/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem16_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:19:36,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:19:36,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:19:36,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:19:36,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:19:36,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:19:36,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:19:36,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:19:36,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:19:36,822 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:19:36,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:19:36,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:19:36,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:19:36,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:19:36,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:19:36,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:19:36,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:19:36,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:19:36,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:19:36,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:19:36,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:19:36,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:19:36,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:19:36,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:19:36,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:19:36,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:19:36,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:19:36,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:19:36,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:19:36,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:19:36,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:19:37,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:19:37,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:19:37,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:19:37,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:19:37,273 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:19:37,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label52.c [2020-12-22 02:19:37,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ada8fa/f8325780e9914540911ca2f84e7cf3fb/FLAG75be186ea [2020-12-22 02:19:38,297 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:19:38,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label52.c [2020-12-22 02:19:38,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ada8fa/f8325780e9914540911ca2f84e7cf3fb/FLAG75be186ea [2020-12-22 02:19:38,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ada8fa/f8325780e9914540911ca2f84e7cf3fb [2020-12-22 02:19:38,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:19:38,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:19:38,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:19:38,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:19:38,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:19:38,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:19:38" (1/1) ... [2020-12-22 02:19:38,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf9d6c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:38, skipping insertion in model container [2020-12-22 02:19:38,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:19:38" (1/1) ... [2020-12-22 02:19:38,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:19:38,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:19:38,713 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label52.c[3233,3246] [2020-12-22 02:19:39,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:19:39,362 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:19:39,401 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label52.c[3233,3246] [2020-12-22 02:19:39,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:19:39,629 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:19:39,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39 WrapperNode [2020-12-22 02:19:39,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:19:39,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:19:39,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:19:39,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:19:39,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:19:39,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:19:39,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:19:39,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:19:39,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:39,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... [2020-12-22 02:19:40,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:19:40,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:19:40,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:19:40,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:19:40,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:19:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:19:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:19:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:19:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:19:42,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:19:42,642 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:19:42,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:19:42 BoogieIcfgContainer [2020-12-22 02:19:42,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:19:42,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:19:42,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:19:42,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:19:42,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:19:38" (1/3) ... [2020-12-22 02:19:42,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ab6734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:19:42, skipping insertion in model container [2020-12-22 02:19:42,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:39" (2/3) ... [2020-12-22 02:19:42,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ab6734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:19:42, skipping insertion in model container [2020-12-22 02:19:42,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:19:42" (3/3) ... [2020-12-22 02:19:42,661 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label52.c [2020-12-22 02:19:42,669 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:19:42,676 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:19:42,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:19:42,761 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:19:42,761 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:19:42,761 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:19:42,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:19:42,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:19:42,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:19:42,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:19:42,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:19:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2020-12-22 02:19:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 02:19:42,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:42,808 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] [2020-12-22 02:19:42,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash -748286455, now seen corresponding path program 1 times [2020-12-22 02:19:42,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:42,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33971338] [2020-12-22 02:19:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:19:43,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33971338] [2020-12-22 02:19:43,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:43,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:19:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321695807] [2020-12-22 02:19:43,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:43,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:43,172 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 3 states. [2020-12-22 02:19:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:45,705 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2020-12-22 02:19:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:45,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-22 02:19:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:45,735 INFO L225 Difference]: With dead ends: 1122 [2020-12-22 02:19:45,735 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 02:19:45,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 02:19:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2020-12-22 02:19:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-12-22 02:19:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2020-12-22 02:19:45,840 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 29 [2020-12-22 02:19:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:45,841 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2020-12-22 02:19:45,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2020-12-22 02:19:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 02:19:45,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:45,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:45,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:19:45,846 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1389394770, now seen corresponding path program 1 times [2020-12-22 02:19:45,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:45,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491362795] [2020-12-22 02:19:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:19:46,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491362795] [2020-12-22 02:19:46,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:46,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:19:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454109725] [2020-12-22 02:19:46,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:46,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:46,081 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand 3 states. [2020-12-22 02:19:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:48,574 INFO L93 Difference]: Finished difference Result 1982 states and 3008 transitions. [2020-12-22 02:19:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:48,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 02:19:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:48,585 INFO L225 Difference]: With dead ends: 1982 [2020-12-22 02:19:48,585 INFO L226 Difference]: Without dead ends: 1322 [2020-12-22 02:19:48,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-12-22 02:19:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-12-22 02:19:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-12-22 02:19:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1921 transitions. [2020-12-22 02:19:48,677 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1921 transitions. Word has length 97 [2020-12-22 02:19:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:48,677 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 1921 transitions. [2020-12-22 02:19:48,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1921 transitions. [2020-12-22 02:19:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 02:19:48,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:48,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:48,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:19:48,682 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1971398649, now seen corresponding path program 1 times [2020-12-22 02:19:48,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:48,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683431468] [2020-12-22 02:19:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:19:48,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683431468] [2020-12-22 02:19:48,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:48,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:48,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134642121] [2020-12-22 02:19:48,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:19:48,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:19:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:19:48,937 INFO L87 Difference]: Start difference. First operand 1320 states and 1921 transitions. Second operand 4 states. [2020-12-22 02:19:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:52,503 INFO L93 Difference]: Finished difference Result 4283 states and 6147 transitions. [2020-12-22 02:19:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:19:52,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-12-22 02:19:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:52,527 INFO L225 Difference]: With dead ends: 4283 [2020-12-22 02:19:52,527 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 02:19:52,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:19:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 02:19:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2020-12-22 02:19:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-12-22 02:19:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4054 transitions. [2020-12-22 02:19:52,622 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4054 transitions. Word has length 108 [2020-12-22 02:19:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:52,631 INFO L481 AbstractCegarLoop]: Abstraction has 2965 states and 4054 transitions. [2020-12-22 02:19:52,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:19:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4054 transitions. [2020-12-22 02:19:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 02:19:52,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:52,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:52,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:19:52,647 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:52,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1567964617, now seen corresponding path program 1 times [2020-12-22 02:19:52,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:52,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338247172] [2020-12-22 02:19:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:19:52,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338247172] [2020-12-22 02:19:52,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:52,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:19:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177547398] [2020-12-22 02:19:52,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:52,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:52,953 INFO L87 Difference]: Start difference. First operand 2965 states and 4054 transitions. Second operand 3 states. [2020-12-22 02:19:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:55,199 INFO L93 Difference]: Finished difference Result 6915 states and 9557 transitions. [2020-12-22 02:19:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:55,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 02:19:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:55,223 INFO L225 Difference]: With dead ends: 6915 [2020-12-22 02:19:55,223 INFO L226 Difference]: Without dead ends: 4281 [2020-12-22 02:19:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2020-12-22 02:19:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2020-12-22 02:19:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2020-12-22 02:19:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5588 transitions. [2020-12-22 02:19:55,327 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5588 transitions. Word has length 160 [2020-12-22 02:19:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:55,328 INFO L481 AbstractCegarLoop]: Abstraction has 4281 states and 5588 transitions. [2020-12-22 02:19:55,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5588 transitions. [2020-12-22 02:19:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-22 02:19:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:55,332 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:55,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:19:55,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1941185333, now seen corresponding path program 1 times [2020-12-22 02:19:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:55,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051413000] [2020-12-22 02:19:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 02:19:55,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051413000] [2020-12-22 02:19:55,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:55,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:19:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999425768] [2020-12-22 02:19:55,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:55,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:55,547 INFO L87 Difference]: Start difference. First operand 4281 states and 5588 transitions. Second operand 3 states. [2020-12-22 02:19:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:57,750 INFO L93 Difference]: Finished difference Result 10534 states and 13926 transitions. [2020-12-22 02:19:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:57,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 195 [2020-12-22 02:19:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:57,784 INFO L225 Difference]: With dead ends: 10534 [2020-12-22 02:19:57,785 INFO L226 Difference]: Without dead ends: 6584 [2020-12-22 02:19:57,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2020-12-22 02:19:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 5597. [2020-12-22 02:19:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5597 states. [2020-12-22 02:19:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 6810 transitions. [2020-12-22 02:19:57,944 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 6810 transitions. Word has length 195 [2020-12-22 02:19:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:57,946 INFO L481 AbstractCegarLoop]: Abstraction has 5597 states and 6810 transitions. [2020-12-22 02:19:57,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 6810 transitions. [2020-12-22 02:19:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-22 02:19:57,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:57,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:57,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:19:57,952 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1793431885, now seen corresponding path program 1 times [2020-12-22 02:19:57,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:57,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606763607] [2020-12-22 02:19:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:19:58,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606763607] [2020-12-22 02:19:58,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:58,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332253285] [2020-12-22 02:19:58,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:58,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:58,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:58,274 INFO L87 Difference]: Start difference. First operand 5597 states and 6810 transitions. Second operand 3 states. [2020-12-22 02:20:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:00,760 INFO L93 Difference]: Finished difference Result 13166 states and 16415 transitions. [2020-12-22 02:20:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:00,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2020-12-22 02:20:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:00,803 INFO L225 Difference]: With dead ends: 13166 [2020-12-22 02:20:00,803 INFO L226 Difference]: Without dead ends: 7900 [2020-12-22 02:20:00,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2020-12-22 02:20:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7900. [2020-12-22 02:20:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2020-12-22 02:20:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 9341 transitions. [2020-12-22 02:20:00,995 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 9341 transitions. Word has length 264 [2020-12-22 02:20:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:00,996 INFO L481 AbstractCegarLoop]: Abstraction has 7900 states and 9341 transitions. [2020-12-22 02:20:00,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 9341 transitions. [2020-12-22 02:20:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-12-22 02:20:01,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:01,004 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:20:01,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:20:01,005 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1288445364, now seen corresponding path program 1 times [2020-12-22 02:20:01,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:01,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27705146] [2020-12-22 02:20:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:20:01,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27705146] [2020-12-22 02:20:01,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:01,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 02:20:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393223017] [2020-12-22 02:20:01,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:20:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:20:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:01,662 INFO L87 Difference]: Start difference. First operand 7900 states and 9341 transitions. Second operand 7 states. [2020-12-22 02:20:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:04,738 INFO L93 Difference]: Finished difference Result 15328 states and 18192 transitions. [2020-12-22 02:20:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:20:04,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 361 [2020-12-22 02:20:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:04,783 INFO L225 Difference]: With dead ends: 15328 [2020-12-22 02:20:04,783 INFO L226 Difference]: Without dead ends: 7571 [2020-12-22 02:20:04,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2020-12-22 02:20:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2020-12-22 02:20:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2020-12-22 02:20:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 8166 transitions. [2020-12-22 02:20:04,955 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 8166 transitions. Word has length 361 [2020-12-22 02:20:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:04,955 INFO L481 AbstractCegarLoop]: Abstraction has 7571 states and 8166 transitions. [2020-12-22 02:20:04,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:20:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 8166 transitions. [2020-12-22 02:20:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-12-22 02:20:04,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:04,962 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:20:04,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:20:04,963 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2031207372, now seen corresponding path program 1 times [2020-12-22 02:20:04,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:04,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768185589] [2020-12-22 02:20:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 02:20:05,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768185589] [2020-12-22 02:20:05,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:05,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:05,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434843741] [2020-12-22 02:20:05,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:05,260 INFO L87 Difference]: Start difference. First operand 7571 states and 8166 transitions. Second operand 3 states. [2020-12-22 02:20:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:06,774 INFO L93 Difference]: Finished difference Result 17443 states and 18996 transitions. [2020-12-22 02:20:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:06,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 368 [2020-12-22 02:20:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:06,794 INFO L225 Difference]: With dead ends: 17443 [2020-12-22 02:20:06,794 INFO L226 Difference]: Without dead ends: 10203 [2020-12-22 02:20:06,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2020-12-22 02:20:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 10203. [2020-12-22 02:20:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10203 states. [2020-12-22 02:20:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 11059 transitions. [2020-12-22 02:20:06,954 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 11059 transitions. Word has length 368 [2020-12-22 02:20:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:06,955 INFO L481 AbstractCegarLoop]: Abstraction has 10203 states and 11059 transitions. [2020-12-22 02:20:06,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 11059 transitions. [2020-12-22 02:20:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-12-22 02:20:06,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:06,964 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:20:06,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:20:06,964 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash 317936211, now seen corresponding path program 1 times [2020-12-22 02:20:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:06,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915813595] [2020-12-22 02:20:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-22 02:20:07,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915813595] [2020-12-22 02:20:07,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638611347] [2020-12-22 02:20:07,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:07,293 INFO L87 Difference]: Start difference. First operand 10203 states and 11059 transitions. Second operand 3 states. [2020-12-22 02:20:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:09,332 INFO L93 Difference]: Finished difference Result 22707 states and 24782 transitions. [2020-12-22 02:20:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:09,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2020-12-22 02:20:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:09,369 INFO L225 Difference]: With dead ends: 22707 [2020-12-22 02:20:09,370 INFO L226 Difference]: Without dead ends: 12835 [2020-12-22 02:20:09,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2020-12-22 02:20:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12506. [2020-12-22 02:20:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12506 states. [2020-12-22 02:20:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 13458 transitions. [2020-12-22 02:20:09,626 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 13458 transitions. Word has length 422 [2020-12-22 02:20:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:09,632 INFO L481 AbstractCegarLoop]: Abstraction has 12506 states and 13458 transitions. [2020-12-22 02:20:09,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 13458 transitions. [2020-12-22 02:20:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-12-22 02:20:09,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:09,644 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:20:09,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:20:09,644 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash 22149729, now seen corresponding path program 1 times [2020-12-22 02:20:09,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:09,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829258224] [2020-12-22 02:20:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-12-22 02:20:10,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829258224] [2020-12-22 02:20:10,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692591260] [2020-12-22 02:20:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:20:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:20:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-12-22 02:20:11,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:20:11,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 02:20:11,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419603469] [2020-12-22 02:20:11,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:20:11,685 INFO L87 Difference]: Start difference. First operand 12506 states and 13458 transitions. Second operand 3 states. [2020-12-22 02:20:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:13,195 INFO L93 Difference]: Finished difference Result 14811 states and 15817 transitions. [2020-12-22 02:20:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:13,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-12-22 02:20:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:13,225 INFO L225 Difference]: With dead ends: 14811 [2020-12-22 02:20:13,226 INFO L226 Difference]: Without dead ends: 14809 [2020-12-22 02:20:13,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 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 02:20:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2020-12-22 02:20:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 13164. [2020-12-22 02:20:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13164 states. [2020-12-22 02:20:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 14139 transitions. [2020-12-22 02:20:13,437 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 14139 transitions. Word has length 483 [2020-12-22 02:20:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:13,438 INFO L481 AbstractCegarLoop]: Abstraction has 13164 states and 14139 transitions. [2020-12-22 02:20:13,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 14139 transitions. [2020-12-22 02:20:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2020-12-22 02:20:13,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:13,456 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:13,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 02:20:13,672 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash 947650037, now seen corresponding path program 1 times [2020-12-22 02:20:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:13,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551017466] [2020-12-22 02:20:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 844 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2020-12-22 02:20:14,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551017466] [2020-12-22 02:20:14,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:14,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:14,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583342212] [2020-12-22 02:20:14,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:14,639 INFO L87 Difference]: Start difference. First operand 13164 states and 14139 transitions. Second operand 3 states. [2020-12-22 02:20:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:16,375 INFO L93 Difference]: Finished difference Result 25997 states and 27945 transitions. [2020-12-22 02:20:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:16,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 831 [2020-12-22 02:20:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:16,410 INFO L225 Difference]: With dead ends: 25997 [2020-12-22 02:20:16,410 INFO L226 Difference]: Without dead ends: 13164 [2020-12-22 02:20:16,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2020-12-22 02:20:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 12506. [2020-12-22 02:20:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12506 states. [2020-12-22 02:20:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 13162 transitions. [2020-12-22 02:20:16,622 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 13162 transitions. Word has length 831 [2020-12-22 02:20:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:16,624 INFO L481 AbstractCegarLoop]: Abstraction has 12506 states and 13162 transitions. [2020-12-22 02:20:16,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 13162 transitions. [2020-12-22 02:20:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 833 [2020-12-22 02:20:16,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:16,644 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:16,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:20:16,645 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:16,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1458179654, now seen corresponding path program 1 times [2020-12-22 02:20:16,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:16,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539107947] [2020-12-22 02:20:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-12-22 02:20:17,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539107947] [2020-12-22 02:20:17,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:17,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:17,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144969795] [2020-12-22 02:20:17,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:17,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:17,833 INFO L87 Difference]: Start difference. First operand 12506 states and 13162 transitions. Second operand 3 states. [2020-12-22 02:20:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:19,538 INFO L93 Difference]: Finished difference Result 24681 states and 25991 transitions. [2020-12-22 02:20:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:19,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 832 [2020-12-22 02:20:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:19,559 INFO L225 Difference]: With dead ends: 24681 [2020-12-22 02:20:19,560 INFO L226 Difference]: Without dead ends: 12506 [2020-12-22 02:20:19,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2020-12-22 02:20:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2020-12-22 02:20:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12506 states. [2020-12-22 02:20:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 13084 transitions. [2020-12-22 02:20:19,851 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 13084 transitions. Word has length 832 [2020-12-22 02:20:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:19,852 INFO L481 AbstractCegarLoop]: Abstraction has 12506 states and 13084 transitions. [2020-12-22 02:20:19,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 13084 transitions. [2020-12-22 02:20:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2020-12-22 02:20:19,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:19,875 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:19,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:20:19,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:19,877 INFO L82 PathProgramCache]: Analyzing trace with hash 315590477, now seen corresponding path program 1 times [2020-12-22 02:20:19,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:19,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756662040] [2020-12-22 02:20:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2020-12-22 02:20:20,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756662040] [2020-12-22 02:20:20,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:20,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408633239] [2020-12-22 02:20:20,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:20,691 INFO L87 Difference]: Start difference. First operand 12506 states and 13084 transitions. Second operand 3 states. [2020-12-22 02:20:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:22,425 INFO L93 Difference]: Finished difference Result 27642 states and 28880 transitions. [2020-12-22 02:20:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:22,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 886 [2020-12-22 02:20:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:22,451 INFO L225 Difference]: With dead ends: 27642 [2020-12-22 02:20:22,451 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:20:22,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:20:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 14480. [2020-12-22 02:20:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2020-12-22 02:20:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 15065 transitions. [2020-12-22 02:20:22,647 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 15065 transitions. Word has length 886 [2020-12-22 02:20:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:22,648 INFO L481 AbstractCegarLoop]: Abstraction has 14480 states and 15065 transitions. [2020-12-22 02:20:22,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 15065 transitions. [2020-12-22 02:20:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2020-12-22 02:20:22,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:22,672 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:22,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:20:22,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2126434978, now seen corresponding path program 1 times [2020-12-22 02:20:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:22,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578358109] [2020-12-22 02:20:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 798 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-12-22 02:20:23,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578358109] [2020-12-22 02:20:23,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:23,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:23,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271090112] [2020-12-22 02:20:23,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:23,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:23,753 INFO L87 Difference]: Start difference. First operand 14480 states and 15065 transitions. Second operand 3 states. [2020-12-22 02:20:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:25,435 INFO L93 Difference]: Finished difference Result 29945 states and 31129 transitions. [2020-12-22 02:20:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:25,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 944 [2020-12-22 02:20:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:25,455 INFO L225 Difference]: With dead ends: 29945 [2020-12-22 02:20:25,456 INFO L226 Difference]: Without dead ends: 14151 [2020-12-22 02:20:25,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2020-12-22 02:20:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 14151. [2020-12-22 02:20:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2020-12-22 02:20:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14551 transitions. [2020-12-22 02:20:25,620 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14551 transitions. Word has length 944 [2020-12-22 02:20:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:25,621 INFO L481 AbstractCegarLoop]: Abstraction has 14151 states and 14551 transitions. [2020-12-22 02:20:25,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14551 transitions. [2020-12-22 02:20:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2020-12-22 02:20:25,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:25,655 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:25,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:20:25,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 150254868, now seen corresponding path program 1 times [2020-12-22 02:20:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304501400] [2020-12-22 02:20:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 1731 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-12-22 02:20:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304501400] [2020-12-22 02:20:27,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:27,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 02:20:27,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263008380] [2020-12-22 02:20:27,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 02:20:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 02:20:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:20:27,769 INFO L87 Difference]: Start difference. First operand 14151 states and 14551 transitions. Second operand 6 states. [2020-12-22 02:20:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:29,964 INFO L93 Difference]: Finished difference Result 28083 states and 28881 transitions. [2020-12-22 02:20:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:20:29,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1262 [2020-12-22 02:20:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:29,985 INFO L225 Difference]: With dead ends: 28083 [2020-12-22 02:20:29,985 INFO L226 Difference]: Without dead ends: 14263 [2020-12-22 02:20:29,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14263 states. [2020-12-22 02:20:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14263 to 14151. [2020-12-22 02:20:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2020-12-22 02:20:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14538 transitions. [2020-12-22 02:20:30,240 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14538 transitions. Word has length 1262 [2020-12-22 02:20:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:30,242 INFO L481 AbstractCegarLoop]: Abstraction has 14151 states and 14538 transitions. [2020-12-22 02:20:30,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 02:20:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14538 transitions. [2020-12-22 02:20:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2020-12-22 02:20:30,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:30,296 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-12-22 02:20:30,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:20:30,298 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash -888439876, now seen corresponding path program 1 times [2020-12-22 02:20:30,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:30,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801654031] [2020-12-22 02:20:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2382 backedges. 1732 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-22 02:20:32,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801654031] [2020-12-22 02:20:32,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:32,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 02:20:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095893581] [2020-12-22 02:20:32,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:20:32,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:32,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:20:32,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:20:32,362 INFO L87 Difference]: Start difference. First operand 14151 states and 14538 transitions. Second operand 5 states. [2020-12-22 02:20:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:35,475 INFO L93 Difference]: Finished difference Result 28638 states and 29418 transitions. [2020-12-22 02:20:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:20:35,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1276 [2020-12-22 02:20:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:35,497 INFO L225 Difference]: With dead ends: 28638 [2020-12-22 02:20:35,497 INFO L226 Difference]: Without dead ends: 14818 [2020-12-22 02:20:35,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14818 states. [2020-12-22 02:20:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14818 to 14480. [2020-12-22 02:20:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2020-12-22 02:20:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14863 transitions. [2020-12-22 02:20:35,786 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14863 transitions. Word has length 1276 [2020-12-22 02:20:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:35,788 INFO L481 AbstractCegarLoop]: Abstraction has 14480 states and 14863 transitions. [2020-12-22 02:20:35,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:20:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14863 transitions. [2020-12-22 02:20:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1280 [2020-12-22 02:20:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:35,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:35,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:20:35,831 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2051068582, now seen corresponding path program 1 times [2020-12-22 02:20:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:35,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363492164] [2020-12-22 02:20:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2961 backedges. 1637 proven. 0 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-12-22 02:20:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363492164] [2020-12-22 02:20:37,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:37,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:37,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985905566] [2020-12-22 02:20:37,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:37,625 INFO L87 Difference]: Start difference. First operand 14480 states and 14863 transitions. Second operand 3 states. [2020-12-22 02:20:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:39,411 INFO L93 Difference]: Finished difference Result 28958 states and 29724 transitions. [2020-12-22 02:20:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:39,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1279 [2020-12-22 02:20:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:39,426 INFO L225 Difference]: With dead ends: 28958 [2020-12-22 02:20:39,426 INFO L226 Difference]: Without dead ends: 14809 [2020-12-22 02:20:39,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2020-12-22 02:20:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14809. [2020-12-22 02:20:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14809 states. [2020-12-22 02:20:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15190 transitions. [2020-12-22 02:20:39,629 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15190 transitions. Word has length 1279 [2020-12-22 02:20:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:39,630 INFO L481 AbstractCegarLoop]: Abstraction has 14809 states and 15190 transitions. [2020-12-22 02:20:39,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15190 transitions. [2020-12-22 02:20:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2020-12-22 02:20:39,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:39,657 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:39,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:20:39,657 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1622715469, now seen corresponding path program 1 times [2020-12-22 02:20:39,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:39,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575532189] [2020-12-22 02:20:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 2245 proven. 6 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2020-12-22 02:20:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575532189] [2020-12-22 02:20:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332297869] [2020-12-22 02:20:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:20:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:42,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 02:20:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 1590 proven. 201 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-12-22 02:20:47,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:20:47,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2020-12-22 02:20:47,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913410194] [2020-12-22 02:20:47,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 02:20:47,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 02:20:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 02:20:47,240 INFO L87 Difference]: Start difference. First operand 14809 states and 15190 transitions. Second operand 10 states. [2020-12-22 02:21:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:04,339 INFO L93 Difference]: Finished difference Result 43548 states and 44728 transitions. [2020-12-22 02:21:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 02:21:04,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1333 [2020-12-22 02:21:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:04,387 INFO L225 Difference]: With dead ends: 43548 [2020-12-22 02:21:04,388 INFO L226 Difference]: Without dead ends: 29070 [2020-12-22 02:21:04,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1361 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-12-22 02:21:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29070 states. [2020-12-22 02:21:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29070 to 16125. [2020-12-22 02:21:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16125 states. [2020-12-22 02:21:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16470 transitions. [2020-12-22 02:21:04,757 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16470 transitions. Word has length 1333 [2020-12-22 02:21:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:04,758 INFO L481 AbstractCegarLoop]: Abstraction has 16125 states and 16470 transitions. [2020-12-22 02:21:04,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 02:21:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16470 transitions. [2020-12-22 02:21:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1618 [2020-12-22 02:21:04,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:04,797 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:05,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 02:21:05,011 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1363103843, now seen corresponding path program 1 times [2020-12-22 02:21:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970842577] [2020-12-22 02:21:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 1964 proven. 156 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2020-12-22 02:21:08,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970842577] [2020-12-22 02:21:08,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537876644] [2020-12-22 02:21:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:21:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2120 proven. 0 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2020-12-22 02:21:12,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:12,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 02:21:12,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053160847] [2020-12-22 02:21:12,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:12,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:21:12,189 INFO L87 Difference]: Start difference. First operand 16125 states and 16470 transitions. Second operand 3 states. [2020-12-22 02:21:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:14,204 INFO L93 Difference]: Finished difference Result 33893 states and 34642 transitions. [2020-12-22 02:21:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:14,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1617 [2020-12-22 02:21:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:14,233 INFO L225 Difference]: With dead ends: 33893 [2020-12-22 02:21:14,233 INFO L226 Difference]: Without dead ends: 18099 [2020-12-22 02:21:14,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1621 GetRequests, 1616 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:21:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2020-12-22 02:21:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 15467. [2020-12-22 02:21:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15467 states. [2020-12-22 02:21:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15775 transitions. [2020-12-22 02:21:14,461 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15775 transitions. Word has length 1617 [2020-12-22 02:21:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:14,461 INFO L481 AbstractCegarLoop]: Abstraction has 15467 states and 15775 transitions. [2020-12-22 02:21:14,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15775 transitions. [2020-12-22 02:21:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1681 [2020-12-22 02:21:14,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:14,493 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:14,708 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash 601488976, now seen corresponding path program 1 times [2020-12-22 02:21:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:14,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484463682] [2020-12-22 02:21:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4890 backedges. 2063 proven. 1581 refuted. 0 times theorem prover too weak. 1246 trivial. 0 not checked. [2020-12-22 02:21:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484463682] [2020-12-22 02:21:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439644577] [2020-12-22 02:21:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:21:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4890 backedges. 2039 proven. 0 refuted. 0 times theorem prover too weak. 2851 trivial. 0 not checked. [2020-12-22 02:21:22,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:22,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 02:21:22,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247106500] [2020-12-22 02:21:22,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:22,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:21:22,810 INFO L87 Difference]: Start difference. First operand 15467 states and 15775 transitions. Second operand 3 states. [2020-12-22 02:21:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:24,714 INFO L93 Difference]: Finished difference Result 31590 states and 32217 transitions. [2020-12-22 02:21:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:24,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1680 [2020-12-22 02:21:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:24,741 INFO L225 Difference]: With dead ends: 31590 [2020-12-22 02:21:24,741 INFO L226 Difference]: Without dead ends: 16125 [2020-12-22 02:21:24,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1685 GetRequests, 1681 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:21:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2020-12-22 02:21:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 15796. [2020-12-22 02:21:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15796 states. [2020-12-22 02:21:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16110 transitions. [2020-12-22 02:21:25,016 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16110 transitions. Word has length 1680 [2020-12-22 02:21:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:25,018 INFO L481 AbstractCegarLoop]: Abstraction has 15796 states and 16110 transitions. [2020-12-22 02:21:25,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16110 transitions. [2020-12-22 02:21:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1750 [2020-12-22 02:21:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:25,073 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:25,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:25,287 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1308440807, now seen corresponding path program 1 times [2020-12-22 02:21:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:25,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727482595] [2020-12-22 02:21:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5282 backedges. 2431 proven. 0 refuted. 0 times theorem prover too weak. 2851 trivial. 0 not checked. [2020-12-22 02:21:27,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727482595] [2020-12-22 02:21:27,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:27,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:27,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031573884] [2020-12-22 02:21:27,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:27,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:27,555 INFO L87 Difference]: Start difference. First operand 15796 states and 16110 transitions. Second operand 3 states. [2020-12-22 02:21:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:29,404 INFO L93 Difference]: Finished difference Result 33893 states and 34559 transitions. [2020-12-22 02:21:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:29,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1749 [2020-12-22 02:21:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:29,420 INFO L225 Difference]: With dead ends: 33893 [2020-12-22 02:21:29,420 INFO L226 Difference]: Without dead ends: 15796 [2020-12-22 02:21:29,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2020-12-22 02:21:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15796. [2020-12-22 02:21:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15796 states. [2020-12-22 02:21:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16073 transitions. [2020-12-22 02:21:29,621 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16073 transitions. Word has length 1749 [2020-12-22 02:21:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:29,623 INFO L481 AbstractCegarLoop]: Abstraction has 15796 states and 16073 transitions. [2020-12-22 02:21:29,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16073 transitions. [2020-12-22 02:21:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1908 [2020-12-22 02:21:29,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:29,662 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 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] [2020-12-22 02:21:29,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:21:29,662 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1441991275, now seen corresponding path program 1 times [2020-12-22 02:21:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402432395] [2020-12-22 02:21:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6570 backedges. 4989 proven. 41 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-12-22 02:21:35,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402432395] [2020-12-22 02:21:35,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861534983] [2020-12-22 02:21:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:21:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6570 backedges. 1854 proven. 0 refuted. 0 times theorem prover too weak. 4716 trivial. 0 not checked. [2020-12-22 02:21:39,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:39,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2020-12-22 02:21:39,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875218478] [2020-12-22 02:21:39,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:39,779 INFO L87 Difference]: Start difference. First operand 15796 states and 16073 transitions. Second operand 3 states. [2020-12-22 02:21:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:41,552 INFO L93 Difference]: Finished difference Result 31261 states and 31813 transitions. [2020-12-22 02:21:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:41,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1907 [2020-12-22 02:21:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:41,572 INFO L225 Difference]: With dead ends: 31261 [2020-12-22 02:21:41,572 INFO L226 Difference]: Without dead ends: 15796 [2020-12-22 02:21:41,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1914 GetRequests, 1907 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2020-12-22 02:21:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15467. [2020-12-22 02:21:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15467 states. [2020-12-22 02:21:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15705 transitions. [2020-12-22 02:21:41,732 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15705 transitions. Word has length 1907 [2020-12-22 02:21:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:41,733 INFO L481 AbstractCegarLoop]: Abstraction has 15467 states and 15705 transitions. [2020-12-22 02:21:41,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15705 transitions. [2020-12-22 02:21:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1981 [2020-12-22 02:21:41,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:41,775 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:41,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 02:21:41,989 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash -735632661, now seen corresponding path program 1 times [2020-12-22 02:21:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:41,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044304468] [2020-12-22 02:21:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 3618 proven. 1035 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2020-12-22 02:21:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044304468] [2020-12-22 02:21:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301490876] [2020-12-22 02:21:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 2295 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:21:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 4108 proven. 0 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2020-12-22 02:21:52,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:52,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 02:21:52,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394470414] [2020-12-22 02:21:52,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:52,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:52,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:52,103 INFO L87 Difference]: Start difference. First operand 15467 states and 15705 transitions. Second operand 3 states. [2020-12-22 02:21:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:54,334 INFO L93 Difference]: Finished difference Result 33235 states and 33767 transitions. [2020-12-22 02:21:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:54,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1980 [2020-12-22 02:21:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:54,351 INFO L225 Difference]: With dead ends: 33235 [2020-12-22 02:21:54,351 INFO L226 Difference]: Without dead ends: 18099 [2020-12-22 02:21:54,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1988 GetRequests, 1981 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2020-12-22 02:21:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 17770. [2020-12-22 02:21:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17770 states. [2020-12-22 02:21:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 18031 transitions. [2020-12-22 02:21:54,553 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 18031 transitions. Word has length 1980 [2020-12-22 02:21:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:54,554 INFO L481 AbstractCegarLoop]: Abstraction has 17770 states and 18031 transitions. [2020-12-22 02:21:54,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 18031 transitions. [2020-12-22 02:21:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2112 [2020-12-22 02:21:54,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:54,601 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:54,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:54,817 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1868893928, now seen corresponding path program 1 times [2020-12-22 02:21:54,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:54,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261374893] [2020-12-22 02:21:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 3939 proven. 1166 refuted. 0 times theorem prover too weak. 2766 trivial. 0 not checked. [2020-12-22 02:22:01,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261374893] [2020-12-22 02:22:01,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733309737] [2020-12-22 02:22:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2423 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:22:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:22:03,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:22:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 4142 proven. 250 refuted. 0 times theorem prover too weak. 3479 trivial. 0 not checked. [2020-12-22 02:22:07,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:22:07,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2020-12-22 02:22:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754012903] [2020-12-22 02:22:07,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 02:22:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 02:22:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 02:22:07,981 INFO L87 Difference]: Start difference. First operand 17770 states and 18031 transitions. Second operand 10 states. [2020-12-22 02:22:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:23,358 INFO L93 Difference]: Finished difference Result 47047 states and 47750 transitions. [2020-12-22 02:22:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 02:22:23,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2111 [2020-12-22 02:22:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:23,392 INFO L225 Difference]: With dead ends: 47047 [2020-12-22 02:22:23,392 INFO L226 Difference]: Without dead ends: 29608 [2020-12-22 02:22:23,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2147 GetRequests, 2122 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-12-22 02:22:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29608 states. [2020-12-22 02:22:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29608 to 18099. [2020-12-22 02:22:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18099 states. [2020-12-22 02:22:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18360 transitions. [2020-12-22 02:22:23,770 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18360 transitions. Word has length 2111 [2020-12-22 02:22:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:23,771 INFO L481 AbstractCegarLoop]: Abstraction has 18099 states and 18360 transitions. [2020-12-22 02:22:23,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 02:22:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18360 transitions. [2020-12-22 02:22:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2160 [2020-12-22 02:22:23,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:23,814 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:24,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:24,025 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:24,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1327276837, now seen corresponding path program 1 times [2020-12-22 02:22:24,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:24,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232944017] [2020-12-22 02:22:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8774 backedges. 4204 proven. 2292 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2020-12-22 02:22:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232944017] [2020-12-22 02:22:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9025934] [2020-12-22 02:22:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:22:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:22:33,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:22:33,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:22:33,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:33,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:22:33,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:22:33,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:22:33,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:33,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:22:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8774 backedges. 4462 proven. 0 refuted. 0 times theorem prover too weak. 4312 trivial. 0 not checked. [2020-12-22 02:22:36,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:22:36,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-12-22 02:22:36,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447552453] [2020-12-22 02:22:36,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:36,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:22:36,110 INFO L87 Difference]: Start difference. First operand 18099 states and 18360 transitions. Second operand 4 states. [2020-12-22 02:22:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:39,259 INFO L93 Difference]: Finished difference Result 36525 states and 37061 transitions. [2020-12-22 02:22:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:39,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2159 [2020-12-22 02:22:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:39,289 INFO L225 Difference]: With dead ends: 36525 [2020-12-22 02:22:39,290 INFO L226 Difference]: Without dead ends: 18757 [2020-12-22 02:22:39,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2165 GetRequests, 2159 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:22:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2020-12-22 02:22:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 18757. [2020-12-22 02:22:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18757 states. [2020-12-22 02:22:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18757 states to 18757 states and 19031 transitions. [2020-12-22 02:22:39,529 INFO L78 Accepts]: Start accepts. Automaton has 18757 states and 19031 transitions. Word has length 2159 [2020-12-22 02:22:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:39,530 INFO L481 AbstractCegarLoop]: Abstraction has 18757 states and 19031 transitions. [2020-12-22 02:22:39,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18757 states and 19031 transitions. [2020-12-22 02:22:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2213 [2020-12-22 02:22:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:39,567 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 02:22:39,782 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1795788793, now seen corresponding path program 1 times [2020-12-22 02:22:39,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:39,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539760775] [2020-12-22 02:22:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8805 backedges. 6161 proven. 0 refuted. 0 times theorem prover too weak. 2644 trivial. 0 not checked. [2020-12-22 02:22:44,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539760775] [2020-12-22 02:22:44,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:44,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:22:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250542169] [2020-12-22 02:22:44,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:44,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:44,119 INFO L87 Difference]: Start difference. First operand 18757 states and 19031 transitions. Second operand 4 states. [2020-12-22 02:22:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:47,932 INFO L93 Difference]: Finished difference Result 39815 states and 40394 transitions. [2020-12-22 02:22:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:47,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2212 [2020-12-22 02:22:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:47,957 INFO L225 Difference]: With dead ends: 39815 [2020-12-22 02:22:47,957 INFO L226 Difference]: Without dead ends: 21389 [2020-12-22 02:22:47,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21389 states. [2020-12-22 02:22:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21389 to 19415. [2020-12-22 02:22:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19415 states. [2020-12-22 02:22:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19415 states to 19415 states and 19694 transitions. [2020-12-22 02:22:48,175 INFO L78 Accepts]: Start accepts. Automaton has 19415 states and 19694 transitions. Word has length 2212 [2020-12-22 02:22:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:48,176 INFO L481 AbstractCegarLoop]: Abstraction has 19415 states and 19694 transitions. [2020-12-22 02:22:48,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19415 states and 19694 transitions. [2020-12-22 02:22:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2271 [2020-12-22 02:22:48,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:48,214 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:48,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 02:22:48,215 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1981237678, now seen corresponding path program 1 times [2020-12-22 02:22:48,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:48,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095091760] [2020-12-22 02:22:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9668 backedges. 4284 proven. 0 refuted. 0 times theorem prover too weak. 5384 trivial. 0 not checked. [2020-12-22 02:22:51,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095091760] [2020-12-22 02:22:51,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:51,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:51,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756384858] [2020-12-22 02:22:51,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:51,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:51,851 INFO L87 Difference]: Start difference. First operand 19415 states and 19694 transitions. Second operand 3 states. [2020-12-22 02:22:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:54,467 INFO L93 Difference]: Finished difference Result 42120 states and 42735 transitions. [2020-12-22 02:22:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:54,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2270 [2020-12-22 02:22:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:54,493 INFO L225 Difference]: With dead ends: 42120 [2020-12-22 02:22:54,493 INFO L226 Difference]: Without dead ends: 23036 [2020-12-22 02:22:54,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23036 states. [2020-12-22 02:22:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23036 to 19744. [2020-12-22 02:22:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19744 states. [2020-12-22 02:22:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 20026 transitions. [2020-12-22 02:22:54,725 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 20026 transitions. Word has length 2270 [2020-12-22 02:22:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:54,726 INFO L481 AbstractCegarLoop]: Abstraction has 19744 states and 20026 transitions. [2020-12-22 02:22:54,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 20026 transitions. [2020-12-22 02:22:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2289 [2020-12-22 02:22:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:54,765 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:54,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 02:22:54,766 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:54,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1615550261, now seen corresponding path program 1 times [2020-12-22 02:22:54,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:54,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40826854] [2020-12-22 02:22:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 4880 proven. 2402 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2020-12-22 02:23:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40826854] [2020-12-22 02:23:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551072324] [2020-12-22 02:23:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:23:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:02,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:23:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:23:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 5248 proven. 0 refuted. 0 times theorem prover too weak. 4312 trivial. 0 not checked. [2020-12-22 02:23:07,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:23:07,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-12-22 02:23:07,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924633745] [2020-12-22 02:23:07,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:23:07,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:23:07,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:23:07,587 INFO L87 Difference]: Start difference. First operand 19744 states and 20026 transitions. Second operand 4 states. [2020-12-22 02:23:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:11,397 INFO L93 Difference]: Finished difference Result 39157 states and 39719 transitions. [2020-12-22 02:23:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:23:11,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2288 [2020-12-22 02:23:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:11,422 INFO L225 Difference]: With dead ends: 39157 [2020-12-22 02:23:11,422 INFO L226 Difference]: Without dead ends: 19744 [2020-12-22 02:23:11,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2294 GetRequests, 2288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:23:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2020-12-22 02:23:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 19415. [2020-12-22 02:23:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19415 states. [2020-12-22 02:23:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19415 states to 19415 states and 19682 transitions. [2020-12-22 02:23:11,639 INFO L78 Accepts]: Start accepts. Automaton has 19415 states and 19682 transitions. Word has length 2288 [2020-12-22 02:23:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:11,640 INFO L481 AbstractCegarLoop]: Abstraction has 19415 states and 19682 transitions. [2020-12-22 02:23:11,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:23:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19415 states and 19682 transitions. [2020-12-22 02:23:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2328 [2020-12-22 02:23:11,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:11,680 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:23:11,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 02:23:11,881 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash 147807502, now seen corresponding path program 1 times [2020-12-22 02:23:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:11,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921239341] [2020-12-22 02:23:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 02:23:12,560 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 02:23:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 02:23:13,227 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 02:23:14,663 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 02:23:14,663 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 02:23:14,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28