/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:27:26,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:27:26,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:27:26,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:27:26,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:27:26,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:27:26,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:27:26,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:27:26,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:27:26,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:27:26,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:27:26,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:27:26,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:27:26,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:27:26,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:27:26,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:27:26,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 01:27:26,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:27:26,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:27:26,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:27:26,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:27:26,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:27:26,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:27:26,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:27:26,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:27:26,632 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:27:26,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:27:26,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:27:26,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:27:26,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:27:26,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:27:26,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:27:26,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:27:26,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:27:26,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:27:26,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:27:26,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:27:26,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:27:26,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:27:26,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:27:26,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:27:26,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:27:26,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:27:26,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:27:26,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:27:26,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:27:26,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:27:27,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:27:27,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:27:27,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:27:27,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:27:27,103 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:27:27,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2020-12-22 01:27:27,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd75164d7/24f14074508d4f1c87862d3c7a2f15cb/FLAG5eeba4084 [2020-12-22 01:27:28,178 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:27:28,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2020-12-22 01:27:28,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd75164d7/24f14074508d4f1c87862d3c7a2f15cb/FLAG5eeba4084 [2020-12-22 01:27:28,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd75164d7/24f14074508d4f1c87862d3c7a2f15cb [2020-12-22 01:27:28,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:27:28,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:27:28,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:27:28,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:27:28,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:27:28,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:27:28" (1/1) ... [2020-12-22 01:27:28,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dedced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:28, skipping insertion in model container [2020-12-22 01:27:28,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:27:28" (1/1) ... [2020-12-22 01:27:28,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:27:28,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:27:29,124 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c[3429,3442] [2020-12-22 01:27:30,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:27:30,143 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:27:30,185 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label30.c[3429,3442] [2020-12-22 01:27:30,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:27:30,893 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:27:30,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30 WrapperNode [2020-12-22 01:27:30,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:27:30,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:27:30,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:27:30,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:27:30,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:30,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:27:31,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:27:31,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:27:31,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:27:31,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:31,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... [2020-12-22 01:27:32,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:27:32,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:27:32,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:27:32,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:27:32,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:27:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:27:32,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:27:32,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:27:32,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:27:37,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:27:37,555 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:27:37,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:27:37 BoogieIcfgContainer [2020-12-22 01:27:37,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:27:37,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:27:37,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:27:37,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:27:37,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:27:28" (1/3) ... [2020-12-22 01:27:37,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef8ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:27:37, skipping insertion in model container [2020-12-22 01:27:37,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:27:30" (2/3) ... [2020-12-22 01:27:37,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef8ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:27:37, skipping insertion in model container [2020-12-22 01:27:37,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:27:37" (3/3) ... [2020-12-22 01:27:37,584 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2020-12-22 01:27:37,595 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:27:37,610 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:27:37,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:27:37,713 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:27:37,713 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:27:37,713 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:27:37,713 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:27:37,713 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:27:37,713 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:27:37,714 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:27:37,714 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:27:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2020-12-22 01:27:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 01:27:37,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:27:37,787 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] [2020-12-22 01:27:37,787 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:27:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:27:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2020-12-22 01:27:37,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:27:37,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450181241] [2020-12-22 01:27:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:27:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:27:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:27:38,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450181241] [2020-12-22 01:27:38,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:27:38,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:27:38,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802543215] [2020-12-22 01:27:38,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:27:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:27:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:27:38,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:38,123 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 3 states. [2020-12-22 01:27:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:27:44,493 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2020-12-22 01:27:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:27:44,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 01:27:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:27:44,533 INFO L225 Difference]: With dead ends: 2404 [2020-12-22 01:27:44,533 INFO L226 Difference]: Without dead ends: 1506 [2020-12-22 01:27:44,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-12-22 01:27:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2020-12-22 01:27:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-12-22 01:27:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2020-12-22 01:27:44,695 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 25 [2020-12-22 01:27:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:27:44,696 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2020-12-22 01:27:44,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:27:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2020-12-22 01:27:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 01:27:44,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:27:44,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:27:44,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:27:44,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:27:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:27:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash 778936309, now seen corresponding path program 1 times [2020-12-22 01:27:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:27:44,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837774232] [2020-12-22 01:27:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:27:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:27:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:27:44,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837774232] [2020-12-22 01:27:44,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:27:44,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:27:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513736371] [2020-12-22 01:27:44,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:27:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:27:44,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:27:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:44,960 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand 3 states. [2020-12-22 01:27:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:27:50,554 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2020-12-22 01:27:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:27:50,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 01:27:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:27:50,573 INFO L225 Difference]: With dead ends: 4512 [2020-12-22 01:27:50,574 INFO L226 Difference]: Without dead ends: 3008 [2020-12-22 01:27:50,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2020-12-22 01:27:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2020-12-22 01:27:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-12-22 01:27:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2020-12-22 01:27:50,655 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 100 [2020-12-22 01:27:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:27:50,656 INFO L481 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2020-12-22 01:27:50,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:27:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2020-12-22 01:27:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 01:27:50,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:27:50,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:27:50,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:27:50,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:27:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:27:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash 601923994, now seen corresponding path program 1 times [2020-12-22 01:27:50,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:27:50,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634251267] [2020-12-22 01:27:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:27:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:27:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:27:50,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634251267] [2020-12-22 01:27:50,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:27:50,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:27:50,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302472023] [2020-12-22 01:27:50,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:27:50,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:27:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:27:50,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:50,810 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand 3 states. [2020-12-22 01:27:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:27:56,635 INFO L93 Difference]: Finished difference Result 9020 states and 12767 transitions. [2020-12-22 01:27:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:27:56,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-12-22 01:27:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:27:56,669 INFO L225 Difference]: With dead ends: 9020 [2020-12-22 01:27:56,669 INFO L226 Difference]: Without dead ends: 6014 [2020-12-22 01:27:56,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2020-12-22 01:27:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 6012. [2020-12-22 01:27:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6012 states. [2020-12-22 01:27:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7785 transitions. [2020-12-22 01:27:56,816 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7785 transitions. Word has length 102 [2020-12-22 01:27:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:27:56,817 INFO L481 AbstractCegarLoop]: Abstraction has 6012 states and 7785 transitions. [2020-12-22 01:27:56,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:27:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7785 transitions. [2020-12-22 01:27:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 01:27:56,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:27:56,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:27:56,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:27:56,822 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:27:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:27:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash -888170950, now seen corresponding path program 1 times [2020-12-22 01:27:56,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:27:56,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951077994] [2020-12-22 01:27:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:27:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:27:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:27:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951077994] [2020-12-22 01:27:57,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:27:57,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:27:57,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144971516] [2020-12-22 01:27:57,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:27:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:27:57,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:27:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:27:57,105 INFO L87 Difference]: Start difference. First operand 6012 states and 7785 transitions. Second operand 3 states. [2020-12-22 01:28:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:04,048 INFO L93 Difference]: Finished difference Result 18030 states and 23350 transitions. [2020-12-22 01:28:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:28:04,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 01:28:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:04,108 INFO L225 Difference]: With dead ends: 18030 [2020-12-22 01:28:04,108 INFO L226 Difference]: Without dead ends: 12020 [2020-12-22 01:28:04,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2020-12-22 01:28:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 11269. [2020-12-22 01:28:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11269 states. [2020-12-22 01:28:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 14284 transitions. [2020-12-22 01:28:04,389 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 14284 transitions. Word has length 166 [2020-12-22 01:28:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:04,391 INFO L481 AbstractCegarLoop]: Abstraction has 11269 states and 14284 transitions. [2020-12-22 01:28:04,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:28:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 14284 transitions. [2020-12-22 01:28:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 01:28:04,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:04,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:04,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:28:04,397 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash 182160036, now seen corresponding path program 1 times [2020-12-22 01:28:04,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:04,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843031365] [2020-12-22 01:28:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:28:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843031365] [2020-12-22 01:28:05,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:28:05,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:28:05,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555986978] [2020-12-22 01:28:05,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:28:05,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:28:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:28:05,008 INFO L87 Difference]: Start difference. First operand 11269 states and 14284 transitions. Second operand 5 states. [2020-12-22 01:28:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:17,497 INFO L93 Difference]: Finished difference Result 29295 states and 36129 transitions. [2020-12-22 01:28:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:28:17,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-12-22 01:28:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:17,562 INFO L225 Difference]: With dead ends: 29295 [2020-12-22 01:28:17,563 INFO L226 Difference]: Without dead ends: 18028 [2020-12-22 01:28:17,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:28:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2020-12-22 01:28:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 16526. [2020-12-22 01:28:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16526 states. [2020-12-22 01:28:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19913 transitions. [2020-12-22 01:28:17,909 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19913 transitions. Word has length 169 [2020-12-22 01:28:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:17,910 INFO L481 AbstractCegarLoop]: Abstraction has 16526 states and 19913 transitions. [2020-12-22 01:28:17,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:28:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19913 transitions. [2020-12-22 01:28:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 01:28:17,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:17,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:17,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:28:17,913 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -807871100, now seen corresponding path program 1 times [2020-12-22 01:28:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14686589] [2020-12-22 01:28:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:28:18,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14686589] [2020-12-22 01:28:18,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:28:18,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:28:18,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914354863] [2020-12-22 01:28:18,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:28:18,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:28:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:18,074 INFO L87 Difference]: Start difference. First operand 16526 states and 19913 transitions. Second operand 3 states. [2020-12-22 01:28:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:25,243 INFO L93 Difference]: Finished difference Result 39058 states and 47606 transitions. [2020-12-22 01:28:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:28:25,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 01:28:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:25,305 INFO L225 Difference]: With dead ends: 39058 [2020-12-22 01:28:25,305 INFO L226 Difference]: Without dead ends: 22534 [2020-12-22 01:28:25,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2020-12-22 01:28:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2020-12-22 01:28:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22534 states. [2020-12-22 01:28:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27181 transitions. [2020-12-22 01:28:25,709 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27181 transitions. Word has length 170 [2020-12-22 01:28:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:25,710 INFO L481 AbstractCegarLoop]: Abstraction has 22534 states and 27181 transitions. [2020-12-22 01:28:25,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:28:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27181 transitions. [2020-12-22 01:28:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 01:28:25,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:25,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:25,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:28:25,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash -86656618, now seen corresponding path program 1 times [2020-12-22 01:28:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:25,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686703403] [2020-12-22 01:28:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:28:26,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686703403] [2020-12-22 01:28:26,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:28:26,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:28:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96402628] [2020-12-22 01:28:26,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:28:26,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:28:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:28:26,109 INFO L87 Difference]: Start difference. First operand 22534 states and 27181 transitions. Second operand 4 states. [2020-12-22 01:28:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:33,072 INFO L93 Difference]: Finished difference Result 50360 states and 60086 transitions. [2020-12-22 01:28:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:28:33,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2020-12-22 01:28:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:33,129 INFO L225 Difference]: With dead ends: 50360 [2020-12-22 01:28:33,130 INFO L226 Difference]: Without dead ends: 27791 [2020-12-22 01:28:33,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:28:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2020-12-22 01:28:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 27791. [2020-12-22 01:28:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27791 states. [2020-12-22 01:28:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 32519 transitions. [2020-12-22 01:28:33,559 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 32519 transitions. Word has length 240 [2020-12-22 01:28:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:33,560 INFO L481 AbstractCegarLoop]: Abstraction has 27791 states and 32519 transitions. [2020-12-22 01:28:33,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:28:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 32519 transitions. [2020-12-22 01:28:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-22 01:28:33,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:33,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:33,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:28:33,566 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1700665839, now seen corresponding path program 1 times [2020-12-22 01:28:33,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:33,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669129091] [2020-12-22 01:28:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-22 01:28:33,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669129091] [2020-12-22 01:28:33,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:28:33,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:28:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220973295] [2020-12-22 01:28:33,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:28:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:28:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:33,780 INFO L87 Difference]: Start difference. First operand 27791 states and 32519 transitions. Second operand 3 states. [2020-12-22 01:28:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:41,154 INFO L93 Difference]: Finished difference Result 72102 states and 85384 transitions. [2020-12-22 01:28:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:28:41,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2020-12-22 01:28:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:41,260 INFO L225 Difference]: With dead ends: 72102 [2020-12-22 01:28:41,260 INFO L226 Difference]: Without dead ends: 44313 [2020-12-22 01:28:41,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44313 states. [2020-12-22 01:28:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44313 to 40558. [2020-12-22 01:28:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40558 states. [2020-12-22 01:28:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 46528 transitions. [2020-12-22 01:28:42,504 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 46528 transitions. Word has length 302 [2020-12-22 01:28:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:42,505 INFO L481 AbstractCegarLoop]: Abstraction has 40558 states and 46528 transitions. [2020-12-22 01:28:42,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:28:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 46528 transitions. [2020-12-22 01:28:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-12-22 01:28:42,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:42,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:42,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:28:42,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1542873532, now seen corresponding path program 1 times [2020-12-22 01:28:42,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:42,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737520151] [2020-12-22 01:28:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-22 01:28:42,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737520151] [2020-12-22 01:28:42,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:28:42,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:28:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483870365] [2020-12-22 01:28:42,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:28:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:42,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:28:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:42,958 INFO L87 Difference]: Start difference. First operand 40558 states and 46528 transitions. Second operand 3 states. [2020-12-22 01:28:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:28:50,793 INFO L93 Difference]: Finished difference Result 97636 states and 113641 transitions. [2020-12-22 01:28:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:28:50,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-12-22 01:28:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:28:50,877 INFO L225 Difference]: With dead ends: 97636 [2020-12-22 01:28:50,877 INFO L226 Difference]: Without dead ends: 57080 [2020-12-22 01:28:50,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:28:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57080 states. [2020-12-22 01:28:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57080 to 56329. [2020-12-22 01:28:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56329 states. [2020-12-22 01:28:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56329 states to 56329 states and 64845 transitions. [2020-12-22 01:28:51,905 INFO L78 Accepts]: Start accepts. Automaton has 56329 states and 64845 transitions. Word has length 324 [2020-12-22 01:28:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:28:51,906 INFO L481 AbstractCegarLoop]: Abstraction has 56329 states and 64845 transitions. [2020-12-22 01:28:51,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:28:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 56329 states and 64845 transitions. [2020-12-22 01:28:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-22 01:28:51,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:28:51,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:28:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:28:51,915 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:28:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:28:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1041090181, now seen corresponding path program 1 times [2020-12-22 01:28:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:28:51,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087557831] [2020-12-22 01:28:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:28:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:28:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087557831] [2020-12-22 01:28:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643581323] [2020-12-22 01:28:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:28:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:28:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:28:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:28:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 01:28:53,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:28:53,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:28:53,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153337916] [2020-12-22 01:28:53,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:28:53,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:28:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:28:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:28:53,836 INFO L87 Difference]: Start difference. First operand 56329 states and 64845 transitions. Second operand 3 states. [2020-12-22 01:29:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:29:00,907 INFO L93 Difference]: Finished difference Result 132933 states and 151669 transitions. [2020-12-22 01:29:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:29:00,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-12-22 01:29:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:29:00,998 INFO L225 Difference]: With dead ends: 132933 [2020-12-22 01:29:00,998 INFO L226 Difference]: Without dead ends: 76606 [2020-12-22 01:29:01,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:29:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76606 states. [2020-12-22 01:29:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76606 to 71349. [2020-12-22 01:29:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71349 states. [2020-12-22 01:29:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71349 states to 71349 states and 80160 transitions. [2020-12-22 01:29:02,410 INFO L78 Accepts]: Start accepts. Automaton has 71349 states and 80160 transitions. Word has length 330 [2020-12-22 01:29:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:29:02,410 INFO L481 AbstractCegarLoop]: Abstraction has 71349 states and 80160 transitions. [2020-12-22 01:29:02,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:29:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71349 states and 80160 transitions. [2020-12-22 01:29:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-12-22 01:29:02,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:02,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:29:02,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 01:29:02,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1492233226, now seen corresponding path program 1 times [2020-12-22 01:29:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:02,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878303283] [2020-12-22 01:29:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-22 01:29:03,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878303283] [2020-12-22 01:29:03,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:29:03,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:29:03,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856957939] [2020-12-22 01:29:03,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:29:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:29:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:03,151 INFO L87 Difference]: Start difference. First operand 71349 states and 80160 transitions. Second operand 3 states. [2020-12-22 01:29:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:29:11,571 INFO L93 Difference]: Finished difference Result 168230 states and 191425 transitions. [2020-12-22 01:29:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:29:11,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 352 [2020-12-22 01:29:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:29:11,784 INFO L225 Difference]: With dead ends: 168230 [2020-12-22 01:29:11,784 INFO L226 Difference]: Without dead ends: 96883 [2020-12-22 01:29:11,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96883 states. [2020-12-22 01:29:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96883 to 95381. [2020-12-22 01:29:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95381 states. [2020-12-22 01:29:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95381 states to 95381 states and 108024 transitions. [2020-12-22 01:29:13,535 INFO L78 Accepts]: Start accepts. Automaton has 95381 states and 108024 transitions. Word has length 352 [2020-12-22 01:29:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:29:13,536 INFO L481 AbstractCegarLoop]: Abstraction has 95381 states and 108024 transitions. [2020-12-22 01:29:13,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:29:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 95381 states and 108024 transitions. [2020-12-22 01:29:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-12-22 01:29:13,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:13,543 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:29:13,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:29:13,544 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -733385364, now seen corresponding path program 1 times [2020-12-22 01:29:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:13,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407921485] [2020-12-22 01:29:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 01:29:14,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407921485] [2020-12-22 01:29:14,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:29:14,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:29:14,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044351611] [2020-12-22 01:29:14,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:29:14,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:29:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:14,153 INFO L87 Difference]: Start difference. First operand 95381 states and 108024 transitions. Second operand 3 states. [2020-12-22 01:29:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:29:22,864 INFO L93 Difference]: Finished difference Result 232816 states and 265546 transitions. [2020-12-22 01:29:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:29:22,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 356 [2020-12-22 01:29:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:29:23,035 INFO L225 Difference]: With dead ends: 232816 [2020-12-22 01:29:23,035 INFO L226 Difference]: Without dead ends: 132180 [2020-12-22 01:29:23,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132180 states. [2020-12-22 01:29:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132180 to 128425. [2020-12-22 01:29:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128425 states. [2020-12-22 01:29:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128425 states to 128425 states and 142743 transitions. [2020-12-22 01:29:25,253 INFO L78 Accepts]: Start accepts. Automaton has 128425 states and 142743 transitions. Word has length 356 [2020-12-22 01:29:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:29:25,255 INFO L481 AbstractCegarLoop]: Abstraction has 128425 states and 142743 transitions. [2020-12-22 01:29:25,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:29:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 128425 states and 142743 transitions. [2020-12-22 01:29:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-12-22 01:29:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:25,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:29:25,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:29:25,289 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1722659600, now seen corresponding path program 1 times [2020-12-22 01:29:25,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:25,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311918674] [2020-12-22 01:29:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-22 01:29:26,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311918674] [2020-12-22 01:29:26,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:29:26,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:29:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227182935] [2020-12-22 01:29:26,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:29:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:29:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:26,058 INFO L87 Difference]: Start difference. First operand 128425 states and 142743 transitions. Second operand 3 states. [2020-12-22 01:29:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:29:35,683 INFO L93 Difference]: Finished difference Result 287639 states and 320744 transitions. [2020-12-22 01:29:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:29:35,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 460 [2020-12-22 01:29:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:29:36,000 INFO L225 Difference]: With dead ends: 287639 [2020-12-22 01:29:36,001 INFO L226 Difference]: Without dead ends: 159216 [2020-12-22 01:29:36,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159216 states. [2020-12-22 01:29:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159216 to 152457. [2020-12-22 01:29:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152457 states. [2020-12-22 01:29:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152457 states to 152457 states and 167647 transitions. [2020-12-22 01:29:38,836 INFO L78 Accepts]: Start accepts. Automaton has 152457 states and 167647 transitions. Word has length 460 [2020-12-22 01:29:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:29:38,837 INFO L481 AbstractCegarLoop]: Abstraction has 152457 states and 167647 transitions. [2020-12-22 01:29:38,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:29:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 152457 states and 167647 transitions. [2020-12-22 01:29:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2020-12-22 01:29:38,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:38,902 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:29:38,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:29:38,902 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -404829369, now seen corresponding path program 1 times [2020-12-22 01:29:38,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:38,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061088975] [2020-12-22 01:29:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:29:41,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061088975] [2020-12-22 01:29:41,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:29:41,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 01:29:41,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746587430] [2020-12-22 01:29:41,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 01:29:41,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:41,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 01:29:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 01:29:41,964 INFO L87 Difference]: Start difference. First operand 152457 states and 167647 transitions. Second operand 8 states. [2020-12-22 01:30:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:14,001 INFO L93 Difference]: Finished difference Result 367320 states and 402738 transitions. [2020-12-22 01:30:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 01:30:14,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 769 [2020-12-22 01:30:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:14,278 INFO L225 Difference]: With dead ends: 367320 [2020-12-22 01:30:14,278 INFO L226 Difference]: Without dead ends: 214865 [2020-12-22 01:30:14,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-22 01:30:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214865 states. [2020-12-22 01:30:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214865 to 204948. [2020-12-22 01:30:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204948 states. [2020-12-22 01:30:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204948 states to 204948 states and 224751 transitions. [2020-12-22 01:30:17,988 INFO L78 Accepts]: Start accepts. Automaton has 204948 states and 224751 transitions. Word has length 769 [2020-12-22 01:30:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:17,990 INFO L481 AbstractCegarLoop]: Abstraction has 204948 states and 224751 transitions. [2020-12-22 01:30:17,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 01:30:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 204948 states and 224751 transitions. [2020-12-22 01:30:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2020-12-22 01:30:18,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:18,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:18,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:30:18,073 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1194585177, now seen corresponding path program 1 times [2020-12-22 01:30:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:18,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708955544] [2020-12-22 01:30:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 01:30:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708955544] [2020-12-22 01:30:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:30:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773563231] [2020-12-22 01:30:19,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:19,167 INFO L87 Difference]: Start difference. First operand 204948 states and 224751 transitions. Second operand 3 states. [2020-12-22 01:30:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:29,415 INFO L93 Difference]: Finished difference Result 422779 states and 463054 transitions. [2020-12-22 01:30:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:29,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 792 [2020-12-22 01:30:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:29,778 INFO L225 Difference]: With dead ends: 422779 [2020-12-22 01:30:29,778 INFO L226 Difference]: Without dead ends: 215043 [2020-12-22 01:30:29,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215043 states. [2020-12-22 01:30:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215043 to 209468. [2020-12-22 01:30:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209468 states. [2020-12-22 01:30:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209468 states to 209468 states and 229021 transitions. [2020-12-22 01:30:33,846 INFO L78 Accepts]: Start accepts. Automaton has 209468 states and 229021 transitions. Word has length 792 [2020-12-22 01:30:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:33,847 INFO L481 AbstractCegarLoop]: Abstraction has 209468 states and 229021 transitions. [2020-12-22 01:30:33,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 209468 states and 229021 transitions. [2020-12-22 01:30:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-12-22 01:30:34,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:34,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:34,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 01:30:34,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:34,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1511113437, now seen corresponding path program 1 times [2020-12-22 01:30:34,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:34,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785247451] [2020-12-22 01:30:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 333 proven. 143 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 01:30:36,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785247451] [2020-12-22 01:30:36,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507012313] [2020-12-22 01:30:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:30:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 01:30:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:30:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 422 proven. 54 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 01:30:40,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 01:30:40,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-22 01:30:40,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112237782] [2020-12-22 01:30:40,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 01:30:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 01:30:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 01:30:40,267 INFO L87 Difference]: Start difference. First operand 209468 states and 229021 transitions. Second operand 9 states.