/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:06:25,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:06:25,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:06:25,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:06:25,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:06:25,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:06:25,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:06:25,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:06:25,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:06:25,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:06:25,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:06:25,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:06:25,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:06:25,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:06:25,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:06:25,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:06:25,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:06:25,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:06:25,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:06:25,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:06:25,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:06:25,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:06:25,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:06:25,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:06:25,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:06:25,538 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:06:25,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:06:25,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:06:25,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:06:25,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:06:25,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:06:25,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:06:25,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:06:25,540 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:06:25,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:06:25,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:06:25,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:06:25,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:06:25,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:25,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:06:25,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:06:25,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:06:25,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:06:25,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:06:25,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:06:25,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:06:25,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:06:25,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:06:26,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:06:26,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:06:26,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:06:26,013 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:06:26,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:06:26,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5a542c3/5c283fd6a73b4a0595ff8e23339f41c9/FLAG7227712c8 [2020-12-22 08:06:26,798 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:06:26,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:06:26,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5a542c3/5c283fd6a73b4a0595ff8e23339f41c9/FLAG7227712c8 [2020-12-22 08:06:27,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5a542c3/5c283fd6a73b4a0595ff8e23339f41c9 [2020-12-22 08:06:27,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:06:27,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:06:27,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:27,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:06:27,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:06:27,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d7b4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27, skipping insertion in model container [2020-12-22 08:06:27,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:06:27,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:06:27,402 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6943,6956] [2020-12-22 08:06:27,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:27,454 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:06:27,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6943,6956] [2020-12-22 08:06:27,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:27,589 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:06:27,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27 WrapperNode [2020-12-22 08:06:27,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:27,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:27,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:06:27,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:06:27,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:27,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:06:27,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:06:27,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:06:27,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (1/1) ... [2020-12-22 08:06:27,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:06:27,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:06:27,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:06:27,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:06:27,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (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 08:06:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:06:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:06:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:06:27,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:06:28,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:06:28,836 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:06:28,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:28 BoogieIcfgContainer [2020-12-22 08:06:28,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:06:28,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:06:28,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:06:28,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:06:28,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:06:27" (1/3) ... [2020-12-22 08:06:28,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35026623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:28, skipping insertion in model container [2020-12-22 08:06:28,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:27" (2/3) ... [2020-12-22 08:06:28,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35026623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:28, skipping insertion in model container [2020-12-22 08:06:28,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:28" (3/3) ... [2020-12-22 08:06:28,847 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:06:28,853 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:06:28,860 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:06:28,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:06:28,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:06:28,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:06:28,912 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:06:28,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:06:28,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:06:28,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:06:28,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:06:28,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:06:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-12-22 08:06:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:06:28,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:28,944 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] [2020-12-22 08:06:28,944 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2020-12-22 08:06:28,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:28,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010560955] [2020-12-22 08:06:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:29,442 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 08:06:29,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010560955] [2020-12-22 08:06:29,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:29,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:29,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889047288] [2020-12-22 08:06:29,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:29,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:29,468 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 3 states. [2020-12-22 08:06:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:29,617 INFO L93 Difference]: Finished difference Result 303 states and 512 transitions. [2020-12-22 08:06:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:29,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:06:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:29,652 INFO L225 Difference]: With dead ends: 303 [2020-12-22 08:06:29,652 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 08:06:29,657 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 08:06:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 08:06:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-12-22 08:06:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 08:06:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 327 transitions. [2020-12-22 08:06:29,771 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 327 transitions. Word has length 56 [2020-12-22 08:06:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:29,772 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 327 transitions. [2020-12-22 08:06:29,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 327 transitions. [2020-12-22 08:06:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:06:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:29,781 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] [2020-12-22 08:06:29,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:06:29,782 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2020-12-22 08:06:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:29,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921619210] [2020-12-22 08:06:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:30,026 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 08:06:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921619210] [2020-12-22 08:06:30,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:30,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321472345] [2020-12-22 08:06:30,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:30,033 INFO L87 Difference]: Start difference. First operand 208 states and 327 transitions. Second operand 3 states. [2020-12-22 08:06:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:30,137 INFO L93 Difference]: Finished difference Result 502 states and 811 transitions. [2020-12-22 08:06:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:30,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:06:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:30,145 INFO L225 Difference]: With dead ends: 502 [2020-12-22 08:06:30,145 INFO L226 Difference]: Without dead ends: 348 [2020-12-22 08:06:30,149 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 08:06:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-22 08:06:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2020-12-22 08:06:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 08:06:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 549 transitions. [2020-12-22 08:06:30,193 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 549 transitions. Word has length 58 [2020-12-22 08:06:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:30,194 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 549 transitions. [2020-12-22 08:06:30,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 549 transitions. [2020-12-22 08:06:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:06:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:30,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:30,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:06:30,197 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1017067947, now seen corresponding path program 1 times [2020-12-22 08:06:30,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:30,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247082786] [2020-12-22 08:06:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:30,337 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 08:06:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247082786] [2020-12-22 08:06:30,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:30,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:30,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097752748] [2020-12-22 08:06:30,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:30,340 INFO L87 Difference]: Start difference. First operand 344 states and 549 transitions. Second operand 3 states. [2020-12-22 08:06:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:30,422 INFO L93 Difference]: Finished difference Result 896 states and 1451 transitions. [2020-12-22 08:06:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:30,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:06:30,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:30,429 INFO L225 Difference]: With dead ends: 896 [2020-12-22 08:06:30,430 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 08:06:30,434 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 08:06:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 08:06:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2020-12-22 08:06:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-12-22 08:06:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 961 transitions. [2020-12-22 08:06:30,506 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 961 transitions. Word has length 60 [2020-12-22 08:06:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:30,513 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 961 transitions. [2020-12-22 08:06:30,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 961 transitions. [2020-12-22 08:06:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:06:30,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:30,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:30,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:06:30,519 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash 291448600, now seen corresponding path program 1 times [2020-12-22 08:06:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:30,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782948704] [2020-12-22 08:06:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:30,667 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 08:06:30,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782948704] [2020-12-22 08:06:30,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:30,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889656588] [2020-12-22 08:06:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:30,674 INFO L87 Difference]: Start difference. First operand 600 states and 961 transitions. Second operand 5 states. [2020-12-22 08:06:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:30,871 INFO L93 Difference]: Finished difference Result 2148 states and 3509 transitions. [2020-12-22 08:06:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:30,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:06:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:30,882 INFO L225 Difference]: With dead ends: 2148 [2020-12-22 08:06:30,882 INFO L226 Difference]: Without dead ends: 1602 [2020-12-22 08:06:30,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-12-22 08:06:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1089. [2020-12-22 08:06:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-12-22 08:06:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1754 transitions. [2020-12-22 08:06:30,963 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1754 transitions. Word has length 62 [2020-12-22 08:06:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:30,964 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1754 transitions. [2020-12-22 08:06:30,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1754 transitions. [2020-12-22 08:06:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:06:30,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:30,966 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] [2020-12-22 08:06:30,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:06:30,967 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash 382467820, now seen corresponding path program 1 times [2020-12-22 08:06:30,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:30,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469499863] [2020-12-22 08:06:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:31,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469499863] [2020-12-22 08:06:31,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:31,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874285264] [2020-12-22 08:06:31,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:31,053 INFO L87 Difference]: Start difference. First operand 1089 states and 1754 transitions. Second operand 4 states. [2020-12-22 08:06:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:31,220 INFO L93 Difference]: Finished difference Result 2874 states and 4692 transitions. [2020-12-22 08:06:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:31,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 08:06:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:31,231 INFO L225 Difference]: With dead ends: 2874 [2020-12-22 08:06:31,231 INFO L226 Difference]: Without dead ends: 1839 [2020-12-22 08:06:31,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2020-12-22 08:06:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1601. [2020-12-22 08:06:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-12-22 08:06:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2595 transitions. [2020-12-22 08:06:31,355 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2595 transitions. Word has length 63 [2020-12-22 08:06:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:31,356 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2595 transitions. [2020-12-22 08:06:31,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2595 transitions. [2020-12-22 08:06:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:06:31,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:31,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:31,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:06:31,358 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:31,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1086345633, now seen corresponding path program 1 times [2020-12-22 08:06:31,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:31,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994619498] [2020-12-22 08:06:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:31,421 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 08:06:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994619498] [2020-12-22 08:06:31,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:31,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810887550] [2020-12-22 08:06:31,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:31,423 INFO L87 Difference]: Start difference. First operand 1601 states and 2595 transitions. Second operand 4 states. [2020-12-22 08:06:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:31,644 INFO L93 Difference]: Finished difference Result 4202 states and 6864 transitions. [2020-12-22 08:06:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:31,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:06:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:31,659 INFO L225 Difference]: With dead ends: 4202 [2020-12-22 08:06:31,659 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 08:06:31,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 08:06:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2336. [2020-12-22 08:06:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2020-12-22 08:06:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3787 transitions. [2020-12-22 08:06:31,857 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3787 transitions. Word has length 64 [2020-12-22 08:06:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:31,857 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3787 transitions. [2020-12-22 08:06:31,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3787 transitions. [2020-12-22 08:06:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:06:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:31,860 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] [2020-12-22 08:06:31,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:06:31,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1879078355, now seen corresponding path program 1 times [2020-12-22 08:06:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:31,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779987347] [2020-12-22 08:06:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:31,937 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 08:06:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779987347] [2020-12-22 08:06:31,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:31,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115485437] [2020-12-22 08:06:31,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:31,941 INFO L87 Difference]: Start difference. First operand 2336 states and 3787 transitions. Second operand 3 states. [2020-12-22 08:06:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:32,233 INFO L93 Difference]: Finished difference Result 5150 states and 8392 transitions. [2020-12-22 08:06:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:32,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:06:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:32,253 INFO L225 Difference]: With dead ends: 5150 [2020-12-22 08:06:32,253 INFO L226 Difference]: Without dead ends: 3529 [2020-12-22 08:06:32,260 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 08:06:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2020-12-22 08:06:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3527. [2020-12-22 08:06:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3527 states. [2020-12-22 08:06:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 5708 transitions. [2020-12-22 08:06:32,492 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 5708 transitions. Word has length 65 [2020-12-22 08:06:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:32,493 INFO L481 AbstractCegarLoop]: Abstraction has 3527 states and 5708 transitions. [2020-12-22 08:06:32,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 5708 transitions. [2020-12-22 08:06:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:06:32,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:32,494 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] [2020-12-22 08:06:32,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:06:32,495 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -450865020, now seen corresponding path program 1 times [2020-12-22 08:06:32,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:32,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12813346] [2020-12-22 08:06:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:32,552 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 08:06:32,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12813346] [2020-12-22 08:06:32,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:32,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:32,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481977018] [2020-12-22 08:06:32,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:32,556 INFO L87 Difference]: Start difference. First operand 3527 states and 5708 transitions. Second operand 3 states. [2020-12-22 08:06:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:32,850 INFO L93 Difference]: Finished difference Result 6985 states and 11358 transitions. [2020-12-22 08:06:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:32,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:06:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:32,876 INFO L225 Difference]: With dead ends: 6985 [2020-12-22 08:06:32,877 INFO L226 Difference]: Without dead ends: 4965 [2020-12-22 08:06:32,881 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 08:06:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2020-12-22 08:06:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 4963. [2020-12-22 08:06:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4963 states. [2020-12-22 08:06:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 8011 transitions. [2020-12-22 08:06:33,227 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 8011 transitions. Word has length 65 [2020-12-22 08:06:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:33,227 INFO L481 AbstractCegarLoop]: Abstraction has 4963 states and 8011 transitions. [2020-12-22 08:06:33,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 8011 transitions. [2020-12-22 08:06:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:06:33,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:33,233 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] [2020-12-22 08:06:33,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:06:33,234 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash 629635603, now seen corresponding path program 1 times [2020-12-22 08:06:33,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:33,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887533027] [2020-12-22 08:06:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:33,325 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 08:06:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887533027] [2020-12-22 08:06:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:33,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824871354] [2020-12-22 08:06:33,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:33,333 INFO L87 Difference]: Start difference. First operand 4963 states and 8011 transitions. Second operand 4 states. [2020-12-22 08:06:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:33,938 INFO L93 Difference]: Finished difference Result 13573 states and 22049 transitions. [2020-12-22 08:06:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:33,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:06:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:34,004 INFO L225 Difference]: With dead ends: 13573 [2020-12-22 08:06:34,004 INFO L226 Difference]: Without dead ends: 8744 [2020-12-22 08:06:34,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2020-12-22 08:06:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7677. [2020-12-22 08:06:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7677 states. [2020-12-22 08:06:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 12369 transitions. [2020-12-22 08:06:34,652 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 12369 transitions. Word has length 65 [2020-12-22 08:06:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:34,653 INFO L481 AbstractCegarLoop]: Abstraction has 7677 states and 12369 transitions. [2020-12-22 08:06:34,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 12369 transitions. [2020-12-22 08:06:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:06:34,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:34,654 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] [2020-12-22 08:06:34,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:06:34,655 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1734684554, now seen corresponding path program 1 times [2020-12-22 08:06:34,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:34,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578706689] [2020-12-22 08:06:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:34,709 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 08:06:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578706689] [2020-12-22 08:06:34,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:34,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907066227] [2020-12-22 08:06:34,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:34,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:34,712 INFO L87 Difference]: Start difference. First operand 7677 states and 12369 transitions. Second operand 3 states. [2020-12-22 08:06:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:35,399 INFO L93 Difference]: Finished difference Result 16751 states and 27364 transitions. [2020-12-22 08:06:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:35,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:06:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:35,429 INFO L225 Difference]: With dead ends: 16751 [2020-12-22 08:06:35,429 INFO L226 Difference]: Without dead ends: 11226 [2020-12-22 08:06:35,440 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 08:06:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2020-12-22 08:06:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 11224. [2020-12-22 08:06:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:06:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18145 transitions. [2020-12-22 08:06:36,119 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18145 transitions. Word has length 65 [2020-12-22 08:06:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:36,119 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18145 transitions. [2020-12-22 08:06:36,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18145 transitions. [2020-12-22 08:06:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:06:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:36,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:36,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:06:36,121 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2027885532, now seen corresponding path program 1 times [2020-12-22 08:06:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879134859] [2020-12-22 08:06:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:36,307 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 08:06:36,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879134859] [2020-12-22 08:06:36,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:36,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719022987] [2020-12-22 08:06:36,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:36,310 INFO L87 Difference]: Start difference. First operand 11224 states and 18145 transitions. Second operand 5 states. [2020-12-22 08:06:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:37,589 INFO L93 Difference]: Finished difference Result 26414 states and 42938 transitions. [2020-12-22 08:06:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:37,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:06:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:37,630 INFO L225 Difference]: With dead ends: 26414 [2020-12-22 08:06:37,630 INFO L226 Difference]: Without dead ends: 15271 [2020-12-22 08:06:37,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15271 states. [2020-12-22 08:06:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15271 to 11224. [2020-12-22 08:06:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:06:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18020 transitions. [2020-12-22 08:06:38,431 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18020 transitions. Word has length 67 [2020-12-22 08:06:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18020 transitions. [2020-12-22 08:06:38,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18020 transitions. [2020-12-22 08:06:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:06:38,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:38,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:38,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:06:38,433 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1776446511, now seen corresponding path program 1 times [2020-12-22 08:06:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146486364] [2020-12-22 08:06:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:38,577 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 08:06:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146486364] [2020-12-22 08:06:38,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:38,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247812708] [2020-12-22 08:06:38,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:38,579 INFO L87 Difference]: Start difference. First operand 11224 states and 18020 transitions. Second operand 5 states. [2020-12-22 08:06:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:39,972 INFO L93 Difference]: Finished difference Result 35257 states and 57017 transitions. [2020-12-22 08:06:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:39,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 08:06:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:40,046 INFO L225 Difference]: With dead ends: 35257 [2020-12-22 08:06:40,046 INFO L226 Difference]: Without dead ends: 24114 [2020-12-22 08:06:40,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24114 states. [2020-12-22 08:06:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24114 to 16142. [2020-12-22 08:06:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16142 states. [2020-12-22 08:06:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16142 states to 16142 states and 25907 transitions. [2020-12-22 08:06:41,317 INFO L78 Accepts]: Start accepts. Automaton has 16142 states and 25907 transitions. Word has length 70 [2020-12-22 08:06:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:41,317 INFO L481 AbstractCegarLoop]: Abstraction has 16142 states and 25907 transitions. [2020-12-22 08:06:41,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16142 states and 25907 transitions. [2020-12-22 08:06:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:06:41,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:41,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:41,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:06:41,319 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 762823713, now seen corresponding path program 1 times [2020-12-22 08:06:41,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:41,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891628728] [2020-12-22 08:06:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:41,420 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 08:06:41,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891628728] [2020-12-22 08:06:41,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:41,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:41,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064443903] [2020-12-22 08:06:41,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:41,423 INFO L87 Difference]: Start difference. First operand 16142 states and 25907 transitions. Second operand 5 states. [2020-12-22 08:06:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:43,566 INFO L93 Difference]: Finished difference Result 32386 states and 51688 transitions. [2020-12-22 08:06:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:06:43,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 08:06:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:43,632 INFO L225 Difference]: With dead ends: 32386 [2020-12-22 08:06:43,633 INFO L226 Difference]: Without dead ends: 32384 [2020-12-22 08:06:43,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:06:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2020-12-22 08:06:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 16766. [2020-12-22 08:06:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16766 states. [2020-12-22 08:06:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 26522 transitions. [2020-12-22 08:06:45,142 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 26522 transitions. Word has length 71 [2020-12-22 08:06:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:45,142 INFO L481 AbstractCegarLoop]: Abstraction has 16766 states and 26522 transitions. [2020-12-22 08:06:45,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 26522 transitions. [2020-12-22 08:06:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:06:45,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:45,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:45,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:06:45,146 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1613729099, now seen corresponding path program 1 times [2020-12-22 08:06:45,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:45,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240282094] [2020-12-22 08:06:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:06:45,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240282094] [2020-12-22 08:06:45,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:45,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:45,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189907170] [2020-12-22 08:06:45,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:45,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:45,287 INFO L87 Difference]: Start difference. First operand 16766 states and 26522 transitions. Second operand 5 states. [2020-12-22 08:06:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:46,912 INFO L93 Difference]: Finished difference Result 24558 states and 39250 transitions. [2020-12-22 08:06:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:46,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:06:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:46,954 INFO L225 Difference]: With dead ends: 24558 [2020-12-22 08:06:46,954 INFO L226 Difference]: Without dead ends: 19386 [2020-12-22 08:06:46,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19386 states. [2020-12-22 08:06:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19386 to 18334. [2020-12-22 08:06:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18334 states. [2020-12-22 08:06:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18334 states to 18334 states and 28980 transitions. [2020-12-22 08:06:48,284 INFO L78 Accepts]: Start accepts. Automaton has 18334 states and 28980 transitions. Word has length 93 [2020-12-22 08:06:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:48,284 INFO L481 AbstractCegarLoop]: Abstraction has 18334 states and 28980 transitions. [2020-12-22 08:06:48,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18334 states and 28980 transitions. [2020-12-22 08:06:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:06:48,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:48,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:48,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:06:48,288 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 351294822, now seen corresponding path program 1 times [2020-12-22 08:06:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:48,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779964437] [2020-12-22 08:06:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 08:06:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779964437] [2020-12-22 08:06:48,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:48,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:48,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564787820] [2020-12-22 08:06:48,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:48,396 INFO L87 Difference]: Start difference. First operand 18334 states and 28980 transitions. Second operand 5 states. [2020-12-22 08:06:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:50,179 INFO L93 Difference]: Finished difference Result 25592 states and 40770 transitions. [2020-12-22 08:06:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:50,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:06:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:50,217 INFO L225 Difference]: With dead ends: 25592 [2020-12-22 08:06:50,217 INFO L226 Difference]: Without dead ends: 20420 [2020-12-22 08:06:50,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20420 states. [2020-12-22 08:06:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20420 to 19998. [2020-12-22 08:06:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19998 states. [2020-12-22 08:06:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 31664 transitions. [2020-12-22 08:06:51,634 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 31664 transitions. Word has length 93 [2020-12-22 08:06:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:51,634 INFO L481 AbstractCegarLoop]: Abstraction has 19998 states and 31664 transitions. [2020-12-22 08:06:51,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 31664 transitions. [2020-12-22 08:06:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:06:51,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:51,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:51,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:06:51,638 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1758122900, now seen corresponding path program 1 times [2020-12-22 08:06:51,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:51,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589156301] [2020-12-22 08:06:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:06:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589156301] [2020-12-22 08:06:51,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:51,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879733405] [2020-12-22 08:06:51,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:51,737 INFO L87 Difference]: Start difference. First operand 19998 states and 31664 transitions. Second operand 5 states. [2020-12-22 08:06:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:53,357 INFO L93 Difference]: Finished difference Result 28944 states and 46288 transitions. [2020-12-22 08:06:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:06:53,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:06:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:53,390 INFO L225 Difference]: With dead ends: 28944 [2020-12-22 08:06:53,390 INFO L226 Difference]: Without dead ends: 23732 [2020-12-22 08:06:53,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23732 states. [2020-12-22 08:06:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23732 to 21670. [2020-12-22 08:06:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21670 states. [2020-12-22 08:06:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21670 states to 21670 states and 34380 transitions. [2020-12-22 08:06:55,110 INFO L78 Accepts]: Start accepts. Automaton has 21670 states and 34380 transitions. Word has length 93 [2020-12-22 08:06:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:55,110 INFO L481 AbstractCegarLoop]: Abstraction has 21670 states and 34380 transitions. [2020-12-22 08:06:55,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 21670 states and 34380 transitions. [2020-12-22 08:06:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:06:55,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:55,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:55,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:06:55,115 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1270260760, now seen corresponding path program 1 times [2020-12-22 08:06:55,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:55,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503060106] [2020-12-22 08:06:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:06:55,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503060106] [2020-12-22 08:06:55,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:55,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:55,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573657762] [2020-12-22 08:06:55,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:55,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:55,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:55,199 INFO L87 Difference]: Start difference. First operand 21670 states and 34380 transitions. Second operand 4 states. [2020-12-22 08:06:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:57,150 INFO L93 Difference]: Finished difference Result 31922 states and 51155 transitions. [2020-12-22 08:06:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:57,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 08:06:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:57,182 INFO L225 Difference]: With dead ends: 31922 [2020-12-22 08:06:57,182 INFO L226 Difference]: Without dead ends: 25038 [2020-12-22 08:06:57,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25038 states. [2020-12-22 08:06:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25038 to 24210. [2020-12-22 08:06:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24210 states. [2020-12-22 08:06:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24210 states to 24210 states and 38482 transitions. [2020-12-22 08:06:58,910 INFO L78 Accepts]: Start accepts. Automaton has 24210 states and 38482 transitions. Word has length 94 [2020-12-22 08:06:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:58,911 INFO L481 AbstractCegarLoop]: Abstraction has 24210 states and 38482 transitions. [2020-12-22 08:06:58,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24210 states and 38482 transitions. [2020-12-22 08:06:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:06:58,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:58,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:58,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:06:58,914 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash 36164624, now seen corresponding path program 1 times [2020-12-22 08:06:58,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:58,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668675759] [2020-12-22 08:06:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:06:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668675759] [2020-12-22 08:06:58,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:58,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234648871] [2020-12-22 08:06:58,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:58,978 INFO L87 Difference]: Start difference. First operand 24210 states and 38482 transitions. Second operand 3 states. [2020-12-22 08:07:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:01,540 INFO L93 Difference]: Finished difference Result 49303 states and 78944 transitions. [2020-12-22 08:07:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:01,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:07:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:01,595 INFO L225 Difference]: With dead ends: 49303 [2020-12-22 08:07:01,595 INFO L226 Difference]: Without dead ends: 40359 [2020-12-22 08:07:01,612 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 08:07:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40359 states. [2020-12-22 08:07:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40359 to 40300. [2020-12-22 08:07:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40300 states. [2020-12-22 08:07:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40300 states to 40300 states and 64214 transitions. [2020-12-22 08:07:04,773 INFO L78 Accepts]: Start accepts. Automaton has 40300 states and 64214 transitions. Word has length 94 [2020-12-22 08:07:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:04,773 INFO L481 AbstractCegarLoop]: Abstraction has 40300 states and 64214 transitions. [2020-12-22 08:07:04,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 40300 states and 64214 transitions. [2020-12-22 08:07:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:07:04,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:04,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:04,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:07:04,778 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:04,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:04,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1988921020, now seen corresponding path program 1 times [2020-12-22 08:07:04,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:04,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597535613] [2020-12-22 08:07:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:07:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597535613] [2020-12-22 08:07:04,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:04,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635244092] [2020-12-22 08:07:04,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:04,877 INFO L87 Difference]: Start difference. First operand 40300 states and 64214 transitions. Second operand 4 states. [2020-12-22 08:07:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:08,299 INFO L93 Difference]: Finished difference Result 57260 states and 91609 transitions. [2020-12-22 08:07:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:08,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 08:07:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:08,370 INFO L225 Difference]: With dead ends: 57260 [2020-12-22 08:07:08,371 INFO L226 Difference]: Without dead ends: 45534 [2020-12-22 08:07:08,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45534 states. [2020-12-22 08:07:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45534 to 43058. [2020-12-22 08:07:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43058 states. [2020-12-22 08:07:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43058 states to 43058 states and 68570 transitions. [2020-12-22 08:07:11,936 INFO L78 Accepts]: Start accepts. Automaton has 43058 states and 68570 transitions. Word has length 95 [2020-12-22 08:07:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:11,936 INFO L481 AbstractCegarLoop]: Abstraction has 43058 states and 68570 transitions. [2020-12-22 08:07:11,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 43058 states and 68570 transitions. [2020-12-22 08:07:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:07:11,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:11,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:11,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:07:11,940 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1437742065, now seen corresponding path program 1 times [2020-12-22 08:07:11,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:11,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6774494] [2020-12-22 08:07:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:07:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6774494] [2020-12-22 08:07:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326134676] [2020-12-22 08:07:12,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:12,008 INFO L87 Difference]: Start difference. First operand 43058 states and 68570 transitions. Second operand 3 states. [2020-12-22 08:07:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:17,261 INFO L93 Difference]: Finished difference Result 87287 states and 139480 transitions. [2020-12-22 08:07:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:17,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:07:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:17,349 INFO L225 Difference]: With dead ends: 87287 [2020-12-22 08:07:17,349 INFO L226 Difference]: Without dead ends: 70167 [2020-12-22 08:07:17,370 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 08:07:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70167 states. [2020-12-22 08:07:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70167 to 70066. [2020-12-22 08:07:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70066 states. [2020-12-22 08:07:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70066 states to 70066 states and 111450 transitions. [2020-12-22 08:07:23,086 INFO L78 Accepts]: Start accepts. Automaton has 70066 states and 111450 transitions. Word has length 95 [2020-12-22 08:07:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:23,086 INFO L481 AbstractCegarLoop]: Abstraction has 70066 states and 111450 transitions. [2020-12-22 08:07:23,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 70066 states and 111450 transitions. [2020-12-22 08:07:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:07:23,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:23,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:23,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:07:23,091 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1035854142, now seen corresponding path program 1 times [2020-12-22 08:07:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:23,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934569341] [2020-12-22 08:07:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934569341] [2020-12-22 08:07:23,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:23,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689305355] [2020-12-22 08:07:23,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:23,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:23,162 INFO L87 Difference]: Start difference. First operand 70066 states and 111450 transitions. Second operand 3 states. [2020-12-22 08:07:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:34,246 INFO L93 Difference]: Finished difference Result 206536 states and 328555 transitions. [2020-12-22 08:07:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:34,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:07:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:34,649 INFO L225 Difference]: With dead ends: 206536 [2020-12-22 08:07:34,649 INFO L226 Difference]: Without dead ends: 136540 [2020-12-22 08:07:34,751 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 08:07:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136540 states. [2020-12-22 08:07:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136540 to 136538. [2020-12-22 08:07:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136538 states. [2020-12-22 08:07:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136538 states to 136538 states and 215845 transitions. [2020-12-22 08:07:46,498 INFO L78 Accepts]: Start accepts. Automaton has 136538 states and 215845 transitions. Word has length 95 [2020-12-22 08:07:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:46,498 INFO L481 AbstractCegarLoop]: Abstraction has 136538 states and 215845 transitions. [2020-12-22 08:07:46,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 136538 states and 215845 transitions. [2020-12-22 08:07:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:07:46,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:46,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:46,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:07:46,504 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1015816888, now seen corresponding path program 1 times [2020-12-22 08:07:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:46,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683733118] [2020-12-22 08:07:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683733118] [2020-12-22 08:07:46,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:46,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:46,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054952586] [2020-12-22 08:07:46,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:46,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:46,578 INFO L87 Difference]: Start difference. First operand 136538 states and 215845 transitions. Second operand 3 states. [2020-12-22 08:08:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:08,227 INFO L93 Difference]: Finished difference Result 401922 states and 635406 transitions. [2020-12-22 08:08:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:08,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:08:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:08,803 INFO L225 Difference]: With dead ends: 401922 [2020-12-22 08:08:08,803 INFO L226 Difference]: Without dead ends: 265521 [2020-12-22 08:08:08,963 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 08:08:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265521 states.