/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem12_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:33:51,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:33:51,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:33:51,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:33:51,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:33:51,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:33:51,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:33:51,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:33:51,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:33:51,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:33:52,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:33:52,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:33:52,001 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:33:52,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:33:52,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:33:52,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:33:52,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:33:52,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:33:52,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:33:52,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:33:52,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:33:52,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:33:52,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:33:52,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:33:52,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:33:52,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:33:52,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:33:52,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:33:52,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:33:52,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:33:52,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:33:52,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:33:52,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:33:52,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:33:52,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:33:52,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:33:52,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:33:52,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:33:52,448 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:33:52,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2020-12-22 01:33:52,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ad9d7b3/2115dd847e774826a8a04938e486740c/FLAGdb8a7ca5b [2020-12-22 01:33:53,582 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:33:53,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2020-12-22 01:33:53,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ad9d7b3/2115dd847e774826a8a04938e486740c/FLAGdb8a7ca5b [2020-12-22 01:33:54,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ad9d7b3/2115dd847e774826a8a04938e486740c [2020-12-22 01:33:54,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:33:54,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:33:54,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:33:54,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:33:54,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:33:54,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:33:54" (1/1) ... [2020-12-22 01:33:54,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efce487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:54, skipping insertion in model container [2020-12-22 01:33:54,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:33:54" (1/1) ... [2020-12-22 01:33:54,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:33:54,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:33:54,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c[6959,6972] [2020-12-22 01:33:55,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:33:55,711 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:33:55,762 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c[6959,6972] [2020-12-22 01:33:56,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:33:56,529 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:33:56,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56 WrapperNode [2020-12-22 01:33:56,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:33:56,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:33:56,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:33:56,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:33:56,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:56,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:33:57,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:33:57,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:33:57,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:33:57,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (1/1) ... [2020-12-22 01:33:57,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:33:57,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:33:57,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:33:57,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:33:57,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (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 01:33:57,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:33:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:33:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:33:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:34:04,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:34:04,147 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:34:04,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:34:04 BoogieIcfgContainer [2020-12-22 01:34:04,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:34:04,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:34:04,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:34:04,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:34:04,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:33:54" (1/3) ... [2020-12-22 01:34:04,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f31e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:34:04, skipping insertion in model container [2020-12-22 01:34:04,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:33:56" (2/3) ... [2020-12-22 01:34:04,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f31e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:34:04, skipping insertion in model container [2020-12-22 01:34:04,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:34:04" (3/3) ... [2020-12-22 01:34:04,174 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label56.c [2020-12-22 01:34:04,183 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:34:04,190 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:34:04,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:34:04,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:34:04,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:34:04,257 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:34:04,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:34:04,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:34:04,257 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:34:04,257 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:34:04,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:34:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2020-12-22 01:34:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 01:34:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:04,358 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] [2020-12-22 01:34:04,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2020-12-22 01:34:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:04,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110044726] [2020-12-22 01:34:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:04,916 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 01:34:04,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110044726] [2020-12-22 01:34:04,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:04,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799470971] [2020-12-22 01:34:04,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:34:04,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:04,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:34:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:34:04,951 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2020-12-22 01:34:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:18,298 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2020-12-22 01:34:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:34:18,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 01:34:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:18,366 INFO L225 Difference]: With dead ends: 3142 [2020-12-22 01:34:18,366 INFO L226 Difference]: Without dead ends: 2257 [2020-12-22 01:34:18,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:34:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2020-12-22 01:34:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2020-12-22 01:34:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-12-22 01:34:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3565 transitions. [2020-12-22 01:34:18,589 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3565 transitions. Word has length 56 [2020-12-22 01:34:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 2257 states and 3565 transitions. [2020-12-22 01:34:18,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:34:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3565 transitions. [2020-12-22 01:34:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 01:34:18,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:18,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:34:18,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:34:18,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash 109536065, now seen corresponding path program 1 times [2020-12-22 01:34:18,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:18,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132259557] [2020-12-22 01:34:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:34:19,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132259557] [2020-12-22 01:34:19,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:19,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:19,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132031031] [2020-12-22 01:34:19,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:34:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:34:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:34:19,158 INFO L87 Difference]: Start difference. First operand 2257 states and 3565 transitions. Second operand 4 states. [2020-12-22 01:34:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:27,992 INFO L93 Difference]: Finished difference Result 5300 states and 9213 transitions. [2020-12-22 01:34:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:34:27,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 01:34:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:28,022 INFO L225 Difference]: With dead ends: 5300 [2020-12-22 01:34:28,023 INFO L226 Difference]: Without dead ends: 3759 [2020-12-22 01:34:28,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 01:34:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2020-12-22 01:34:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2020-12-22 01:34:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2020-12-22 01:34:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5143 transitions. [2020-12-22 01:34:28,145 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5143 transitions. Word has length 127 [2020-12-22 01:34:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 3759 states and 5143 transitions. [2020-12-22 01:34:28,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:34:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5143 transitions. [2020-12-22 01:34:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 01:34:28,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:28,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:34:28,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:34:28,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -885524984, now seen corresponding path program 1 times [2020-12-22 01:34:28,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:28,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555825605] [2020-12-22 01:34:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-22 01:34:28,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555825605] [2020-12-22 01:34:28,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539746996] [2020-12-22 01:34:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:34:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:34:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:34:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 01:34:29,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:34:29,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:34:29,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507973055] [2020-12-22 01:34:29,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:34:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:34:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:34:29,338 INFO L87 Difference]: Start difference. First operand 3759 states and 5143 transitions. Second operand 3 states. [2020-12-22 01:34:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:35,886 INFO L93 Difference]: Finished difference Result 9769 states and 13912 transitions. [2020-12-22 01:34:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:34:35,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2020-12-22 01:34:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:35,930 INFO L225 Difference]: With dead ends: 9769 [2020-12-22 01:34:35,930 INFO L226 Difference]: Without dead ends: 6763 [2020-12-22 01:34:35,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:34:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2020-12-22 01:34:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2020-12-22 01:34:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2020-12-22 01:34:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8705 transitions. [2020-12-22 01:34:36,122 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8705 transitions. Word has length 201 [2020-12-22 01:34:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:36,125 INFO L481 AbstractCegarLoop]: Abstraction has 6763 states and 8705 transitions. [2020-12-22 01:34:36,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:34:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8705 transitions. [2020-12-22 01:34:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-12-22 01:34:36,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:36,140 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:36,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 01:34:36,354 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash -50401375, now seen corresponding path program 1 times [2020-12-22 01:34:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:36,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316617360] [2020-12-22 01:34:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 01:34:36,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316617360] [2020-12-22 01:34:36,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:36,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729872362] [2020-12-22 01:34:36,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:34:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:34:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:34:36,857 INFO L87 Difference]: Start difference. First operand 6763 states and 8705 transitions. Second operand 4 states. [2020-12-22 01:34:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:46,361 INFO L93 Difference]: Finished difference Result 15816 states and 21393 transitions. [2020-12-22 01:34:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:34:46,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 268 [2020-12-22 01:34:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:46,416 INFO L225 Difference]: With dead ends: 15816 [2020-12-22 01:34:46,417 INFO L226 Difference]: Without dead ends: 9769 [2020-12-22 01:34:46,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 01:34:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2020-12-22 01:34:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2020-12-22 01:34:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9767 states. [2020-12-22 01:34:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12432 transitions. [2020-12-22 01:34:46,748 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12432 transitions. Word has length 268 [2020-12-22 01:34:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:46,748 INFO L481 AbstractCegarLoop]: Abstraction has 9767 states and 12432 transitions. [2020-12-22 01:34:46,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:34:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12432 transitions. [2020-12-22 01:34:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 01:34:46,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:46,755 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:46,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:34:46,756 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash 766951624, now seen corresponding path program 1 times [2020-12-22 01:34:46,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:46,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435441957] [2020-12-22 01:34:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-22 01:34:47,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435441957] [2020-12-22 01:34:47,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:47,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534315096] [2020-12-22 01:34:47,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:34:47,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:47,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:34:47,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:47,047 INFO L87 Difference]: Start difference. First operand 9767 states and 12432 transitions. Second operand 3 states. [2020-12-22 01:34:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:55,785 INFO L93 Difference]: Finished difference Result 23287 states and 30484 transitions. [2020-12-22 01:34:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:34:55,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 286 [2020-12-22 01:34:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:55,852 INFO L225 Difference]: With dead ends: 23287 [2020-12-22 01:34:55,853 INFO L226 Difference]: Without dead ends: 14273 [2020-12-22 01:34:55,869 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 01:34:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2020-12-22 01:34:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273. [2020-12-22 01:34:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14273 states. [2020-12-22 01:34:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 17619 transitions. [2020-12-22 01:34:56,215 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 17619 transitions. Word has length 286 [2020-12-22 01:34:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:56,217 INFO L481 AbstractCegarLoop]: Abstraction has 14273 states and 17619 transitions. [2020-12-22 01:34:56,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:34:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 17619 transitions. [2020-12-22 01:34:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-12-22 01:34:56,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:56,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 01:34:56,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:34:56,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 330448957, now seen corresponding path program 1 times [2020-12-22 01:34:56,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:56,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674338123] [2020-12-22 01:34:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 01:34:56,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674338123] [2020-12-22 01:34:56,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:56,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:34:56,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098946959] [2020-12-22 01:34:56,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:34:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:34:56,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:56,754 INFO L87 Difference]: Start difference. First operand 14273 states and 17619 transitions. Second operand 3 states. [2020-12-22 01:35:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:04,519 INFO L93 Difference]: Finished difference Result 39058 states and 48927 transitions. [2020-12-22 01:35:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:35:04,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2020-12-22 01:35:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:04,594 INFO L225 Difference]: With dead ends: 39058 [2020-12-22 01:35:04,594 INFO L226 Difference]: Without dead ends: 25538 [2020-12-22 01:35:04,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:35:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2020-12-22 01:35:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 23285. [2020-12-22 01:35:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23285 states. [2020-12-22 01:35:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 27491 transitions. [2020-12-22 01:35:05,053 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 27491 transitions. Word has length 319 [2020-12-22 01:35:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:35:05,054 INFO L481 AbstractCegarLoop]: Abstraction has 23285 states and 27491 transitions. [2020-12-22 01:35:05,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:35:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 27491 transitions. [2020-12-22 01:35:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-22 01:35:05,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:35:05,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:35:05,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:35:05,068 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:35:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:35:05,081 INFO L82 PathProgramCache]: Analyzing trace with hash -628943112, now seen corresponding path program 1 times [2020-12-22 01:35:05,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:35:05,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887040525] [2020-12-22 01:35:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:35:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:35:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 01:35:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887040525] [2020-12-22 01:35:05,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:35:05,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:35:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398377510] [2020-12-22 01:35:05,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:35:05,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:35:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:35:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:35:05,721 INFO L87 Difference]: Start difference. First operand 23285 states and 27491 transitions. Second operand 3 states. [2020-12-22 01:35:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:14,303 INFO L93 Difference]: Finished difference Result 57082 states and 68684 transitions. [2020-12-22 01:35:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:35:14,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 398 [2020-12-22 01:35:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:14,406 INFO L225 Difference]: With dead ends: 57082 [2020-12-22 01:35:14,407 INFO L226 Difference]: Without dead ends: 34550 [2020-12-22 01:35:14,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 01:35:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2020-12-22 01:35:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32297. [2020-12-22 01:35:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32297 states. [2020-12-22 01:35:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32297 states to 32297 states and 38844 transitions. [2020-12-22 01:35:15,017 INFO L78 Accepts]: Start accepts. Automaton has 32297 states and 38844 transitions. Word has length 398 [2020-12-22 01:35:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:35:15,018 INFO L481 AbstractCegarLoop]: Abstraction has 32297 states and 38844 transitions. [2020-12-22 01:35:15,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:35:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32297 states and 38844 transitions. [2020-12-22 01:35:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-12-22 01:35:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:35:15,027 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:35:15,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:35:15,027 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:35:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:35:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 358989714, now seen corresponding path program 1 times [2020-12-22 01:35:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:35:15,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953733500] [2020-12-22 01:35:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:35:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:35:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-22 01:35:15,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953733500] [2020-12-22 01:35:15,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:35:15,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:35:15,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440322971] [2020-12-22 01:35:15,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:35:15,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:35:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:35:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:35:15,544 INFO L87 Difference]: Start difference. First operand 32297 states and 38844 transitions. Second operand 3 states. [2020-12-22 01:35:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:24,350 INFO L93 Difference]: Finished difference Result 79612 states and 95769 transitions. [2020-12-22 01:35:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:35:24,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2020-12-22 01:35:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:24,444 INFO L225 Difference]: With dead ends: 79612 [2020-12-22 01:35:24,444 INFO L226 Difference]: Without dead ends: 48068 [2020-12-22 01:35:24,478 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 01:35:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2020-12-22 01:35:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 45064. [2020-12-22 01:35:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45064 states. [2020-12-22 01:35:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 53977 transitions. [2020-12-22 01:35:25,241 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 53977 transitions. Word has length 415 [2020-12-22 01:35:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:35:25,242 INFO L481 AbstractCegarLoop]: Abstraction has 45064 states and 53977 transitions. [2020-12-22 01:35:25,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:35:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 53977 transitions. [2020-12-22 01:35:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-12-22 01:35:25,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:35:25,253 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:25,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:35:25,254 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:35:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:35:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1869023228, now seen corresponding path program 1 times [2020-12-22 01:35:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:35:25,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613168480] [2020-12-22 01:35:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:35:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:35:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-12-22 01:35:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613168480] [2020-12-22 01:35:25,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:35:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:35:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626503698] [2020-12-22 01:35:25,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:35:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:35:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:35:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:35:25,672 INFO L87 Difference]: Start difference. First operand 45064 states and 53977 transitions. Second operand 3 states. [2020-12-22 01:35:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:34,152 INFO L93 Difference]: Finished difference Result 90877 states and 108730 transitions. [2020-12-22 01:35:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:35:34,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-12-22 01:35:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:34,252 INFO L225 Difference]: With dead ends: 90877 [2020-12-22 01:35:34,252 INFO L226 Difference]: Without dead ends: 46566 [2020-12-22 01:35:34,287 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 01:35:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46566 states. [2020-12-22 01:35:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46566 to 44313. [2020-12-22 01:35:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44313 states. [2020-12-22 01:35:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44313 states to 44313 states and 51314 transitions. [2020-12-22 01:35:35,222 INFO L78 Accepts]: Start accepts. Automaton has 44313 states and 51314 transitions. Word has length 435 [2020-12-22 01:35:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:35:35,223 INFO L481 AbstractCegarLoop]: Abstraction has 44313 states and 51314 transitions. [2020-12-22 01:35:35,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:35:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44313 states and 51314 transitions. [2020-12-22 01:35:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-12-22 01:35:35,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:35:35,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:35,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:35:35,240 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:35:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:35:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1993257016, now seen corresponding path program 1 times [2020-12-22 01:35:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:35:35,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895185018] [2020-12-22 01:35:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:35:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:35:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-12-22 01:35:35,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895185018] [2020-12-22 01:35:35,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:35:35,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:35:35,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521315611] [2020-12-22 01:35:35,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:35:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:35:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:35:35,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:35:35,984 INFO L87 Difference]: Start difference. First operand 44313 states and 51314 transitions. Second operand 3 states. [2020-12-22 01:35:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:45,802 INFO L93 Difference]: Finished difference Result 91628 states and 105846 transitions. [2020-12-22 01:35:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:35:45,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 448 [2020-12-22 01:35:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:45,860 INFO L225 Difference]: With dead ends: 91628 [2020-12-22 01:35:45,861 INFO L226 Difference]: Without dead ends: 48068 [2020-12-22 01:35:45,888 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 01:35:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2020-12-22 01:35:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 46566. [2020-12-22 01:35:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46566 states. [2020-12-22 01:35:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 53257 transitions. [2020-12-22 01:35:46,655 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 53257 transitions. Word has length 448 [2020-12-22 01:35:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:35:46,656 INFO L481 AbstractCegarLoop]: Abstraction has 46566 states and 53257 transitions. [2020-12-22 01:35:46,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:35:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 53257 transitions. [2020-12-22 01:35:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-12-22 01:35:46,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:35:46,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:46,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:35:46,669 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:35:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:35:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1403660162, now seen corresponding path program 1 times [2020-12-22 01:35:46,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:35:46,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510451523] [2020-12-22 01:35:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:35:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:35:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 01:35:47,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510451523] [2020-12-22 01:35:47,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:35:47,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 01:35:47,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179032840] [2020-12-22 01:35:47,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:35:47,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:35:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:35:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:35:47,659 INFO L87 Difference]: Start difference. First operand 46566 states and 53257 transitions. Second operand 5 states. [2020-12-22 01:35:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:35:59,466 INFO L93 Difference]: Finished difference Result 103166 states and 117407 transitions. [2020-12-22 01:35:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:35:59,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 452 [2020-12-22 01:35:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:35:59,586 INFO L225 Difference]: With dead ends: 103166 [2020-12-22 01:35:59,586 INFO L226 Difference]: Without dead ends: 52847 [2020-12-22 01:35:59,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:35:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52847 states. [2020-12-22 01:36:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52847 to 51823. [2020-12-22 01:36:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51823 states. [2020-12-22 01:36:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 58300 transitions. [2020-12-22 01:36:01,024 INFO L78 Accepts]: Start accepts. Automaton has 51823 states and 58300 transitions. Word has length 452 [2020-12-22 01:36:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:36:01,026 INFO L481 AbstractCegarLoop]: Abstraction has 51823 states and 58300 transitions. [2020-12-22 01:36:01,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:36:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51823 states and 58300 transitions. [2020-12-22 01:36:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-12-22 01:36:01,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:36:01,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:36:01,038 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:36:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:36:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1241713795, now seen corresponding path program 1 times [2020-12-22 01:36:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:36:01,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083620541] [2020-12-22 01:36:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:36:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:36:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 491 proven. 63 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-22 01:36:01,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083620541] [2020-12-22 01:36:01,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216430322] [2020-12-22 01:36:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:36:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:36:01,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:36:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:36:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2020-12-22 01:36:02,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:36:02,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 01:36:02,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638551866] [2020-12-22 01:36:02,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:36:02,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:36:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:36:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:36:02,996 INFO L87 Difference]: Start difference. First operand 51823 states and 58300 transitions. Second operand 3 states. [2020-12-22 01:36:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:36:12,795 INFO L93 Difference]: Finished difference Result 117162 states and 132649 transitions. [2020-12-22 01:36:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:36:12,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 453 [2020-12-22 01:36:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:36:12,882 INFO L225 Difference]: With dead ends: 117162 [2020-12-22 01:36:12,882 INFO L226 Difference]: Without dead ends: 66092 [2020-12-22 01:36:12,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:36:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66092 states. [2020-12-22 01:36:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66092 to 63839. [2020-12-22 01:36:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63839 states. [2020-12-22 01:36:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63839 states to 63839 states and 71636 transitions. [2020-12-22 01:36:14,170 INFO L78 Accepts]: Start accepts. Automaton has 63839 states and 71636 transitions. Word has length 453 [2020-12-22 01:36:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:36:14,171 INFO L481 AbstractCegarLoop]: Abstraction has 63839 states and 71636 transitions. [2020-12-22 01:36:14,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:36:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63839 states and 71636 transitions. [2020-12-22 01:36:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-12-22 01:36:14,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:36:14,183 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:14,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 01:36:14,399 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:36:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:36:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1369224632, now seen corresponding path program 1 times [2020-12-22 01:36:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:36:14,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120006517] [2020-12-22 01:36:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:36:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:36:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-12-22 01:36:14,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120006517] [2020-12-22 01:36:14,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:36:14,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:36:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091671533] [2020-12-22 01:36:14,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:36:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:36:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:36:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:36:14,897 INFO L87 Difference]: Start difference. First operand 63839 states and 71636 transitions. Second operand 3 states. [2020-12-22 01:36:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:36:26,717 INFO L93 Difference]: Finished difference Result 164475 states and 185068 transitions. [2020-12-22 01:36:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:36:26,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 455 [2020-12-22 01:36:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:36:26,875 INFO L225 Difference]: With dead ends: 164475 [2020-12-22 01:36:26,876 INFO L226 Difference]: Without dead ends: 101389 [2020-12-22 01:36:26,913 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 01:36:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101389 states. [2020-12-22 01:36:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101389 to 92377. [2020-12-22 01:36:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92377 states. [2020-12-22 01:36:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92377 states to 92377 states and 101924 transitions. [2020-12-22 01:36:28,668 INFO L78 Accepts]: Start accepts. Automaton has 92377 states and 101924 transitions. Word has length 455 [2020-12-22 01:36:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:36:28,672 INFO L481 AbstractCegarLoop]: Abstraction has 92377 states and 101924 transitions. [2020-12-22 01:36:28,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:36:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 92377 states and 101924 transitions. [2020-12-22 01:36:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-12-22 01:36:28,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:36:28,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:36:28,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:36:28,699 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:36:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:36:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1372100425, now seen corresponding path program 1 times [2020-12-22 01:36:28,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:36:28,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372962475] [2020-12-22 01:36:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:36:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:36:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-22 01:36:29,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372962475] [2020-12-22 01:36:29,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:36:29,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:36:29,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256733112] [2020-12-22 01:36:29,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:36:29,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:36:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:36:29,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:36:29,391 INFO L87 Difference]: Start difference. First operand 92377 states and 101924 transitions. Second operand 3 states. [2020-12-22 01:36:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:36:41,885 INFO L93 Difference]: Finished difference Result 207282 states and 228918 transitions. [2020-12-22 01:36:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:36:41,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-12-22 01:36:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:36:42,103 INFO L225 Difference]: With dead ends: 207282 [2020-12-22 01:36:42,103 INFO L226 Difference]: Without dead ends: 115658 [2020-12-22 01:36:42,172 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 01:36:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115658 states. [2020-12-22 01:36:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115658 to 113405. [2020-12-22 01:36:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113405 states. [2020-12-22 01:36:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113405 states to 113405 states and 123160 transitions. [2020-12-22 01:36:44,384 INFO L78 Accepts]: Start accepts. Automaton has 113405 states and 123160 transitions. Word has length 488 [2020-12-22 01:36:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:36:44,385 INFO L481 AbstractCegarLoop]: Abstraction has 113405 states and 123160 transitions. [2020-12-22 01:36:44,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:36:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 113405 states and 123160 transitions. [2020-12-22 01:36:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-12-22 01:36:44,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:36:44,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:44,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:36:44,402 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:36:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:36:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1512657691, now seen corresponding path program 1 times [2020-12-22 01:36:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:36:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258837899] [2020-12-22 01:36:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:36:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:36:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 660 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-12-22 01:36:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258837899] [2020-12-22 01:36:45,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:36:45,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:36:45,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526791154] [2020-12-22 01:36:45,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:36:45,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:36:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:36:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:36:45,173 INFO L87 Difference]: Start difference. First operand 113405 states and 123160 transitions. Second operand 3 states. [2020-12-22 01:36:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:36:58,304 INFO L93 Difference]: Finished difference Result 227559 states and 247070 transitions. [2020-12-22 01:36:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:36:58,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 569 [2020-12-22 01:36:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:36:58,543 INFO L225 Difference]: With dead ends: 227559 [2020-12-22 01:36:58,543 INFO L226 Difference]: Without dead ends: 114907 [2020-12-22 01:36:58,632 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 01:36:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2020-12-22 01:37:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 108899. [2020-12-22 01:37:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108899 states. [2020-12-22 01:37:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108899 states to 108899 states and 116744 transitions. [2020-12-22 01:37:00,658 INFO L78 Accepts]: Start accepts. Automaton has 108899 states and 116744 transitions. Word has length 569 [2020-12-22 01:37:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:37:00,659 INFO L481 AbstractCegarLoop]: Abstraction has 108899 states and 116744 transitions. [2020-12-22 01:37:00,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:37:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 108899 states and 116744 transitions. [2020-12-22 01:37:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-12-22 01:37:00,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:37:00,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:37:00,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 01:37:00,681 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:37:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:37:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1551399070, now seen corresponding path program 1 times [2020-12-22 01:37:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:37:00,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322913915] [2020-12-22 01:37:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:37:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:37:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-22 01:37:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322913915] [2020-12-22 01:37:01,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:37:01,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:37:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835612084] [2020-12-22 01:37:01,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:37:01,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:37:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:37:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:37:01,819 INFO L87 Difference]: Start difference. First operand 108899 states and 116744 transitions. Second operand 3 states. [2020-12-22 01:37:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:37:16,545 INFO L93 Difference]: Finished difference Result 217045 states and 232730 transitions. [2020-12-22 01:37:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:37:16,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 591 [2020-12-22 01:37:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:37:16,763 INFO L225 Difference]: With dead ends: 217045 [2020-12-22 01:37:16,764 INFO L226 Difference]: Without dead ends: 108899 [2020-12-22 01:37:16,826 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 01:37:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108899 states. [2020-12-22 01:37:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108899 to 103642. [2020-12-22 01:37:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103642 states. [2020-12-22 01:37:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103642 states to 103642 states and 108993 transitions. [2020-12-22 01:37:18,941 INFO L78 Accepts]: Start accepts. Automaton has 103642 states and 108993 transitions. Word has length 591 [2020-12-22 01:37:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:37:18,942 INFO L481 AbstractCegarLoop]: Abstraction has 103642 states and 108993 transitions. [2020-12-22 01:37:18,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:37:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 103642 states and 108993 transitions. [2020-12-22 01:37:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2020-12-22 01:37:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:37:18,990 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:37:18,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 01:37:18,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:37:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:37:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash -20987951, now seen corresponding path program 1 times [2020-12-22 01:37:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:37:18,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965151144] [2020-12-22 01:37:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:37:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:37:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2020-12-22 01:37:19,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965151144] [2020-12-22 01:37:19,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:37:19,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:37:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480438340] [2020-12-22 01:37:19,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:37:19,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:37:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:37:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:37:19,841 INFO L87 Difference]: Start difference. First operand 103642 states and 108993 transitions. Second operand 3 states. [2020-12-22 01:37:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:37:35,383 INFO L93 Difference]: Finished difference Result 224555 states and 235824 transitions. [2020-12-22 01:37:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:37:35,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 678 [2020-12-22 01:37:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:37:35,553 INFO L225 Difference]: With dead ends: 224555 [2020-12-22 01:37:35,553 INFO L226 Difference]: Without dead ends: 121666 [2020-12-22 01:37:35,871 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 01:37:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121666 states. [2020-12-22 01:37:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121666 to 111152. [2020-12-22 01:37:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111152 states. [2020-12-22 01:37:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111152 states to 111152 states and 116441 transitions. [2020-12-22 01:37:37,599 INFO L78 Accepts]: Start accepts. Automaton has 111152 states and 116441 transitions. Word has length 678 [2020-12-22 01:37:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:37:37,600 INFO L481 AbstractCegarLoop]: Abstraction has 111152 states and 116441 transitions. [2020-12-22 01:37:37,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:37:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 111152 states and 116441 transitions. [2020-12-22 01:37:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2020-12-22 01:37:37,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:37:37,631 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:37:37,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 01:37:37,631 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:37:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:37:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1209799229, now seen corresponding path program 1 times [2020-12-22 01:37:37,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:37:37,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894850280] [2020-12-22 01:37:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:37:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:37:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-12-22 01:37:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894850280] [2020-12-22 01:37:38,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:37:38,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:37:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350930293] [2020-12-22 01:37:38,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:37:38,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:37:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:37:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:37:38,869 INFO L87 Difference]: Start difference. First operand 111152 states and 116441 transitions. Second operand 3 states.