/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:29,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:29,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:29,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:39:29,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:29,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:29,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:29,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:29,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:29,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:29,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:29,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:29,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:29,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:29,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:29,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:29,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:39:29,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:29,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:29,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:29,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:29,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:29,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:29,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:29,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:29,903 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:29,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:29,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:29,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:29,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:29,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:29,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:29,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:29,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:29,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:29,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:29,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:29,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:29,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:29,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:29,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:29,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:29,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:29,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:29,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:29,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:29,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:30,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:30,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:30,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:30,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:30,337 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:30,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:30,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f297154dc/837df3e1a1a7427c8d73e0514feafc20/FLAG70a8a6412 [2020-12-22 07:39:31,177 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:31,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:31,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f297154dc/837df3e1a1a7427c8d73e0514feafc20/FLAG70a8a6412 [2020-12-22 07:39:31,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f297154dc/837df3e1a1a7427c8d73e0514feafc20 [2020-12-22 07:39:31,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:31,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:31,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:31,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:31,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:31,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389b2949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31, skipping insertion in model container [2020-12-22 07:39:31,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:31,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:31,858 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2020-12-22 07:39:31,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:31,876 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:31,947 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2020-12-22 07:39:31,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:31,972 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:31,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31 WrapperNode [2020-12-22 07:39:31,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:31,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:31,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:31,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:31,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:32,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:32,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:32,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:32,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:32,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:32,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:32,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:32,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:32,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:33,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:33,342 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:33,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:33 BoogieIcfgContainer [2020-12-22 07:39:33,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:33,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:33,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:33,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:33,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:31" (1/3) ... [2020-12-22 07:39:33,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df3b2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:33, skipping insertion in model container [2020-12-22 07:39:33,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (2/3) ... [2020-12-22 07:39:33,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df3b2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:33, skipping insertion in model container [2020-12-22 07:39:33,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:33" (3/3) ... [2020-12-22 07:39:33,354 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:33,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:33,367 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:33,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:33,417 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:33,417 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:33,418 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:33,418 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:33,418 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:33,418 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:33,418 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:33,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-12-22 07:39:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:33,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:33,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:33,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash 126688108, now seen corresponding path program 1 times [2020-12-22 07:39:33,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:33,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177751617] [2020-12-22 07:39:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:33,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177751617] [2020-12-22 07:39:33,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:33,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:33,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143882959] [2020-12-22 07:39:33,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:33,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:33,786 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 2 states. [2020-12-22 07:39:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:33,822 INFO L93 Difference]: Finished difference Result 227 states and 389 transitions. [2020-12-22 07:39:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:33,823 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:33,838 INFO L225 Difference]: With dead ends: 227 [2020-12-22 07:39:33,839 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 07:39:33,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 07:39:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-12-22 07:39:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 07:39:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 237 transitions. [2020-12-22 07:39:33,898 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 237 transitions. Word has length 37 [2020-12-22 07:39:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:33,899 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 237 transitions. [2020-12-22 07:39:33,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 237 transitions. [2020-12-22 07:39:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:33,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:33,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:33,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:33,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash -690960342, now seen corresponding path program 1 times [2020-12-22 07:39:33,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:33,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986559824] [2020-12-22 07:39:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:34,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986559824] [2020-12-22 07:39:34,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:34,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426297865] [2020-12-22 07:39:34,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:34,079 INFO L87 Difference]: Start difference. First operand 138 states and 237 transitions. Second operand 5 states. [2020-12-22 07:39:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,221 INFO L93 Difference]: Finished difference Result 226 states and 382 transitions. [2020-12-22 07:39:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:34,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,223 INFO L225 Difference]: With dead ends: 226 [2020-12-22 07:39:34,224 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 07:39:34,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 07:39:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-12-22 07:39:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 07:39:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 213 transitions. [2020-12-22 07:39:34,249 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 213 transitions. Word has length 37 [2020-12-22 07:39:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,254 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 213 transitions. [2020-12-22 07:39:34,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 213 transitions. [2020-12-22 07:39:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 07:39:34,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:34,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 747585835, now seen corresponding path program 1 times [2020-12-22 07:39:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559948119] [2020-12-22 07:39:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:34,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559948119] [2020-12-22 07:39:34,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:34,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082498781] [2020-12-22 07:39:34,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:34,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:34,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,439 INFO L87 Difference]: Start difference. First operand 138 states and 213 transitions. Second operand 3 states. [2020-12-22 07:39:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,510 INFO L93 Difference]: Finished difference Result 296 states and 477 transitions. [2020-12-22 07:39:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:34,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 07:39:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,514 INFO L225 Difference]: With dead ends: 296 [2020-12-22 07:39:34,515 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 07:39:34,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 07:39:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-12-22 07:39:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 07:39:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 328 transitions. [2020-12-22 07:39:34,554 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 328 transitions. Word has length 60 [2020-12-22 07:39:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,555 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 328 transitions. [2020-12-22 07:39:34,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 328 transitions. [2020-12-22 07:39:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:39:34,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:34,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -53855584, now seen corresponding path program 1 times [2020-12-22 07:39:34,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701103453] [2020-12-22 07:39:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:34,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701103453] [2020-12-22 07:39:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:34,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282537797] [2020-12-22 07:39:34,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,779 INFO L87 Difference]: Start difference. First operand 209 states and 328 transitions. Second operand 3 states. [2020-12-22 07:39:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,843 INFO L93 Difference]: Finished difference Result 503 states and 812 transitions. [2020-12-22 07:39:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:34,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 07:39:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,849 INFO L225 Difference]: With dead ends: 503 [2020-12-22 07:39:34,849 INFO L226 Difference]: Without dead ends: 348 [2020-12-22 07:39:34,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-22 07:39:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2020-12-22 07:39:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 07:39:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 549 transitions. [2020-12-22 07:39:34,894 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 549 transitions. Word has length 62 [2020-12-22 07:39:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,894 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 549 transitions. [2020-12-22 07:39:34,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 549 transitions. [2020-12-22 07:39:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:39:34,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:34,898 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash -730458987, now seen corresponding path program 1 times [2020-12-22 07:39:34,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841223684] [2020-12-22 07:39:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:35,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841223684] [2020-12-22 07:39:35,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221647222] [2020-12-22 07:39:35,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:35,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:35,017 INFO L87 Difference]: Start difference. First operand 344 states and 549 transitions. Second operand 3 states. [2020-12-22 07:39:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,108 INFO L93 Difference]: Finished difference Result 892 states and 1447 transitions. [2020-12-22 07:39:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:35,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:39:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,115 INFO L225 Difference]: With dead ends: 892 [2020-12-22 07:39:35,116 INFO L226 Difference]: Without dead ends: 602 [2020-12-22 07:39:35,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-12-22 07:39:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 596. [2020-12-22 07:39:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-12-22 07:39:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 957 transitions. [2020-12-22 07:39:35,159 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 957 transitions. Word has length 64 [2020-12-22 07:39:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:35,161 INFO L481 AbstractCegarLoop]: Abstraction has 596 states and 957 transitions. [2020-12-22 07:39:35,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 957 transitions. [2020-12-22 07:39:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:35,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:35,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:35,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:39:35,163 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1382576374, now seen corresponding path program 1 times [2020-12-22 07:39:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:35,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056991856] [2020-12-22 07:39:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056991856] [2020-12-22 07:39:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534124806] [2020-12-22 07:39:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:35,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:35,376 INFO L87 Difference]: Start difference. First operand 596 states and 957 transitions. Second operand 5 states. [2020-12-22 07:39:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,623 INFO L93 Difference]: Finished difference Result 2290 states and 3762 transitions. [2020-12-22 07:39:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:39:35,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 07:39:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,635 INFO L225 Difference]: With dead ends: 2290 [2020-12-22 07:39:35,636 INFO L226 Difference]: Without dead ends: 1748 [2020-12-22 07:39:35,638 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 07:39:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2020-12-22 07:39:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1071. [2020-12-22 07:39:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-12-22 07:39:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1733 transitions. [2020-12-22 07:39:35,690 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1733 transitions. Word has length 66 [2020-12-22 07:39:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:35,691 INFO L481 AbstractCegarLoop]: Abstraction has 1071 states and 1733 transitions. [2020-12-22 07:39:35,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1733 transitions. [2020-12-22 07:39:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:39:35,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:35,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:35,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:39:35,693 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1833027237, now seen corresponding path program 1 times [2020-12-22 07:39:35,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:35,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404498173] [2020-12-22 07:39:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:35,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404498173] [2020-12-22 07:39:35,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:35,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413096674] [2020-12-22 07:39:35,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:35,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:35,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:35,779 INFO L87 Difference]: Start difference. First operand 1071 states and 1733 transitions. Second operand 4 states. [2020-12-22 07:39:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,941 INFO L93 Difference]: Finished difference Result 3132 states and 5136 transitions. [2020-12-22 07:39:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:35,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 07:39:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,954 INFO L225 Difference]: With dead ends: 3132 [2020-12-22 07:39:35,954 INFO L226 Difference]: Without dead ends: 2115 [2020-12-22 07:39:35,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2020-12-22 07:39:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1584. [2020-12-22 07:39:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2020-12-22 07:39:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2575 transitions. [2020-12-22 07:39:36,051 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2575 transitions. Word has length 67 [2020-12-22 07:39:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,051 INFO L481 AbstractCegarLoop]: Abstraction has 1584 states and 2575 transitions. [2020-12-22 07:39:36,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2575 transitions. [2020-12-22 07:39:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:36,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:36,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:39:36,054 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1551869537, now seen corresponding path program 1 times [2020-12-22 07:39:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135924225] [2020-12-22 07:39:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:36,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135924225] [2020-12-22 07:39:36,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:36,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859929715] [2020-12-22 07:39:36,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:36,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:36,122 INFO L87 Difference]: Start difference. First operand 1584 states and 2575 transitions. Second operand 4 states. [2020-12-22 07:39:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:36,280 INFO L93 Difference]: Finished difference Result 4606 states and 7540 transitions. [2020-12-22 07:39:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:36,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-12-22 07:39:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:36,298 INFO L225 Difference]: With dead ends: 4606 [2020-12-22 07:39:36,298 INFO L226 Difference]: Without dead ends: 3076 [2020-12-22 07:39:36,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-12-22 07:39:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2318. [2020-12-22 07:39:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2318 states. [2020-12-22 07:39:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 3765 transitions. [2020-12-22 07:39:36,417 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 3765 transitions. Word has length 68 [2020-12-22 07:39:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 2318 states and 3765 transitions. [2020-12-22 07:39:36,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 3765 transitions. [2020-12-22 07:39:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:39:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:36,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:39:36,420 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -721508526, now seen corresponding path program 1 times [2020-12-22 07:39:36,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99388073] [2020-12-22 07:39:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:36,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99388073] [2020-12-22 07:39:36,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:36,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285798779] [2020-12-22 07:39:36,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:36,507 INFO L87 Difference]: Start difference. First operand 2318 states and 3765 transitions. Second operand 4 states. [2020-12-22 07:39:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:36,725 INFO L93 Difference]: Finished difference Result 6698 states and 10940 transitions. [2020-12-22 07:39:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:36,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 07:39:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:36,750 INFO L225 Difference]: With dead ends: 6698 [2020-12-22 07:39:36,750 INFO L226 Difference]: Without dead ends: 4434 [2020-12-22 07:39:36,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2020-12-22 07:39:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 3360. [2020-12-22 07:39:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-12-22 07:39:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 5449 transitions. [2020-12-22 07:39:36,949 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 5449 transitions. Word has length 69 [2020-12-22 07:39:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,950 INFO L481 AbstractCegarLoop]: Abstraction has 3360 states and 5449 transitions. [2020-12-22 07:39:36,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 5449 transitions. [2020-12-22 07:39:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:36,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:36,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:39:36,959 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash -612676452, now seen corresponding path program 1 times [2020-12-22 07:39:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989566707] [2020-12-22 07:39:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989566707] [2020-12-22 07:39:37,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:37,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482849096] [2020-12-22 07:39:37,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:37,021 INFO L87 Difference]: Start difference. First operand 3360 states and 5449 transitions. Second operand 3 states. [2020-12-22 07:39:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:37,208 INFO L93 Difference]: Finished difference Result 7646 states and 12406 transitions. [2020-12-22 07:39:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:37,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:37,238 INFO L225 Difference]: With dead ends: 7646 [2020-12-22 07:39:37,238 INFO L226 Difference]: Without dead ends: 5256 [2020-12-22 07:39:37,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2020-12-22 07:39:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 5254. [2020-12-22 07:39:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5254 states. [2020-12-22 07:39:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 8456 transitions. [2020-12-22 07:39:37,489 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 8456 transitions. Word has length 70 [2020-12-22 07:39:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 5254 states and 8456 transitions. [2020-12-22 07:39:37,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 8456 transitions. [2020-12-22 07:39:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:37,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:37,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:37,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1846404324, now seen corresponding path program 1 times [2020-12-22 07:39:37,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132980911] [2020-12-22 07:39:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:37,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132980911] [2020-12-22 07:39:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253638519] [2020-12-22 07:39:37,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:37,612 INFO L87 Difference]: Start difference. First operand 5254 states and 8456 transitions. Second operand 3 states. [2020-12-22 07:39:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:37,903 INFO L93 Difference]: Finished difference Result 11466 states and 18510 transitions. [2020-12-22 07:39:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:37,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:37,946 INFO L225 Difference]: With dead ends: 11466 [2020-12-22 07:39:37,946 INFO L226 Difference]: Without dead ends: 7766 [2020-12-22 07:39:37,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2020-12-22 07:39:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 7764. [2020-12-22 07:39:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7764 states. [2020-12-22 07:39:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7764 states to 7764 states and 12440 transitions. [2020-12-22 07:39:38,365 INFO L78 Accepts]: Start accepts. Automaton has 7764 states and 12440 transitions. Word has length 70 [2020-12-22 07:39:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:38,366 INFO L481 AbstractCegarLoop]: Abstraction has 7764 states and 12440 transitions. [2020-12-22 07:39:38,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7764 states and 12440 transitions. [2020-12-22 07:39:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:38,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:38,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:38,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:38,368 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -827061860, now seen corresponding path program 1 times [2020-12-22 07:39:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323684276] [2020-12-22 07:39:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323684276] [2020-12-22 07:39:38,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:38,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:38,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589236149] [2020-12-22 07:39:38,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:38,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:38,425 INFO L87 Difference]: Start difference. First operand 7764 states and 12440 transitions. Second operand 3 states. [2020-12-22 07:39:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:38,884 INFO L93 Difference]: Finished difference Result 17191 states and 27788 transitions. [2020-12-22 07:39:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:38,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:38,916 INFO L225 Difference]: With dead ends: 17191 [2020-12-22 07:39:38,916 INFO L226 Difference]: Without dead ends: 11534 [2020-12-22 07:39:38,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11534 states. [2020-12-22 07:39:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11534 to 11532. [2020-12-22 07:39:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11532 states. [2020-12-22 07:39:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11532 states to 11532 states and 18437 transitions. [2020-12-22 07:39:39,541 INFO L78 Accepts]: Start accepts. Automaton has 11532 states and 18437 transitions. Word has length 70 [2020-12-22 07:39:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:39,542 INFO L481 AbstractCegarLoop]: Abstraction has 11532 states and 18437 transitions. [2020-12-22 07:39:39,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 11532 states and 18437 transitions. [2020-12-22 07:39:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:39:39,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:39,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:39,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:39,544 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 287488266, now seen corresponding path program 1 times [2020-12-22 07:39:39,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:39,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063611236] [2020-12-22 07:39:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063611236] [2020-12-22 07:39:39,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:39,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272951347] [2020-12-22 07:39:39,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:39,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:39,676 INFO L87 Difference]: Start difference. First operand 11532 states and 18437 transitions. Second operand 4 states. [2020-12-22 07:39:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:40,737 INFO L93 Difference]: Finished difference Result 34091 states and 54439 transitions. [2020-12-22 07:39:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:40,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:39:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:40,802 INFO L225 Difference]: With dead ends: 34091 [2020-12-22 07:39:40,802 INFO L226 Difference]: Without dead ends: 22568 [2020-12-22 07:39:40,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22568 states. [2020-12-22 07:39:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22568 to 22566. [2020-12-22 07:39:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22566 states. [2020-12-22 07:39:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22566 states to 22566 states and 35790 transitions. [2020-12-22 07:39:41,927 INFO L78 Accepts]: Start accepts. Automaton has 22566 states and 35790 transitions. Word has length 71 [2020-12-22 07:39:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:41,927 INFO L481 AbstractCegarLoop]: Abstraction has 22566 states and 35790 transitions. [2020-12-22 07:39:41,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22566 states and 35790 transitions. [2020-12-22 07:39:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:41,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:41,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:41,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:41,929 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1965061944, now seen corresponding path program 1 times [2020-12-22 07:39:41,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:41,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288446103] [2020-12-22 07:39:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:41,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288446103] [2020-12-22 07:39:41,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:41,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:41,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577605111] [2020-12-22 07:39:41,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:41,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:41,980 INFO L87 Difference]: Start difference. First operand 22566 states and 35790 transitions. Second operand 3 states. [2020-12-22 07:39:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:43,278 INFO L93 Difference]: Finished difference Result 54899 states and 87564 transitions. [2020-12-22 07:39:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:43,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:39:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:43,383 INFO L225 Difference]: With dead ends: 54899 [2020-12-22 07:39:43,384 INFO L226 Difference]: Without dead ends: 32450 [2020-12-22 07:39:43,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32450 states. [2020-12-22 07:39:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32450 to 31174. [2020-12-22 07:39:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31174 states. [2020-12-22 07:39:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31174 states to 31174 states and 49343 transitions. [2020-12-22 07:39:44,932 INFO L78 Accepts]: Start accepts. Automaton has 31174 states and 49343 transitions. Word has length 72 [2020-12-22 07:39:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,932 INFO L481 AbstractCegarLoop]: Abstraction has 31174 states and 49343 transitions. [2020-12-22 07:39:44,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 31174 states and 49343 transitions. [2020-12-22 07:39:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:44,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:39:44,934 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2042723926, now seen corresponding path program 1 times [2020-12-22 07:39:44,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235138053] [2020-12-22 07:39:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235138053] [2020-12-22 07:39:44,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:44,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:44,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960428533] [2020-12-22 07:39:44,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:44,979 INFO L87 Difference]: Start difference. First operand 31174 states and 49343 transitions. Second operand 3 states. [2020-12-22 07:39:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:46,637 INFO L93 Difference]: Finished difference Result 93484 states and 147967 transitions. [2020-12-22 07:39:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:46,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:39:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:46,831 INFO L225 Difference]: With dead ends: 93484 [2020-12-22 07:39:46,831 INFO L226 Difference]: Without dead ends: 62338 [2020-12-22 07:39:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62338 states. [2020-12-22 07:39:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62338 to 31176. [2020-12-22 07:39:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31176 states. [2020-12-22 07:39:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31176 states to 31176 states and 49345 transitions. [2020-12-22 07:39:48,967 INFO L78 Accepts]: Start accepts. Automaton has 31176 states and 49345 transitions. Word has length 72 [2020-12-22 07:39:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,967 INFO L481 AbstractCegarLoop]: Abstraction has 31176 states and 49345 transitions. [2020-12-22 07:39:48,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 31176 states and 49345 transitions. [2020-12-22 07:39:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:48,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:48,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:39:48,970 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash -858327306, now seen corresponding path program 1 times [2020-12-22 07:39:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230650615] [2020-12-22 07:39:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230650615] [2020-12-22 07:39:49,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:49,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380025830] [2020-12-22 07:39:49,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:49,121 INFO L87 Difference]: Start difference. First operand 31176 states and 49345 transitions. Second operand 4 states. [2020-12-22 07:39:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,005 INFO L93 Difference]: Finished difference Result 92170 states and 145713 transitions. [2020-12-22 07:39:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:51,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,141 INFO L225 Difference]: With dead ends: 92170 [2020-12-22 07:39:51,141 INFO L226 Difference]: Without dead ends: 61024 [2020-12-22 07:39:51,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61024 states. [2020-12-22 07:39:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61024 to 61022. [2020-12-22 07:39:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61022 states. [2020-12-22 07:39:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61022 states to 61022 states and 95856 transitions. [2020-12-22 07:39:53,735 INFO L78 Accepts]: Start accepts. Automaton has 61022 states and 95856 transitions. Word has length 73 [2020-12-22 07:39:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:53,736 INFO L481 AbstractCegarLoop]: Abstraction has 61022 states and 95856 transitions. [2020-12-22 07:39:53,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 61022 states and 95856 transitions. [2020-12-22 07:39:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:53,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:53,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:53,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:39:53,738 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1115832228, now seen corresponding path program 1 times [2020-12-22 07:39:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129109233] [2020-12-22 07:39:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:53,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129109233] [2020-12-22 07:39:53,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:53,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54039841] [2020-12-22 07:39:53,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:53,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:53,789 INFO L87 Difference]: Start difference. First operand 61022 states and 95856 transitions. Second operand 3 states. [2020-12-22 07:39:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:56,838 INFO L93 Difference]: Finished difference Result 148126 states and 233512 transitions. [2020-12-22 07:39:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:56,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:57,039 INFO L225 Difference]: With dead ends: 148126 [2020-12-22 07:39:57,039 INFO L226 Difference]: Without dead ends: 87360 [2020-12-22 07:39:57,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87360 states. [2020-12-22 07:40:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87360 to 84030. [2020-12-22 07:40:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84030 states. [2020-12-22 07:40:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84030 states to 84030 states and 131478 transitions. [2020-12-22 07:40:00,589 INFO L78 Accepts]: Start accepts. Automaton has 84030 states and 131478 transitions. Word has length 74 [2020-12-22 07:40:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:00,589 INFO L481 AbstractCegarLoop]: Abstraction has 84030 states and 131478 transitions. [2020-12-22 07:40:00,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 84030 states and 131478 transitions. [2020-12-22 07:40:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:00,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:00,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:00,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:00,592 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1623085506, now seen corresponding path program 1 times [2020-12-22 07:40:00,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:00,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889407614] [2020-12-22 07:40:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889407614] [2020-12-22 07:40:00,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:00,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:00,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46888153] [2020-12-22 07:40:00,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:00,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:00,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:00,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:00,627 INFO L87 Difference]: Start difference. First operand 84030 states and 131478 transitions. Second operand 3 states. [2020-12-22 07:40:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:05,853 INFO L93 Difference]: Finished difference Result 252014 states and 394314 transitions. [2020-12-22 07:40:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:05,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:40:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:06,431 INFO L225 Difference]: With dead ends: 252014 [2020-12-22 07:40:06,431 INFO L226 Difference]: Without dead ends: 168028 [2020-12-22 07:40:06,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168028 states. [2020-12-22 07:40:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168028 to 84034. [2020-12-22 07:40:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84034 states. [2020-12-22 07:40:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84034 states to 84034 states and 131482 transitions. [2020-12-22 07:40:10,610 INFO L78 Accepts]: Start accepts. Automaton has 84034 states and 131482 transitions. Word has length 74 [2020-12-22 07:40:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:10,610 INFO L481 AbstractCegarLoop]: Abstraction has 84034 states and 131482 transitions. [2020-12-22 07:40:10,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 84034 states and 131482 transitions. [2020-12-22 07:40:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:40:10,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:10,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:10,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:10,612 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash -418317598, now seen corresponding path program 1 times [2020-12-22 07:40:10,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:10,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219388313] [2020-12-22 07:40:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:10,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219388313] [2020-12-22 07:40:10,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:10,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779336870] [2020-12-22 07:40:10,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:10,708 INFO L87 Difference]: Start difference. First operand 84034 states and 131482 transitions. Second operand 4 states. [2020-12-22 07:40:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:16,420 INFO L93 Difference]: Finished difference Result 248354 states and 388042 transitions. [2020-12-22 07:40:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:16,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:40:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:16,764 INFO L225 Difference]: With dead ends: 248354 [2020-12-22 07:40:16,764 INFO L226 Difference]: Without dead ends: 164368 [2020-12-22 07:40:16,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164368 states. [2020-12-22 07:40:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164368 to 164366. [2020-12-22 07:40:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164366 states. [2020-12-22 07:40:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164366 states to 164366 states and 255064 transitions. [2020-12-22 07:40:23,704 INFO L78 Accepts]: Start accepts. Automaton has 164366 states and 255064 transitions. Word has length 75 [2020-12-22 07:40:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:23,704 INFO L481 AbstractCegarLoop]: Abstraction has 164366 states and 255064 transitions. [2020-12-22 07:40:23,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 164366 states and 255064 transitions. [2020-12-22 07:40:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:23,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:23,707 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1354207360, now seen corresponding path program 1 times [2020-12-22 07:40:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:23,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923395291] [2020-12-22 07:40:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:23,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923395291] [2020-12-22 07:40:23,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:23,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955720709] [2020-12-22 07:40:23,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:23,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:23,769 INFO L87 Difference]: Start difference. First operand 164366 states and 255064 transitions. Second operand 3 states. [2020-12-22 07:40:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:31,840 INFO L93 Difference]: Finished difference Result 399802 states and 623386 transitions. [2020-12-22 07:40:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:31,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:32,642 INFO L225 Difference]: With dead ends: 399802 [2020-12-22 07:40:32,642 INFO L226 Difference]: Without dead ends: 235952 [2020-12-22 07:40:32,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235952 states. [2020-12-22 07:40:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235952 to 225870. [2020-12-22 07:40:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225870 states. [2020-12-22 07:40:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225870 states to 225870 states and 348512 transitions. [2020-12-22 07:40:42,700 INFO L78 Accepts]: Start accepts. Automaton has 225870 states and 348512 transitions. Word has length 76 [2020-12-22 07:40:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:42,701 INFO L481 AbstractCegarLoop]: Abstraction has 225870 states and 348512 transitions. [2020-12-22 07:40:42,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 225870 states and 348512 transitions. [2020-12-22 07:40:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:42,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:42,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:42,704 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1923205934, now seen corresponding path program 1 times [2020-12-22 07:40:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:42,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060060253] [2020-12-22 07:40:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060060253] [2020-12-22 07:40:42,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:42,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016405665] [2020-12-22 07:40:42,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:42,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:42,756 INFO L87 Difference]: Start difference. First operand 225870 states and 348512 transitions. Second operand 3 states. [2020-12-22 07:40:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:58,413 INFO L93 Difference]: Finished difference Result 677210 states and 1045014 transitions. [2020-12-22 07:40:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:58,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:59,539 INFO L225 Difference]: With dead ends: 677210 [2020-12-22 07:40:59,539 INFO L226 Difference]: Without dead ends: 451648 [2020-12-22 07:40:59,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451648 states. [2020-12-22 07:41:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451648 to 225878. [2020-12-22 07:41:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225878 states. [2020-12-22 07:41:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225878 states to 225878 states and 348520 transitions. [2020-12-22 07:41:12,457 INFO L78 Accepts]: Start accepts. Automaton has 225878 states and 348520 transitions. Word has length 76 [2020-12-22 07:41:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:12,457 INFO L481 AbstractCegarLoop]: Abstraction has 225878 states and 348520 transitions. [2020-12-22 07:41:12,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 225878 states and 348520 transitions. [2020-12-22 07:41:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:12,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:12,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:12,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:12,459 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1599719081, now seen corresponding path program 1 times [2020-12-22 07:41:12,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:12,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443297001] [2020-12-22 07:41:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:12,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443297001] [2020-12-22 07:41:12,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:12,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:12,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366531828] [2020-12-22 07:41:12,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:12,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:12,636 INFO L87 Difference]: Start difference. First operand 225878 states and 348520 transitions. Second operand 5 states. [2020-12-22 07:41:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:30,024 INFO L93 Difference]: Finished difference Result 638976 states and 985249 transitions. [2020-12-22 07:41:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:30,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:41:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:31,264 INFO L225 Difference]: With dead ends: 638976 [2020-12-22 07:41:31,264 INFO L226 Difference]: Without dead ends: 413186 [2020-12-22 07:41:31,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413186 states. [2020-12-22 07:41:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413186 to 413184. [2020-12-22 07:41:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413184 states. [2020-12-22 07:41:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413184 states to 413184 states and 631873 transitions. [2020-12-22 07:41:51,891 INFO L78 Accepts]: Start accepts. Automaton has 413184 states and 631873 transitions. Word has length 77 [2020-12-22 07:41:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:51,892 INFO L481 AbstractCegarLoop]: Abstraction has 413184 states and 631873 transitions. [2020-12-22 07:41:51,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 413184 states and 631873 transitions. [2020-12-22 07:41:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:51,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:51,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:51,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:41:51,905 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1662532402, now seen corresponding path program 1 times [2020-12-22 07:41:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:51,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224855719] [2020-12-22 07:41:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:52,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224855719] [2020-12-22 07:41:52,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:52,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216154964] [2020-12-22 07:41:52,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:52,051 INFO L87 Difference]: Start difference. First operand 413184 states and 631873 transitions. Second operand 5 states. [2020-12-22 07:42:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:13,563 INFO L93 Difference]: Finished difference Result 890130 states and 1365616 transitions. [2020-12-22 07:42:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:42:13,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:42:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:14,692 INFO L225 Difference]: With dead ends: 890130 [2020-12-22 07:42:14,692 INFO L226 Difference]: Without dead ends: 477952 [2020-12-22 07:42:15,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477952 states. [2020-12-22 07:42:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477952 to 413184. [2020-12-22 07:42:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413184 states. [2020-12-22 07:42:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413184 states to 413184 states and 626777 transitions. [2020-12-22 07:42:38,641 INFO L78 Accepts]: Start accepts. Automaton has 413184 states and 626777 transitions. Word has length 77 [2020-12-22 07:42:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:38,653 INFO L481 AbstractCegarLoop]: Abstraction has 413184 states and 626777 transitions. [2020-12-22 07:42:38,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:42:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 413184 states and 626777 transitions. [2020-12-22 07:42:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:42:38,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:38,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:38,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:38,656 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:38,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1531914368, now seen corresponding path program 1 times [2020-12-22 07:42:38,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:38,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807186643] [2020-12-22 07:42:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:38,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807186643] [2020-12-22 07:42:38,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:38,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:38,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549065920] [2020-12-22 07:42:38,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:38,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:38,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:38,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:38,860 INFO L87 Difference]: Start difference. First operand 413184 states and 626777 transitions. Second operand 5 states.