:26,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196885001] [2020-12-22 07:45:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:26,260 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 07:45:26,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196885001] [2020-12-22 07:45:26,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:26,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:26,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318573201] [2020-12-22 07:45:26,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:26,263 INFO L87 Difference]: Start difference. First operand 233872 states and 380934 transitions. Second operand 3 states. [2020-12-22 07:45:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:36,873 INFO L93 Difference]: Finished difference Result 694259 states and 1130087 transitions. [2020-12-22 07:45:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:36,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:45:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:38,663 INFO L225 Difference]: With dead ends: 694259 [2020-12-22 07:45:38,663 INFO L226 Difference]: Without dead ends: 460525 [2020-12-22 07:45:39,026 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 07:45:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460525 states. [2020-12-22 07:45:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460525 to 460523. [2020-12-22 07:45:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460523 states. [2020-12-22 07:45:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460523 states to 460523 states and 746103 transitions. [2020-12-22 07:45:55,828 INFO L78 Accepts]: Start accepts. Automaton has 460523 states and 746103 transitions. Word has length 142 [2020-12-22 07:45:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:55,846 INFO L481 AbstractCegarLoop]: Abstraction has 460523 states and 746103 transitions. [2020-12-22 07:45:55,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 460523 states and 746103 transitions. [2020-12-22 07:45:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:45:55,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:55,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:55,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:45:55,857 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1189508400, now seen corresponding path program 1 times [2020-12-22 07:45:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:55,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530987662] [2020-12-22 07:45:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:56,109 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 07:45:56,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530987662] [2020-12-22 07:45:56,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:56,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:56,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060459781] [2020-12-22 07:45:56,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:56,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:56,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:56,114 INFO L87 Difference]: Start difference. First operand 460523 states and 746103 transitions. Second operand 4 states. [2020-12-22 07:46:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:18,604 INFO L93 Difference]: Finished difference Result 1368442 states and 2217690 transitions. [2020-12-22 07:46:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:46:18,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:46:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:21,066 INFO L225 Difference]: With dead ends: 1368442 [2020-12-22 07:46:21,066 INFO L226 Difference]: Without dead ends: 907956 [2020-12-22 07:46:21,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:46:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907956 states. [2020-12-22 07:46:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907956 to 907954. [2020-12-22 07:46:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 907954 states. [2020-12-22 07:47:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907954 states to 907954 states and 1464290 transitions. [2020-12-22 07:47:01,714 INFO L78 Accepts]: Start accepts. Automaton has 907954 states and 1464290 transitions. Word has length 143 [2020-12-22 07:47:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:01,717 INFO L481 AbstractCegarLoop]: Abstraction has 907954 states and 1464290 transitions. [2020-12-22 07:47:01,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 907954 states and 1464290 transitions. [2020-12-22 07:47:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:47:01,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:01,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:01,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:47:01,732 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 943648514, now seen corresponding path program 1 times [2020-12-22 07:47:01,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:01,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133205398] [2020-12-22 07:47:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:01,829 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 07:47:01,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133205398] [2020-12-22 07:47:01,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:01,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:47:01,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631068694] [2020-12-22 07:47:01,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:47:01,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:47:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:47:01,835 INFO L87 Difference]: Start difference. First operand 907954 states and 1464290 transitions. Second operand 3 states.