/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/systemc/token_ring.05.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:08:22,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:08:22,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:08:22,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:08:22,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:08:22,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:08:22,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:08:22,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:08:22,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:08:22,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:08:22,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:08:22,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:08:22,914 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:08:22,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:08:22,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:08:22,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:08:22,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:08:22,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:08:22,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:08:22,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:08:22,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:08:22,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:08:22,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:08:22,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:08:22,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:08:22,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:08:22,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:08:22,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:08:22,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:08:22,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:08:22,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:08:22,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:08:22,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:08:22,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:08:23,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:08:23,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:08:23,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:08:23,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:08:23,403 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:08:23,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2020-12-22 07:08:23,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80034cb8/0a68b560d65c4a868904745a3966b84c/FLAG209878a8a [2020-12-22 07:08:24,130 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:08:24,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2020-12-22 07:08:24,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80034cb8/0a68b560d65c4a868904745a3966b84c/FLAG209878a8a [2020-12-22 07:08:24,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80034cb8/0a68b560d65c4a868904745a3966b84c [2020-12-22 07:08:24,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:08:24,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:08:24,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:24,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:08:24,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:08:24,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d77f966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24, skipping insertion in model container [2020-12-22 07:08:24,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:08:24,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:08:24,625 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/systemc/token_ring.05.cil-1.c[366,379] [2020-12-22 07:08:24,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:24,749 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:08:24,764 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/systemc/token_ring.05.cil-1.c[366,379] [2020-12-22 07:08:24,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:24,848 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:08:24,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24 WrapperNode [2020-12-22 07:08:24,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:24,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:24,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:08:24,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:08:24,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:25,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:08:25,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:08:25,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:08:25,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:25,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:08:25,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:08:25,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:08:25,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:08:25,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:08:25,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:08:25,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:08:25,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:08:25,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:08:26,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:08:26,603 INFO L299 CfgBuilder]: Removed 196 assume(true) statements. [2020-12-22 07:08:26,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:26 BoogieIcfgContainer [2020-12-22 07:08:26,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:08:26,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:08:26,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:08:26,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:08:26,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:08:24" (1/3) ... [2020-12-22 07:08:26,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8894c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:26, skipping insertion in model container [2020-12-22 07:08:26,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (2/3) ... [2020-12-22 07:08:26,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8894c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:26, skipping insertion in model container [2020-12-22 07:08:26,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:26" (3/3) ... [2020-12-22 07:08:26,616 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2020-12-22 07:08:26,623 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:08:26,629 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:08:26,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:08:26,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:08:26,686 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:08:26,686 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:08:26,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:08:26,687 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:08:26,687 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:08:26,687 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:08:26,687 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:08:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states. [2020-12-22 07:08:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:26,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:26,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:26,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash -967631064, now seen corresponding path program 1 times [2020-12-22 07:08:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:26,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039114830] [2020-12-22 07:08:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039114830] [2020-12-22 07:08:27,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995640013] [2020-12-22 07:08:27,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,089 INFO L87 Difference]: Start difference. First operand 533 states. Second operand 3 states. [2020-12-22 07:08:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,207 INFO L93 Difference]: Finished difference Result 1061 states and 1639 transitions. [2020-12-22 07:08:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:27,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,230 INFO L225 Difference]: With dead ends: 1061 [2020-12-22 07:08:27,230 INFO L226 Difference]: Without dead ends: 529 [2020-12-22 07:08:27,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-12-22 07:08:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2020-12-22 07:08:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-12-22 07:08:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 801 transitions. [2020-12-22 07:08:27,402 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 801 transitions. Word has length 83 [2020-12-22 07:08:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,403 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 801 transitions. [2020-12-22 07:08:27,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 801 transitions. [2020-12-22 07:08:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:27,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:27,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:08:27,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1207870810, now seen corresponding path program 1 times [2020-12-22 07:08:27,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147963632] [2020-12-22 07:08:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147963632] [2020-12-22 07:08:27,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:27,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939807315] [2020-12-22 07:08:27,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,608 INFO L87 Difference]: Start difference. First operand 529 states and 801 transitions. Second operand 3 states. [2020-12-22 07:08:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,680 INFO L93 Difference]: Finished difference Result 1459 states and 2203 transitions. [2020-12-22 07:08:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:27,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,688 INFO L225 Difference]: With dead ends: 1459 [2020-12-22 07:08:27,688 INFO L226 Difference]: Without dead ends: 940 [2020-12-22 07:08:27,691 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 07:08:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-12-22 07:08:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 938. [2020-12-22 07:08:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1413 transitions. [2020-12-22 07:08:27,742 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1413 transitions. Word has length 83 [2020-12-22 07:08:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,743 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1413 transitions. [2020-12-22 07:08:27,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1413 transitions. [2020-12-22 07:08:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:27,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:27,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:08:27,746 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -258608350, now seen corresponding path program 1 times [2020-12-22 07:08:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697177289] [2020-12-22 07:08:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697177289] [2020-12-22 07:08:27,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142796315] [2020-12-22 07:08:27,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:27,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:27,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:27,819 INFO L87 Difference]: Start difference. First operand 938 states and 1413 transitions. Second operand 4 states. [2020-12-22 07:08:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,933 INFO L93 Difference]: Finished difference Result 2275 states and 3422 transitions. [2020-12-22 07:08:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:27,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,941 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 07:08:27,942 INFO L226 Difference]: Without dead ends: 1348 [2020-12-22 07:08:27,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2020-12-22 07:08:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 938. [2020-12-22 07:08:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1410 transitions. [2020-12-22 07:08:27,995 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1410 transitions. Word has length 83 [2020-12-22 07:08:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,995 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1410 transitions. [2020-12-22 07:08:27,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1410 transitions. [2020-12-22 07:08:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:27,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:27,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:08:27,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2125316388, now seen corresponding path program 1 times [2020-12-22 07:08:27,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680546127] [2020-12-22 07:08:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680546127] [2020-12-22 07:08:28,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715707396] [2020-12-22 07:08:28,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:28,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:28,096 INFO L87 Difference]: Start difference. First operand 938 states and 1410 transitions. Second operand 4 states. [2020-12-22 07:08:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,220 INFO L93 Difference]: Finished difference Result 2273 states and 3412 transitions. [2020-12-22 07:08:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:28,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,228 INFO L225 Difference]: With dead ends: 2273 [2020-12-22 07:08:28,228 INFO L226 Difference]: Without dead ends: 1347 [2020-12-22 07:08:28,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2020-12-22 07:08:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 938. [2020-12-22 07:08:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1407 transitions. [2020-12-22 07:08:28,285 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1407 transitions. Word has length 83 [2020-12-22 07:08:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,294 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1407 transitions. [2020-12-22 07:08:28,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1407 transitions. [2020-12-22 07:08:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:28,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:28,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:08:28,296 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2092750110, now seen corresponding path program 1 times [2020-12-22 07:08:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041397788] [2020-12-22 07:08:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041397788] [2020-12-22 07:08:28,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:28,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446733455] [2020-12-22 07:08:28,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:28,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,354 INFO L87 Difference]: Start difference. First operand 938 states and 1407 transitions. Second operand 3 states. [2020-12-22 07:08:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,420 INFO L93 Difference]: Finished difference Result 1862 states and 2793 transitions. [2020-12-22 07:08:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:28,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,426 INFO L225 Difference]: With dead ends: 1862 [2020-12-22 07:08:28,426 INFO L226 Difference]: Without dead ends: 938 [2020-12-22 07:08:28,428 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 07:08:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-22 07:08:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-22 07:08:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1399 transitions. [2020-12-22 07:08:28,482 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1399 transitions. Word has length 83 [2020-12-22 07:08:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,483 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1399 transitions. [2020-12-22 07:08:28,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1399 transitions. [2020-12-22 07:08:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:28,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:08:28,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash 34562398, now seen corresponding path program 1 times [2020-12-22 07:08:28,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965782337] [2020-12-22 07:08:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965782337] [2020-12-22 07:08:28,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809330085] [2020-12-22 07:08:28,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:28,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,556 INFO L87 Difference]: Start difference. First operand 938 states and 1399 transitions. Second operand 3 states. [2020-12-22 07:08:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,658 INFO L93 Difference]: Finished difference Result 1861 states and 2776 transitions. [2020-12-22 07:08:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:28,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,663 INFO L225 Difference]: With dead ends: 1861 [2020-12-22 07:08:28,664 INFO L226 Difference]: Without dead ends: 938 [2020-12-22 07:08:28,666 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 07:08:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-22 07:08:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-22 07:08:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1391 transitions. [2020-12-22 07:08:28,721 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1391 transitions. Word has length 83 [2020-12-22 07:08:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,722 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1391 transitions. [2020-12-22 07:08:28,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1391 transitions. [2020-12-22 07:08:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:28,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:28,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:08:28,724 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash -458063776, now seen corresponding path program 1 times [2020-12-22 07:08:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080486353] [2020-12-22 07:08:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080486353] [2020-12-22 07:08:28,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:28,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655135736] [2020-12-22 07:08:28,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:28,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:28,808 INFO L87 Difference]: Start difference. First operand 938 states and 1391 transitions. Second operand 4 states. [2020-12-22 07:08:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,984 INFO L93 Difference]: Finished difference Result 2223 states and 3296 transitions. [2020-12-22 07:08:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:28,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,991 INFO L225 Difference]: With dead ends: 2223 [2020-12-22 07:08:28,991 INFO L226 Difference]: Without dead ends: 1301 [2020-12-22 07:08:28,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-12-22 07:08:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 938. [2020-12-22 07:08:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1388 transitions. [2020-12-22 07:08:29,054 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1388 transitions. Word has length 83 [2020-12-22 07:08:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,055 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1388 transitions. [2020-12-22 07:08:29,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1388 transitions. [2020-12-22 07:08:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:29,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:29,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:08:29,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash 495876382, now seen corresponding path program 1 times [2020-12-22 07:08:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545891504] [2020-12-22 07:08:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545891504] [2020-12-22 07:08:29,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:29,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664866619] [2020-12-22 07:08:29,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:29,110 INFO L87 Difference]: Start difference. First operand 938 states and 1388 transitions. Second operand 4 states. [2020-12-22 07:08:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:29,329 INFO L93 Difference]: Finished difference Result 2221 states and 3286 transitions. [2020-12-22 07:08:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:29,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:29,337 INFO L225 Difference]: With dead ends: 2221 [2020-12-22 07:08:29,337 INFO L226 Difference]: Without dead ends: 1300 [2020-12-22 07:08:29,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2020-12-22 07:08:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 938. [2020-12-22 07:08:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1385 transitions. [2020-12-22 07:08:29,433 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1385 transitions. Word has length 83 [2020-12-22 07:08:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1385 transitions. [2020-12-22 07:08:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1385 transitions. [2020-12-22 07:08:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:29,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:29,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:08:29,435 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -720277344, now seen corresponding path program 1 times [2020-12-22 07:08:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197156570] [2020-12-22 07:08:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197156570] [2020-12-22 07:08:29,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:29,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994252698] [2020-12-22 07:08:29,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:29,527 INFO L87 Difference]: Start difference. First operand 938 states and 1385 transitions. Second operand 3 states. [2020-12-22 07:08:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:29,644 INFO L93 Difference]: Finished difference Result 1858 states and 2745 transitions. [2020-12-22 07:08:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:29,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:29,650 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 07:08:29,650 INFO L226 Difference]: Without dead ends: 938 [2020-12-22 07:08:29,652 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 07:08:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-22 07:08:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-22 07:08:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1363 transitions. [2020-12-22 07:08:29,718 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1363 transitions. Word has length 83 [2020-12-22 07:08:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,722 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1363 transitions. [2020-12-22 07:08:29,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1363 transitions. [2020-12-22 07:08:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:29,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:08:29,727 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1978186147, now seen corresponding path program 1 times [2020-12-22 07:08:29,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548827645] [2020-12-22 07:08:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548827645] [2020-12-22 07:08:29,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682846052] [2020-12-22 07:08:29,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:29,829 INFO L87 Difference]: Start difference. First operand 938 states and 1363 transitions. Second operand 4 states. [2020-12-22 07:08:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,076 INFO L93 Difference]: Finished difference Result 2217 states and 3222 transitions. [2020-12-22 07:08:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:30,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,085 INFO L225 Difference]: With dead ends: 2217 [2020-12-22 07:08:30,086 INFO L226 Difference]: Without dead ends: 1298 [2020-12-22 07:08:30,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-12-22 07:08:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 938. [2020-12-22 07:08:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1360 transitions. [2020-12-22 07:08:30,173 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1360 transitions. Word has length 83 [2020-12-22 07:08:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:30,175 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1360 transitions. [2020-12-22 07:08:30,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1360 transitions. [2020-12-22 07:08:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:30,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:30,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:08:30,176 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash 630601311, now seen corresponding path program 1 times [2020-12-22 07:08:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:30,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995758266] [2020-12-22 07:08:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:30,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995758266] [2020-12-22 07:08:30,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:30,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784167287] [2020-12-22 07:08:30,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:30,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:30,244 INFO L87 Difference]: Start difference. First operand 938 states and 1360 transitions. Second operand 4 states. [2020-12-22 07:08:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,481 INFO L93 Difference]: Finished difference Result 2215 states and 3212 transitions. [2020-12-22 07:08:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:30,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:08:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,489 INFO L225 Difference]: With dead ends: 2215 [2020-12-22 07:08:30,489 INFO L226 Difference]: Without dead ends: 1297 [2020-12-22 07:08:30,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-12-22 07:08:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 938. [2020-12-22 07:08:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:08:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1357 transitions. [2020-12-22 07:08:30,589 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1357 transitions. Word has length 83 [2020-12-22 07:08:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:30,591 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1357 transitions. [2020-12-22 07:08:30,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1357 transitions. [2020-12-22 07:08:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:08:30,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:30,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:08:30,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:08:30,593 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash 576208413, now seen corresponding path program 1 times [2020-12-22 07:08:30,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:30,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083004885] [2020-12-22 07:08:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:30,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083004885] [2020-12-22 07:08:30,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:30,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:30,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931310768] [2020-12-22 07:08:30,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:30,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:30,643 INFO L87 Difference]: Start difference. First operand 938 states and 1357 transitions. Second operand 3 states. [2020-12-22 07:08:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,815 INFO L93 Difference]: Finished difference Result 2694 states and 3892 transitions. [2020-12-22 07:08:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:30,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:08:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,826 INFO L225 Difference]: With dead ends: 2694 [2020-12-22 07:08:30,826 INFO L226 Difference]: Without dead ends: 1779 [2020-12-22 07:08:30,829 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 07:08:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-12-22 07:08:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1699. [2020-12-22 07:08:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-12-22 07:08:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2438 transitions. [2020-12-22 07:08:30,959 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2438 transitions. Word has length 83 [2020-12-22 07:08:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:30,959 INFO L481 AbstractCegarLoop]: Abstraction has 1699 states and 2438 transitions. [2020-12-22 07:08:30,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2438 transitions. [2020-12-22 07:08:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:30,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:30,962 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:30,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:08:30,963 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1635851910, now seen corresponding path program 1 times [2020-12-22 07:08:30,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:30,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912626759] [2020-12-22 07:08:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:31,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912626759] [2020-12-22 07:08:31,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:31,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:31,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276673417] [2020-12-22 07:08:31,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:31,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:31,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:31,030 INFO L87 Difference]: Start difference. First operand 1699 states and 2438 transitions. Second operand 5 states. [2020-12-22 07:08:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:31,426 INFO L93 Difference]: Finished difference Result 4970 states and 7139 transitions. [2020-12-22 07:08:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:31,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:31,443 INFO L225 Difference]: With dead ends: 4970 [2020-12-22 07:08:31,443 INFO L226 Difference]: Without dead ends: 3298 [2020-12-22 07:08:31,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2020-12-22 07:08:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 1744. [2020-12-22 07:08:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2020-12-22 07:08:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2469 transitions. [2020-12-22 07:08:31,634 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2469 transitions. Word has length 135 [2020-12-22 07:08:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:31,634 INFO L481 AbstractCegarLoop]: Abstraction has 1744 states and 2469 transitions. [2020-12-22 07:08:31,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2469 transitions. [2020-12-22 07:08:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:31,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:31,637 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:31,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:08:31,638 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1605012094, now seen corresponding path program 1 times [2020-12-22 07:08:31,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:31,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014828413] [2020-12-22 07:08:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:31,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014828413] [2020-12-22 07:08:31,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:31,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:31,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101135694] [2020-12-22 07:08:31,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:31,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:31,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:31,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:31,696 INFO L87 Difference]: Start difference. First operand 1744 states and 2469 transitions. Second operand 5 states. [2020-12-22 07:08:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:32,125 INFO L93 Difference]: Finished difference Result 4571 states and 6467 transitions. [2020-12-22 07:08:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:32,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:32,146 INFO L225 Difference]: With dead ends: 4571 [2020-12-22 07:08:32,147 INFO L226 Difference]: Without dead ends: 2868 [2020-12-22 07:08:32,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2020-12-22 07:08:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1756. [2020-12-22 07:08:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1756 states. [2020-12-22 07:08:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2456 transitions. [2020-12-22 07:08:32,400 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2456 transitions. Word has length 135 [2020-12-22 07:08:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:32,400 INFO L481 AbstractCegarLoop]: Abstraction has 1756 states and 2456 transitions. [2020-12-22 07:08:32,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2456 transitions. [2020-12-22 07:08:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:32,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:32,403 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:32,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:08:32,404 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash -429352574, now seen corresponding path program 1 times [2020-12-22 07:08:32,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:32,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103937492] [2020-12-22 07:08:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103937492] [2020-12-22 07:08:32,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:32,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:32,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065718249] [2020-12-22 07:08:32,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:32,484 INFO L87 Difference]: Start difference. First operand 1756 states and 2456 transitions. Second operand 5 states. [2020-12-22 07:08:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:32,995 INFO L93 Difference]: Finished difference Result 5997 states and 8451 transitions. [2020-12-22 07:08:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:32,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,016 INFO L225 Difference]: With dead ends: 5997 [2020-12-22 07:08:33,016 INFO L226 Difference]: Without dead ends: 4289 [2020-12-22 07:08:33,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2020-12-22 07:08:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 1843. [2020-12-22 07:08:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-12-22 07:08:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2543 transitions. [2020-12-22 07:08:33,210 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2543 transitions. Word has length 135 [2020-12-22 07:08:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:33,212 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2543 transitions. [2020-12-22 07:08:33,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2543 transitions. [2020-12-22 07:08:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:33,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:33,215 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:33,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:08:33,215 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1925032708, now seen corresponding path program 1 times [2020-12-22 07:08:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:33,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760068150] [2020-12-22 07:08:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:33,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760068150] [2020-12-22 07:08:33,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:33,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661193406] [2020-12-22 07:08:33,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:33,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:33,305 INFO L87 Difference]: Start difference. First operand 1843 states and 2543 transitions. Second operand 4 states. [2020-12-22 07:08:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:33,814 INFO L93 Difference]: Finished difference Result 6024 states and 8299 transitions. [2020-12-22 07:08:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:33,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,853 INFO L225 Difference]: With dead ends: 6024 [2020-12-22 07:08:33,853 INFO L226 Difference]: Without dead ends: 4234 [2020-12-22 07:08:33,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2020-12-22 07:08:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 3386. [2020-12-22 07:08:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3386 states. [2020-12-22 07:08:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4647 transitions. [2020-12-22 07:08:34,225 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4647 transitions. Word has length 135 [2020-12-22 07:08:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 3386 states and 4647 transitions. [2020-12-22 07:08:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4647 transitions. [2020-12-22 07:08:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,230 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:08:34,230 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash 538351429, now seen corresponding path program 1 times [2020-12-22 07:08:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291975791] [2020-12-22 07:08:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:34,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291975791] [2020-12-22 07:08:34,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:34,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:34,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875664049] [2020-12-22 07:08:34,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:34,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:34,282 INFO L87 Difference]: Start difference. First operand 3386 states and 4647 transitions. Second operand 5 states. [2020-12-22 07:08:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,964 INFO L93 Difference]: Finished difference Result 9081 states and 12543 transitions. [2020-12-22 07:08:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:34,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:35,013 INFO L225 Difference]: With dead ends: 9081 [2020-12-22 07:08:35,013 INFO L226 Difference]: Without dead ends: 5752 [2020-12-22 07:08:35,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2020-12-22 07:08:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 3470. [2020-12-22 07:08:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2020-12-22 07:08:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 4706 transitions. [2020-12-22 07:08:35,342 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 4706 transitions. Word has length 135 [2020-12-22 07:08:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:35,343 INFO L481 AbstractCegarLoop]: Abstraction has 3470 states and 4706 transitions. [2020-12-22 07:08:35,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 4706 transitions. [2020-12-22 07:08:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:35,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:35,347 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:35,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:08:35,347 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1880133049, now seen corresponding path program 1 times [2020-12-22 07:08:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:35,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433758535] [2020-12-22 07:08:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:35,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433758535] [2020-12-22 07:08:35,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735704452] [2020-12-22 07:08:35,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:35,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:35,402 INFO L87 Difference]: Start difference. First operand 3470 states and 4706 transitions. Second operand 5 states. [2020-12-22 07:08:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:36,315 INFO L93 Difference]: Finished difference Result 11099 states and 15185 transitions. [2020-12-22 07:08:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:36,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:36,331 INFO L225 Difference]: With dead ends: 11099 [2020-12-22 07:08:36,332 INFO L226 Difference]: Without dead ends: 7693 [2020-12-22 07:08:36,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2020-12-22 07:08:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 3629. [2020-12-22 07:08:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-22 07:08:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4865 transitions. [2020-12-22 07:08:36,806 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4865 transitions. Word has length 135 [2020-12-22 07:08:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:36,807 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4865 transitions. [2020-12-22 07:08:36,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4865 transitions. [2020-12-22 07:08:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:36,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:36,811 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:36,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:08:36,811 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1639893303, now seen corresponding path program 1 times [2020-12-22 07:08:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105787200] [2020-12-22 07:08:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:36,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105787200] [2020-12-22 07:08:36,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:36,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192676909] [2020-12-22 07:08:36,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:36,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:36,905 INFO L87 Difference]: Start difference. First operand 3629 states and 4865 transitions. Second operand 4 states. [2020-12-22 07:08:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:37,593 INFO L93 Difference]: Finished difference Result 8819 states and 11814 transitions. [2020-12-22 07:08:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:37,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:37,605 INFO L225 Difference]: With dead ends: 8819 [2020-12-22 07:08:37,605 INFO L226 Difference]: Without dead ends: 5259 [2020-12-22 07:08:37,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-12-22 07:08:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 3629. [2020-12-22 07:08:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-22 07:08:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4848 transitions. [2020-12-22 07:08:37,987 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4848 transitions. Word has length 135 [2020-12-22 07:08:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:37,988 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4848 transitions. [2020-12-22 07:08:37,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4848 transitions. [2020-12-22 07:08:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:37,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:37,991 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:37,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:08:37,992 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1612827701, now seen corresponding path program 1 times [2020-12-22 07:08:37,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:37,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312919921] [2020-12-22 07:08:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:38,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312919921] [2020-12-22 07:08:38,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:38,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363905175] [2020-12-22 07:08:38,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:38,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:38,045 INFO L87 Difference]: Start difference. First operand 3629 states and 4848 transitions. Second operand 4 states. [2020-12-22 07:08:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:38,639 INFO L93 Difference]: Finished difference Result 8818 states and 11775 transitions. [2020-12-22 07:08:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:38,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:38,652 INFO L225 Difference]: With dead ends: 8818 [2020-12-22 07:08:38,652 INFO L226 Difference]: Without dead ends: 5259 [2020-12-22 07:08:38,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-12-22 07:08:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 3629. [2020-12-22 07:08:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-22 07:08:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4831 transitions. [2020-12-22 07:08:39,003 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4831 transitions. Word has length 135 [2020-12-22 07:08:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:39,003 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4831 transitions. [2020-12-22 07:08:39,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4831 transitions. [2020-12-22 07:08:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:39,007 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:39,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:08:39,008 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 604802697, now seen corresponding path program 1 times [2020-12-22 07:08:39,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:39,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115475506] [2020-12-22 07:08:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:39,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115475506] [2020-12-22 07:08:39,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:39,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:39,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623386622] [2020-12-22 07:08:39,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:39,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:39,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:39,098 INFO L87 Difference]: Start difference. First operand 3629 states and 4831 transitions. Second operand 4 states. [2020-12-22 07:08:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:39,752 INFO L93 Difference]: Finished difference Result 9379 states and 12439 transitions. [2020-12-22 07:08:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:39,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:39,769 INFO L225 Difference]: With dead ends: 9379 [2020-12-22 07:08:39,770 INFO L226 Difference]: Without dead ends: 5821 [2020-12-22 07:08:39,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-12-22 07:08:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 4183. [2020-12-22 07:08:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4183 states. [2020-12-22 07:08:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 5504 transitions. [2020-12-22 07:08:40,263 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 5504 transitions. Word has length 135 [2020-12-22 07:08:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:40,263 INFO L481 AbstractCegarLoop]: Abstraction has 4183 states and 5504 transitions. [2020-12-22 07:08:40,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 5504 transitions. [2020-12-22 07:08:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:40,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:40,267 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:40,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:08:40,268 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1956060149, now seen corresponding path program 1 times [2020-12-22 07:08:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:40,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594913532] [2020-12-22 07:08:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:40,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594913532] [2020-12-22 07:08:40,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:40,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:40,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444044584] [2020-12-22 07:08:40,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:40,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:40,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:40,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:40,339 INFO L87 Difference]: Start difference. First operand 4183 states and 5504 transitions. Second operand 4 states. [2020-12-22 07:08:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:40,952 INFO L93 Difference]: Finished difference Result 9977 states and 13131 transitions. [2020-12-22 07:08:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:40,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:41,005 INFO L225 Difference]: With dead ends: 9977 [2020-12-22 07:08:41,005 INFO L226 Difference]: Without dead ends: 5926 [2020-12-22 07:08:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2020-12-22 07:08:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4099. [2020-12-22 07:08:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2020-12-22 07:08:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5347 transitions. [2020-12-22 07:08:41,439 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5347 transitions. Word has length 135 [2020-12-22 07:08:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:41,439 INFO L481 AbstractCegarLoop]: Abstraction has 4099 states and 5347 transitions. [2020-12-22 07:08:41,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5347 transitions. [2020-12-22 07:08:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:41,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:41,443 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:41,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:08:41,443 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1879159351, now seen corresponding path program 1 times [2020-12-22 07:08:41,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:41,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421151067] [2020-12-22 07:08:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:41,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421151067] [2020-12-22 07:08:41,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:41,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:41,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677851744] [2020-12-22 07:08:41,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:41,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:41,503 INFO L87 Difference]: Start difference. First operand 4099 states and 5347 transitions. Second operand 4 states. [2020-12-22 07:08:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:42,031 INFO L93 Difference]: Finished difference Result 9166 states and 11944 transitions. [2020-12-22 07:08:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:42,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:42,041 INFO L225 Difference]: With dead ends: 9166 [2020-12-22 07:08:42,041 INFO L226 Difference]: Without dead ends: 5116 [2020-12-22 07:08:42,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2020-12-22 07:08:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 4099. [2020-12-22 07:08:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2020-12-22 07:08:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5272 transitions. [2020-12-22 07:08:42,673 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5272 transitions. Word has length 135 [2020-12-22 07:08:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:42,674 INFO L481 AbstractCegarLoop]: Abstraction has 4099 states and 5272 transitions. [2020-12-22 07:08:42,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5272 transitions. [2020-12-22 07:08:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:42,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:42,680 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:42,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:08:42,680 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1448457291, now seen corresponding path program 1 times [2020-12-22 07:08:42,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:42,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540747342] [2020-12-22 07:08:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:42,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540747342] [2020-12-22 07:08:42,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:42,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491802626] [2020-12-22 07:08:42,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:42,813 INFO L87 Difference]: Start difference. First operand 4099 states and 5272 transitions. Second operand 4 states. [2020-12-22 07:08:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:43,779 INFO L93 Difference]: Finished difference Result 9710 states and 12481 transitions. [2020-12-22 07:08:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:43,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:43,790 INFO L225 Difference]: With dead ends: 9710 [2020-12-22 07:08:43,790 INFO L226 Difference]: Without dead ends: 5694 [2020-12-22 07:08:43,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2020-12-22 07:08:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 3937. [2020-12-22 07:08:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3937 states. [2020-12-22 07:08:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 4985 transitions. [2020-12-22 07:08:44,154 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 4985 transitions. Word has length 135 [2020-12-22 07:08:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:44,154 INFO L481 AbstractCegarLoop]: Abstraction has 3937 states and 4985 transitions. [2020-12-22 07:08:44,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 4985 transitions. [2020-12-22 07:08:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:44,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:44,157 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:44,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:08:44,157 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1586087216, now seen corresponding path program 1 times [2020-12-22 07:08:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:44,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493125385] [2020-12-22 07:08:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:44,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493125385] [2020-12-22 07:08:44,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:44,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:44,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612459639] [2020-12-22 07:08:44,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:44,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:44,226 INFO L87 Difference]: Start difference. First operand 3937 states and 4985 transitions. Second operand 4 states. [2020-12-22 07:08:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:44,839 INFO L93 Difference]: Finished difference Result 9250 states and 11734 transitions. [2020-12-22 07:08:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:44,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:44,848 INFO L225 Difference]: With dead ends: 9250 [2020-12-22 07:08:44,848 INFO L226 Difference]: Without dead ends: 5443 [2020-12-22 07:08:44,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2020-12-22 07:08:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 3853. [2020-12-22 07:08:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3853 states. [2020-12-22 07:08:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 4828 transitions. [2020-12-22 07:08:45,324 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 4828 transitions. Word has length 135 [2020-12-22 07:08:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:45,324 INFO L481 AbstractCegarLoop]: Abstraction has 3853 states and 4828 transitions. [2020-12-22 07:08:45,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 4828 transitions. [2020-12-22 07:08:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:45,328 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:45,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:08:45,328 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash -632147058, now seen corresponding path program 1 times [2020-12-22 07:08:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:45,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15402252] [2020-12-22 07:08:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:45,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15402252] [2020-12-22 07:08:45,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:45,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:45,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715428748] [2020-12-22 07:08:45,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:45,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:45,407 INFO L87 Difference]: Start difference. First operand 3853 states and 4828 transitions. Second operand 4 states. [2020-12-22 07:08:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:46,103 INFO L93 Difference]: Finished difference Result 9962 states and 12408 transitions. [2020-12-22 07:08:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:46,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:08:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:46,110 INFO L225 Difference]: With dead ends: 9962 [2020-12-22 07:08:46,110 INFO L226 Difference]: Without dead ends: 6218 [2020-12-22 07:08:46,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2020-12-22 07:08:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 4613. [2020-12-22 07:08:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-22 07:08:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5623 transitions. [2020-12-22 07:08:46,514 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5623 transitions. Word has length 135 [2020-12-22 07:08:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:46,515 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 5623 transitions. [2020-12-22 07:08:46,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5623 transitions. [2020-12-22 07:08:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:46,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:46,518 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:46,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:08:46,519 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1537703699, now seen corresponding path program 1 times [2020-12-22 07:08:46,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458982238] [2020-12-22 07:08:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:46,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458982238] [2020-12-22 07:08:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380389398] [2020-12-22 07:08:46,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:46,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:46,576 INFO L87 Difference]: Start difference. First operand 4613 states and 5623 transitions. Second operand 5 states. [2020-12-22 07:08:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:47,136 INFO L93 Difference]: Finished difference Result 10307 states and 12667 transitions. [2020-12-22 07:08:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:47,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 07:08:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:47,143 INFO L225 Difference]: With dead ends: 10307 [2020-12-22 07:08:47,143 INFO L226 Difference]: Without dead ends: 5775 [2020-12-22 07:08:47,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5775 states. [2020-12-22 07:08:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5775 to 4625. [2020-12-22 07:08:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4625 states. [2020-12-22 07:08:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 5559 transitions. [2020-12-22 07:08:47,664 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 5559 transitions. Word has length 135 [2020-12-22 07:08:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:47,664 INFO L481 AbstractCegarLoop]: Abstraction has 4625 states and 5559 transitions. [2020-12-22 07:08:47,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 5559 transitions. [2020-12-22 07:08:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:08:47,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:47,668 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:47,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:08:47,668 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash 640310421, now seen corresponding path program 1 times [2020-12-22 07:08:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:47,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192750353] [2020-12-22 07:08:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:47,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192750353] [2020-12-22 07:08:47,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:47,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:47,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580099198] [2020-12-22 07:08:47,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:47,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:47,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:47,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:47,737 INFO L87 Difference]: Start difference. First operand 4625 states and 5559 transitions. Second operand 3 states. [2020-12-22 07:08:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:48,419 INFO L93 Difference]: Finished difference Result 12925 states and 15489 transitions. [2020-12-22 07:08:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:48,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 07:08:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:48,430 INFO L225 Difference]: With dead ends: 12925 [2020-12-22 07:08:48,430 INFO L226 Difference]: Without dead ends: 8527 [2020-12-22 07:08:48,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2020-12-22 07:08:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8525. [2020-12-22 07:08:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8525 states. [2020-12-22 07:08:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 10155 transitions. [2020-12-22 07:08:49,201 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 10155 transitions. Word has length 135 [2020-12-22 07:08:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:49,201 INFO L481 AbstractCegarLoop]: Abstraction has 8525 states and 10155 transitions. [2020-12-22 07:08:49,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 10155 transitions. [2020-12-22 07:08:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:08:49,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:49,207 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:49,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:08:49,207 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2062462870, now seen corresponding path program 1 times [2020-12-22 07:08:49,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:49,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252948662] [2020-12-22 07:08:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:49,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252948662] [2020-12-22 07:08:49,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:49,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:49,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448689047] [2020-12-22 07:08:49,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:49,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:49,269 INFO L87 Difference]: Start difference. First operand 8525 states and 10155 transitions. Second operand 3 states. [2020-12-22 07:08:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:50,615 INFO L93 Difference]: Finished difference Result 24470 states and 29095 transitions. [2020-12-22 07:08:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:50,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:08:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:50,634 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 07:08:50,634 INFO L226 Difference]: Without dead ends: 16172 [2020-12-22 07:08:50,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2020-12-22 07:08:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 16170. [2020-12-22 07:08:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2020-12-22 07:08:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 19157 transitions. [2020-12-22 07:08:52,020 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 19157 transitions. Word has length 136 [2020-12-22 07:08:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:52,020 INFO L481 AbstractCegarLoop]: Abstraction has 16170 states and 19157 transitions. [2020-12-22 07:08:52,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 19157 transitions. [2020-12-22 07:08:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:08:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:52,028 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:52,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:08:52,029 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1687631852, now seen corresponding path program 1 times [2020-12-22 07:08:52,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:52,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143181305] [2020-12-22 07:08:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:08:52,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143181305] [2020-12-22 07:08:52,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:52,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865577971] [2020-12-22 07:08:52,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:52,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:52,063 INFO L87 Difference]: Start difference. First operand 16170 states and 19157 transitions. Second operand 3 states. [2020-12-22 07:08:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:53,411 INFO L93 Difference]: Finished difference Result 31892 states and 37806 transitions. [2020-12-22 07:08:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:53,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:08:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:53,428 INFO L225 Difference]: With dead ends: 31892 [2020-12-22 07:08:53,428 INFO L226 Difference]: Without dead ends: 15949 [2020-12-22 07:08:53,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15949 states. [2020-12-22 07:08:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15949 to 15949. [2020-12-22 07:08:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15949 states. [2020-12-22 07:08:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 18906 transitions. [2020-12-22 07:08:54,842 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 18906 transitions. Word has length 136 [2020-12-22 07:08:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:54,842 INFO L481 AbstractCegarLoop]: Abstraction has 15949 states and 18906 transitions. [2020-12-22 07:08:54,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 18906 transitions. [2020-12-22 07:08:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:08:54,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:54,848 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:54,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:08:54,848 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash -223223088, now seen corresponding path program 1 times [2020-12-22 07:08:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:54,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163194712] [2020-12-22 07:08:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:54,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163194712] [2020-12-22 07:08:54,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:54,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116897570] [2020-12-22 07:08:54,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:54,917 INFO L87 Difference]: Start difference. First operand 15949 states and 18906 transitions. Second operand 3 states. [2020-12-22 07:08:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:57,776 INFO L93 Difference]: Finished difference Result 46013 states and 54516 transitions. [2020-12-22 07:08:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:57,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 07:08:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:57,806 INFO L225 Difference]: With dead ends: 46013 [2020-12-22 07:08:57,807 INFO L226 Difference]: Without dead ends: 30291 [2020-12-22 07:08:57,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30291 states. [2020-12-22 07:09:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30291 to 30289. [2020-12-22 07:09:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30289 states. [2020-12-22 07:09:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30289 states to 30289 states and 35810 transitions. [2020-12-22 07:09:00,289 INFO L78 Accepts]: Start accepts. Automaton has 30289 states and 35810 transitions. Word has length 137 [2020-12-22 07:09:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:00,290 INFO L481 AbstractCegarLoop]: Abstraction has 30289 states and 35810 transitions. [2020-12-22 07:09:00,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30289 states and 35810 transitions. [2020-12-22 07:09:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:09:00,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:00,303 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:00,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:09:00,303 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -768095662, now seen corresponding path program 1 times [2020-12-22 07:09:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:00,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981711563] [2020-12-22 07:09:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:09:00,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981711563] [2020-12-22 07:09:00,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:00,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825084038] [2020-12-22 07:09:00,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:00,338 INFO L87 Difference]: Start difference. First operand 30289 states and 35810 transitions. Second operand 3 states. [2020-12-22 07:09:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:02,912 INFO L93 Difference]: Finished difference Result 60131 states and 71115 transitions. [2020-12-22 07:09:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:02,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 07:09:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:02,943 INFO L225 Difference]: With dead ends: 60131 [2020-12-22 07:09:02,943 INFO L226 Difference]: Without dead ends: 30069 [2020-12-22 07:09:02,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30069 states. [2020-12-22 07:09:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30069 to 30069. [2020-12-22 07:09:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30069 states. [2020-12-22 07:09:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30069 states to 30069 states and 35561 transitions. [2020-12-22 07:09:05,771 INFO L78 Accepts]: Start accepts. Automaton has 30069 states and 35561 transitions. Word has length 137 [2020-12-22 07:09:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:05,772 INFO L481 AbstractCegarLoop]: Abstraction has 30069 states and 35561 transitions. [2020-12-22 07:09:05,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30069 states and 35561 transitions. [2020-12-22 07:09:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:09:05,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:05,781 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:05,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:09:05,781 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:05,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2058170927, now seen corresponding path program 1 times [2020-12-22 07:09:05,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:05,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789496367] [2020-12-22 07:09:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:05,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789496367] [2020-12-22 07:09:05,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:05,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526889422] [2020-12-22 07:09:05,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:05,935 INFO L87 Difference]: Start difference. First operand 30069 states and 35561 transitions. Second operand 3 states. [2020-12-22 07:09:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,827 INFO L93 Difference]: Finished difference Result 88236 states and 104257 transitions. [2020-12-22 07:09:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:10,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:09:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,897 INFO L225 Difference]: With dead ends: 88236 [2020-12-22 07:09:10,897 INFO L226 Difference]: Without dead ends: 58394 [2020-12-22 07:09:10,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58394 states. [2020-12-22 07:09:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58394 to 58392. [2020-12-22 07:09:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58392 states. [2020-12-22 07:09:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58392 states to 58392 states and 68863 transitions. [2020-12-22 07:09:16,314 INFO L78 Accepts]: Start accepts. Automaton has 58392 states and 68863 transitions. Word has length 138 [2020-12-22 07:09:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:16,315 INFO L481 AbstractCegarLoop]: Abstraction has 58392 states and 68863 transitions. [2020-12-22 07:09:16,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 58392 states and 68863 transitions. [2020-12-22 07:09:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:09:16,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:16,331 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:16,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:09:16,332 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1513298353, now seen corresponding path program 1 times [2020-12-22 07:09:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:16,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580893828] [2020-12-22 07:09:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:09:16,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580893828] [2020-12-22 07:09:16,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:16,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:16,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701373259] [2020-12-22 07:09:16,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:16,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:16,480 INFO L87 Difference]: Start difference. First operand 58392 states and 68863 transitions. Second operand 3 states. [2020-12-22 07:09:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:21,721 INFO L93 Difference]: Finished difference Result 116338 states and 137224 transitions. [2020-12-22 07:09:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:21,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:09:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:21,788 INFO L225 Difference]: With dead ends: 116338 [2020-12-22 07:09:21,788 INFO L226 Difference]: Without dead ends: 58173 [2020-12-22 07:09:21,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58173 states. [2020-12-22 07:09:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58173 to 58173. [2020-12-22 07:09:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58173 states. [2020-12-22 07:09:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58173 states to 58173 states and 68616 transitions. [2020-12-22 07:09:27,103 INFO L78 Accepts]: Start accepts. Automaton has 58173 states and 68616 transitions. Word has length 138 [2020-12-22 07:09:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:27,103 INFO L481 AbstractCegarLoop]: Abstraction has 58173 states and 68616 transitions. [2020-12-22 07:09:27,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 58173 states and 68616 transitions. [2020-12-22 07:09:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:09:27,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:27,115 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:27,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:09:27,116 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -197589749, now seen corresponding path program 1 times [2020-12-22 07:09:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:27,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227132378] [2020-12-22 07:09:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:27,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227132378] [2020-12-22 07:09:27,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:27,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:27,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455399714] [2020-12-22 07:09:27,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:27,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:27,181 INFO L87 Difference]: Start difference. First operand 58173 states and 68616 transitions. Second operand 3 states. [2020-12-22 07:09:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:36,601 INFO L93 Difference]: Finished difference Result 168075 states and 198222 transitions. [2020-12-22 07:09:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:36,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 07:09:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:36,740 INFO L225 Difference]: With dead ends: 168075 [2020-12-22 07:09:36,741 INFO L226 Difference]: Without dead ends: 110129 [2020-12-22 07:09:36,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110129 states. [2020-12-22 07:09:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110129 to 110127. [2020-12-22 07:09:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110127 states. [2020-12-22 07:09:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110127 states to 110127 states and 129708 transitions. [2020-12-22 07:09:46,739 INFO L78 Accepts]: Start accepts. Automaton has 110127 states and 129708 transitions. Word has length 139 [2020-12-22 07:09:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:46,739 INFO L481 AbstractCegarLoop]: Abstraction has 110127 states and 129708 transitions. [2020-12-22 07:09:46,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 110127 states and 129708 transitions. [2020-12-22 07:09:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:09:46,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:46,764 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:46,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:09:46,764 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -742462323, now seen corresponding path program 1 times [2020-12-22 07:09:46,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:46,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889695564] [2020-12-22 07:09:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:09:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889695564] [2020-12-22 07:09:46,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:46,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:46,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503934769] [2020-12-22 07:09:46,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:46,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:46,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:46,803 INFO L87 Difference]: Start difference. First operand 110127 states and 129708 transitions. Second operand 3 states. [2020-12-22 07:09:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:56,959 INFO L93 Difference]: Finished difference Result 219825 states and 258935 transitions. [2020-12-22 07:09:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:56,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 07:09:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:57,121 INFO L225 Difference]: With dead ends: 219825 [2020-12-22 07:09:57,121 INFO L226 Difference]: Without dead ends: 109909 [2020-12-22 07:09:57,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109909 states. [2020-12-22 07:10:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109909 to 109909. [2020-12-22 07:10:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109909 states. [2020-12-22 07:10:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109909 states to 109909 states and 129463 transitions. [2020-12-22 07:10:07,371 INFO L78 Accepts]: Start accepts. Automaton has 109909 states and 129463 transitions. Word has length 139 [2020-12-22 07:10:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:07,371 INFO L481 AbstractCegarLoop]: Abstraction has 109909 states and 129463 transitions. [2020-12-22 07:10:07,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 109909 states and 129463 transitions. [2020-12-22 07:10:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:10:07,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:07,390 INFO L422 BasicCegarLoop]: trace histogram [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 07:10:07,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:10:07,391 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:07,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2058133492, now seen corresponding path program 1 times [2020-12-22 07:10:07,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:07,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714327140] [2020-12-22 07:10:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714327140] [2020-12-22 07:10:07,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:07,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:10:07,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956021497] [2020-12-22 07:10:07,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:07,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:07,454 INFO L87 Difference]: Start difference. First operand 109909 states and 129463 transitions. Second operand 4 states.