/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/Problem13_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:43:36,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:43:36,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:43:36,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:43:36,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:43:36,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:43:36,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:43:36,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:43:36,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:43:36,392 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:43:36,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:43:36,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:43:36,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:43:36,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:43:36,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:43:36,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:43:36,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:43:36,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:43:36,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:43:36,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:43:36,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:43:36,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:43:36,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:43:36,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:43:36,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:43:36,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:43:36,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:43:36,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:43:36,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:43:36,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:43:36,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:43:36,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:43:37,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:43:37,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:43:37,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:43:37,028 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:43:37,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2020-12-22 01:43:37,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8311f64b4/e9d1396c04c24d63b5b8c4179e5fc4c6/FLAG5d1d506f4 [2020-12-22 01:43:38,504 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:43:38,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2020-12-22 01:43:38,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8311f64b4/e9d1396c04c24d63b5b8c4179e5fc4c6/FLAG5d1d506f4 [2020-12-22 01:43:38,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8311f64b4/e9d1396c04c24d63b5b8c4179e5fc4c6 [2020-12-22 01:43:38,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:43:38,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:43:38,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:43:38,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:43:38,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:43:38,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:43:38" (1/1) ... [2020-12-22 01:43:38,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a9ca2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:38, skipping insertion in model container [2020-12-22 01:43:38,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:43:38" (1/1) ... [2020-12-22 01:43:38,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:43:39,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:43:39,415 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/Problem13_label31.c[5792,5805] [2020-12-22 01:43:41,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:43:41,031 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:43:41,087 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/Problem13_label31.c[5792,5805] [2020-12-22 01:43:41,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:43:41,896 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:43:41,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41 WrapperNode [2020-12-22 01:43:41,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:43:41,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:43:41,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:43:41,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:43:41,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:42,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:42,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:43:42,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:43:42,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:43:42,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:43:42,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:42,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (1/1) ... [2020-12-22 01:43:43,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:43:43,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:43:43,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:43:43,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:43:43,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (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 01:43:44,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:43:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:43:44,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:43:44,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:43:51,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:43:51,646 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:43:51,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:43:51 BoogieIcfgContainer [2020-12-22 01:43:51,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:43:51,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:43:51,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:43:51,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:43:51,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:43:38" (1/3) ... [2020-12-22 01:43:51,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11241b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:43:51, skipping insertion in model container [2020-12-22 01:43:51,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:41" (2/3) ... [2020-12-22 01:43:51,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11241b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:43:51, skipping insertion in model container [2020-12-22 01:43:51,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:43:51" (3/3) ... [2020-12-22 01:43:51,665 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label31.c [2020-12-22 01:43:51,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:43:51,685 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:43:51,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:43:51,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:43:51,767 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:43:51,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:43:51,767 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:43:51,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:43:51,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:43:51,768 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:43:51,768 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:43:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:43:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 01:43:51,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:51,908 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] [2020-12-22 01:43:51,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2102454322, now seen corresponding path program 1 times [2020-12-22 01:43:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:51,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936475159] [2020-12-22 01:43:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:52,521 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 01:43:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936475159] [2020-12-22 01:43:52,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:52,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:43:52,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307253777] [2020-12-22 01:43:52,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:52,572 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 3 states. [2020-12-22 01:44:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:00,404 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2020-12-22 01:44:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:00,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 01:44:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:00,448 INFO L225 Difference]: With dead ends: 3035 [2020-12-22 01:44:00,449 INFO L226 Difference]: Without dead ends: 1873 [2020-12-22 01:44:00,462 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 01:44:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-12-22 01:44:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2020-12-22 01:44:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1859 states. [2020-12-22 01:44:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2020-12-22 01:44:00,665 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 40 [2020-12-22 01:44:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:00,668 INFO L481 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2020-12-22 01:44:00,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2020-12-22 01:44:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 01:44:00,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:00,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:00,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:44:00,681 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash -329948995, now seen corresponding path program 1 times [2020-12-22 01:44:00,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:00,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919522970] [2020-12-22 01:44:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:00,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919522970] [2020-12-22 01:44:00,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:00,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:00,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527487651] [2020-12-22 01:44:00,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:01,001 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand 3 states. [2020-12-22 01:44:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:09,039 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2020-12-22 01:44:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:09,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 01:44:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:09,063 INFO L225 Difference]: With dead ends: 5317 [2020-12-22 01:44:09,063 INFO L226 Difference]: Without dead ends: 3460 [2020-12-22 01:44:09,069 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 01:44:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-12-22 01:44:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2020-12-22 01:44:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3459 states. [2020-12-22 01:44:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2020-12-22 01:44:09,172 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 112 [2020-12-22 01:44:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:09,172 INFO L481 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2020-12-22 01:44:09,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2020-12-22 01:44:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 01:44:09,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:09,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:09,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:44:09,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash -933684044, now seen corresponding path program 1 times [2020-12-22 01:44:09,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:09,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298573319] [2020-12-22 01:44:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298573319] [2020-12-22 01:44:09,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:09,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:09,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375358819] [2020-12-22 01:44:09,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:09,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:09,375 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand 3 states. [2020-12-22 01:44:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:17,010 INFO L93 Difference]: Finished difference Result 10095 states and 13939 transitions. [2020-12-22 01:44:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:17,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2020-12-22 01:44:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:17,056 INFO L225 Difference]: With dead ends: 10095 [2020-12-22 01:44:17,056 INFO L226 Difference]: Without dead ends: 6638 [2020-12-22 01:44:17,065 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 01:44:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2020-12-22 01:44:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 6631. [2020-12-22 01:44:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6631 states. [2020-12-22 01:44:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6631 states to 6631 states and 8435 transitions. [2020-12-22 01:44:17,267 INFO L78 Accepts]: Start accepts. Automaton has 6631 states and 8435 transitions. Word has length 126 [2020-12-22 01:44:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:17,267 INFO L481 AbstractCegarLoop]: Abstraction has 6631 states and 8435 transitions. [2020-12-22 01:44:17,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6631 states and 8435 transitions. [2020-12-22 01:44:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 01:44:17,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:17,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:17,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:44:17,278 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -5348514, now seen corresponding path program 1 times [2020-12-22 01:44:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:17,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142613015] [2020-12-22 01:44:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142613015] [2020-12-22 01:44:17,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:17,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:17,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760559083] [2020-12-22 01:44:17,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:17,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:17,646 INFO L87 Difference]: Start difference. First operand 6631 states and 8435 transitions. Second operand 3 states. [2020-12-22 01:44:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:25,393 INFO L93 Difference]: Finished difference Result 14047 states and 17670 transitions. [2020-12-22 01:44:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:25,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 01:44:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:25,437 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 01:44:25,438 INFO L226 Difference]: Without dead ends: 7418 [2020-12-22 01:44:25,451 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 01:44:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2020-12-22 01:44:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 7418. [2020-12-22 01:44:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7418 states. [2020-12-22 01:44:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7418 states to 7418 states and 9227 transitions. [2020-12-22 01:44:25,644 INFO L78 Accepts]: Start accepts. Automaton has 7418 states and 9227 transitions. Word has length 129 [2020-12-22 01:44:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:25,645 INFO L481 AbstractCegarLoop]: Abstraction has 7418 states and 9227 transitions. [2020-12-22 01:44:25,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7418 states and 9227 transitions. [2020-12-22 01:44:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 01:44:25,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:25,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:25,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:44:25,648 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash -435026765, now seen corresponding path program 1 times [2020-12-22 01:44:25,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:25,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045002616] [2020-12-22 01:44:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:25,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045002616] [2020-12-22 01:44:25,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:25,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:25,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676979777] [2020-12-22 01:44:25,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:25,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:25,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:25,888 INFO L87 Difference]: Start difference. First operand 7418 states and 9227 transitions. Second operand 3 states. [2020-12-22 01:44:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:34,330 INFO L93 Difference]: Finished difference Result 17212 states and 22196 transitions. [2020-12-22 01:44:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:34,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 01:44:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:34,395 INFO L225 Difference]: With dead ends: 17212 [2020-12-22 01:44:34,396 INFO L226 Difference]: Without dead ends: 10583 [2020-12-22 01:44:34,410 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 01:44:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2020-12-22 01:44:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10574. [2020-12-22 01:44:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10574 states. [2020-12-22 01:44:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10574 states to 10574 states and 12983 transitions. [2020-12-22 01:44:34,701 INFO L78 Accepts]: Start accepts. Automaton has 10574 states and 12983 transitions. Word has length 136 [2020-12-22 01:44:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:34,702 INFO L481 AbstractCegarLoop]: Abstraction has 10574 states and 12983 transitions. [2020-12-22 01:44:34,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10574 states and 12983 transitions. [2020-12-22 01:44:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 01:44:34,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:34,707 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:44:34,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:44:34,707 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:34,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1382232573, now seen corresponding path program 1 times [2020-12-22 01:44:34,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:34,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950470111] [2020-12-22 01:44:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-12-22 01:44:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950470111] [2020-12-22 01:44:34,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:34,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:34,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966902062] [2020-12-22 01:44:34,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:34,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:34,977 INFO L87 Difference]: Start difference. First operand 10574 states and 12983 transitions. Second operand 3 states. [2020-12-22 01:44:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:45,424 INFO L93 Difference]: Finished difference Result 23531 states and 29718 transitions. [2020-12-22 01:44:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:45,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 01:44:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:45,461 INFO L225 Difference]: With dead ends: 23531 [2020-12-22 01:44:45,462 INFO L226 Difference]: Without dead ends: 13746 [2020-12-22 01:44:45,472 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 01:44:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2020-12-22 01:44:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 13735. [2020-12-22 01:44:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13735 states. [2020-12-22 01:44:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13735 states to 13735 states and 17022 transitions. [2020-12-22 01:44:45,762 INFO L78 Accepts]: Start accepts. Automaton has 13735 states and 17022 transitions. Word has length 225 [2020-12-22 01:44:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:45,763 INFO L481 AbstractCegarLoop]: Abstraction has 13735 states and 17022 transitions. [2020-12-22 01:44:45,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 13735 states and 17022 transitions. [2020-12-22 01:44:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-22 01:44:45,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:45,773 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:44:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:44:45,774 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1177889492, now seen corresponding path program 1 times [2020-12-22 01:44:45,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:45,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403316259] [2020-12-22 01:44:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:46,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403316259] [2020-12-22 01:44:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:46,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:46,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399883462] [2020-12-22 01:44:46,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:46,326 INFO L87 Difference]: Start difference. First operand 13735 states and 17022 transitions. Second operand 3 states. [2020-12-22 01:44:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:55,454 INFO L93 Difference]: Finished difference Result 26704 states and 33292 transitions. [2020-12-22 01:44:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:55,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2020-12-22 01:44:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:55,502 INFO L225 Difference]: With dead ends: 26704 [2020-12-22 01:44:55,502 INFO L226 Difference]: Without dead ends: 13758 [2020-12-22 01:44:55,519 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 01:44:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13758 states. [2020-12-22 01:44:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13758 to 13736. [2020-12-22 01:44:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13736 states. [2020-12-22 01:44:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13736 states to 13736 states and 16803 transitions. [2020-12-22 01:44:55,795 INFO L78 Accepts]: Start accepts. Automaton has 13736 states and 16803 transitions. Word has length 302 [2020-12-22 01:44:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:55,796 INFO L481 AbstractCegarLoop]: Abstraction has 13736 states and 16803 transitions. [2020-12-22 01:44:55,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 13736 states and 16803 transitions. [2020-12-22 01:44:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 01:44:55,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:55,806 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:55,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:44:55,807 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:55,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1175900880, now seen corresponding path program 1 times [2020-12-22 01:44:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:55,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560667289] [2020-12-22 01:44:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:44:56,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560667289] [2020-12-22 01:44:56,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:56,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:56,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871338985] [2020-12-22 01:44:56,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:56,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:56,184 INFO L87 Difference]: Start difference. First operand 13736 states and 16803 transitions. Second operand 3 states. [2020-12-22 01:45:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:08,432 INFO L93 Difference]: Finished difference Result 29837 states and 37336 transitions. [2020-12-22 01:45:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:08,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-12-22 01:45:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:08,473 INFO L225 Difference]: With dead ends: 29837 [2020-12-22 01:45:08,473 INFO L226 Difference]: Without dead ends: 16890 [2020-12-22 01:45:08,486 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 01:45:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16890 states. [2020-12-22 01:45:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16890 to 16886. [2020-12-22 01:45:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16886 states. [2020-12-22 01:45:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16886 states to 16886 states and 20296 transitions. [2020-12-22 01:45:08,724 INFO L78 Accepts]: Start accepts. Automaton has 16886 states and 20296 transitions. Word has length 328 [2020-12-22 01:45:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 16886 states and 20296 transitions. [2020-12-22 01:45:08,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16886 states and 20296 transitions. [2020-12-22 01:45:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-12-22 01:45:08,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:08,735 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:08,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:45:08,735 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:08,736 INFO L82 PathProgramCache]: Analyzing trace with hash -433487939, now seen corresponding path program 1 times [2020-12-22 01:45:08,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:08,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984360306] [2020-12-22 01:45:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:45:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984360306] [2020-12-22 01:45:09,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:09,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:09,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057993078] [2020-12-22 01:45:09,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:09,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:09,058 INFO L87 Difference]: Start difference. First operand 16886 states and 20296 transitions. Second operand 3 states. [2020-12-22 01:45:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:18,415 INFO L93 Difference]: Finished difference Result 32981 states and 39797 transitions. [2020-12-22 01:45:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:18,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 356 [2020-12-22 01:45:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:18,456 INFO L225 Difference]: With dead ends: 32981 [2020-12-22 01:45:18,457 INFO L226 Difference]: Without dead ends: 16884 [2020-12-22 01:45:18,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16884 states. [2020-12-22 01:45:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16884 to 16883. [2020-12-22 01:45:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16883 states. [2020-12-22 01:45:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16883 states to 16883 states and 19588 transitions. [2020-12-22 01:45:18,790 INFO L78 Accepts]: Start accepts. Automaton has 16883 states and 19588 transitions. Word has length 356 [2020-12-22 01:45:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:18,791 INFO L481 AbstractCegarLoop]: Abstraction has 16883 states and 19588 transitions. [2020-12-22 01:45:18,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 16883 states and 19588 transitions. [2020-12-22 01:45:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-12-22 01:45:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:18,812 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:45:18,812 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1067621870, now seen corresponding path program 1 times [2020-12-22 01:45:18,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:18,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123863183] [2020-12-22 01:45:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:45:19,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123863183] [2020-12-22 01:45:19,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:19,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162617519] [2020-12-22 01:45:19,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:19,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:19,247 INFO L87 Difference]: Start difference. First operand 16883 states and 19588 transitions. Second operand 3 states. [2020-12-22 01:45:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:29,380 INFO L93 Difference]: Finished difference Result 48709 states and 56707 transitions. [2020-12-22 01:45:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:29,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 433 [2020-12-22 01:45:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:29,444 INFO L225 Difference]: With dead ends: 48709 [2020-12-22 01:45:29,444 INFO L226 Difference]: Without dead ends: 31824 [2020-12-22 01:45:29,465 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 01:45:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31824 states. [2020-12-22 01:45:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31824 to 29460. [2020-12-22 01:45:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29460 states. [2020-12-22 01:45:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29460 states to 29460 states and 33400 transitions. [2020-12-22 01:45:29,894 INFO L78 Accepts]: Start accepts. Automaton has 29460 states and 33400 transitions. Word has length 433 [2020-12-22 01:45:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:29,895 INFO L481 AbstractCegarLoop]: Abstraction has 29460 states and 33400 transitions. [2020-12-22 01:45:29,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29460 states and 33400 transitions. [2020-12-22 01:45:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-12-22 01:45:29,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:29,916 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:29,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:45:29,917 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2119165798, now seen corresponding path program 1 times [2020-12-22 01:45:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599924308] [2020-12-22 01:45:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 01:45:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599924308] [2020-12-22 01:45:30,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:30,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:30,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138504934] [2020-12-22 01:45:30,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:45:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:45:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:45:30,575 INFO L87 Difference]: Start difference. First operand 29460 states and 33400 transitions. Second operand 4 states. [2020-12-22 01:45:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:44,381 INFO L93 Difference]: Finished difference Result 62854 states and 70995 transitions. [2020-12-22 01:45:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:45:44,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-12-22 01:45:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:44,418 INFO L225 Difference]: With dead ends: 62854 [2020-12-22 01:45:44,418 INFO L226 Difference]: Without dead ends: 33391 [2020-12-22 01:45:44,438 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 01:45:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33391 states. [2020-12-22 01:45:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33391 to 32603. [2020-12-22 01:45:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32603 states. [2020-12-22 01:45:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32603 states to 32603 states and 36372 transitions. [2020-12-22 01:45:44,858 INFO L78 Accepts]: Start accepts. Automaton has 32603 states and 36372 transitions. Word has length 480 [2020-12-22 01:45:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:44,859 INFO L481 AbstractCegarLoop]: Abstraction has 32603 states and 36372 transitions. [2020-12-22 01:45:44,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:45:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32603 states and 36372 transitions. [2020-12-22 01:45:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-12-22 01:45:44,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:44,874 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:44,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:45:44,875 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1889758981, now seen corresponding path program 1 times [2020-12-22 01:45:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:44,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069754124] [2020-12-22 01:45:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:45:45,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069754124] [2020-12-22 01:45:45,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:45,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:45:45,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104960047] [2020-12-22 01:45:45,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:45:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:45:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:45:45,322 INFO L87 Difference]: Start difference. First operand 32603 states and 36372 transitions. Second operand 4 states. [2020-12-22 01:46:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:10,857 INFO L93 Difference]: Finished difference Result 121261 states and 135909 transitions. [2020-12-22 01:46:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:46:10,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-12-22 01:46:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:11,037 INFO L225 Difference]: With dead ends: 121261 [2020-12-22 01:46:11,037 INFO L226 Difference]: Without dead ends: 89447 [2020-12-22 01:46:11,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:46:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89447 states. [2020-12-22 01:46:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89447 to 85375. [2020-12-22 01:46:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85375 states. [2020-12-22 01:46:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85375 states to 85375 states and 94792 transitions. [2020-12-22 01:46:12,803 INFO L78 Accepts]: Start accepts. Automaton has 85375 states and 94792 transitions. Word has length 486 [2020-12-22 01:46:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:12,804 INFO L481 AbstractCegarLoop]: Abstraction has 85375 states and 94792 transitions. [2020-12-22 01:46:12,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:46:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 85375 states and 94792 transitions. [2020-12-22 01:46:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2020-12-22 01:46:12,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:12,859 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:12,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:46:12,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:12,863 INFO L82 PathProgramCache]: Analyzing trace with hash -672165830, now seen corresponding path program 1 times [2020-12-22 01:46:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:12,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985841962] [2020-12-22 01:46:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-22 01:46:13,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985841962] [2020-12-22 01:46:13,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:13,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:46:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398326371] [2020-12-22 01:46:13,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:46:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:46:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:46:13,466 INFO L87 Difference]: Start difference. First operand 85375 states and 94792 transitions. Second operand 4 states. [2020-12-22 01:46:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:43,351 INFO L93 Difference]: Finished difference Result 232338 states and 257204 transitions. [2020-12-22 01:46:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:46:43,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 522 [2020-12-22 01:46:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:43,608 INFO L225 Difference]: With dead ends: 232338 [2020-12-22 01:46:43,608 INFO L226 Difference]: Without dead ends: 147752 [2020-12-22 01:46:43,683 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 01:46:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147752 states. [2020-12-22 01:46:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147752 to 146046. [2020-12-22 01:46:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146046 states. [2020-12-22 01:46:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146046 states to 146046 states and 160971 transitions. [2020-12-22 01:46:47,004 INFO L78 Accepts]: Start accepts. Automaton has 146046 states and 160971 transitions. Word has length 522 [2020-12-22 01:46:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:47,007 INFO L481 AbstractCegarLoop]: Abstraction has 146046 states and 160971 transitions. [2020-12-22 01:46:47,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:46:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 146046 states and 160971 transitions. [2020-12-22 01:46:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-12-22 01:46:47,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:47,036 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:47,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:46:47,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2090914128, now seen corresponding path program 1 times [2020-12-22 01:46:47,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:47,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157209756] [2020-12-22 01:46:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-22 01:46:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157209756] [2020-12-22 01:46:48,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:48,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:46:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941158327] [2020-12-22 01:46:48,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:46:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:46:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:48,271 INFO L87 Difference]: Start difference. First operand 146046 states and 160971 transitions. Second operand 3 states. [2020-12-22 01:47:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:47:07,594 INFO L93 Difference]: Finished difference Result 368462 states and 406497 transitions. [2020-12-22 01:47:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:47:07,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 527 [2020-12-22 01:47:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:47:08,017 INFO L225 Difference]: With dead ends: 368462 [2020-12-22 01:47:08,018 INFO L226 Difference]: Without dead ends: 223205 [2020-12-22 01:47:08,385 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 01:47:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223205 states. [2020-12-22 01:47:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223205 to 210599. [2020-12-22 01:47:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210599 states. [2020-12-22 01:47:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210599 states to 210599 states and 230721 transitions. [2020-12-22 01:47:12,150 INFO L78 Accepts]: Start accepts. Automaton has 210599 states and 230721 transitions. Word has length 527 [2020-12-22 01:47:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:47:12,151 INFO L481 AbstractCegarLoop]: Abstraction has 210599 states and 230721 transitions. [2020-12-22 01:47:12,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:47:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 210599 states and 230721 transitions. [2020-12-22 01:47:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-12-22 01:47:12,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:47:12,193 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:47:12,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:47:12,194 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:47:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:47:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1750994002, now seen corresponding path program 1 times [2020-12-22 01:47:12,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:47:12,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975398320] [2020-12-22 01:47:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:47:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 411 proven. 50 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 01:47:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975398320] [2020-12-22 01:47:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198539986] [2020-12-22 01:47:13,355 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 01:47:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:47:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:47:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 594 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-12-22 01:47:17,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:47:17,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:47:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850188423] [2020-12-22 01:47:17,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:47:17,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:47:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:47:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:47:17,029 INFO L87 Difference]: Start difference. First operand 210599 states and 230721 transitions. Second operand 3 states.