/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:30:15,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:30:15,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:30:15,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 19:30:15,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:30:15,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:30:15,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:30:15,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:30:15,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:30:15,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:30:15,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:30:15,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:30:15,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:30:15,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:30:15,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:30:15,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:30:15,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:30:16,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:30:16,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:30:16,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:30:16,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:30:16,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:30:16,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:30:16,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:30:16,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:30:16,033 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:30:16,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:30:16,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:30:16,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:30:16,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:30:16,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:30:16,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:30:16,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:30:16,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:30:16,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:30:16,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:30:16,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:30:16,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:30:16,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:30:16,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:30:16,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:30:16,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:30:16,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:30:16,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:30:16,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:30:16,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:30:16,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:30:16,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:30:16,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:30:16,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:30:16,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:30:16,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:30:16,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:30:16,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:30:16,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:30:16,364 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:30:16,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 19:30:16,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6dc8ef15/fee47a9c119a45e28455cc9cd7f49ac3/FLAGfece8a58d [2020-08-18 19:30:16,948 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:30:16,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 19:30:16,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6dc8ef15/fee47a9c119a45e28455cc9cd7f49ac3/FLAGfece8a58d [2020-08-18 19:30:17,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6dc8ef15/fee47a9c119a45e28455cc9cd7f49ac3 [2020-08-18 19:30:17,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:30:17,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:30:17,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:17,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:30:17,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:30:17,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135544d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17, skipping insertion in model container [2020-08-18 19:30:17,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:30:17,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:30:17,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:17,624 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:30:17,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:17,668 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:30:17,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17 WrapperNode [2020-08-18 19:30:17,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:17,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:30:17,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:30:17,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:30:17,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... [2020-08-18 19:30:17,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:30:17,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:30:17,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:30:17,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:30:17,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 19:30:17,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:30:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:30:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:30:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:30:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:30:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:30:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:30:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:30:18,182 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:30:18,183 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 19:30:18,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:18 BoogieIcfgContainer [2020-08-18 19:30:18,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:30:18,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:30:18,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:30:18,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:30:18,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:30:17" (1/3) ... [2020-08-18 19:30:18,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e00f32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:18, skipping insertion in model container [2020-08-18 19:30:18,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:17" (2/3) ... [2020-08-18 19:30:18,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e00f32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:18, skipping insertion in model container [2020-08-18 19:30:18,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:18" (3/3) ... [2020-08-18 19:30:18,198 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 19:30:18,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:30:18,227 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:30:18,264 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:30:18,288 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:30:18,288 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:30:18,288 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:30:18,288 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:30:18,288 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:30:18,289 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:30:18,289 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:30:18,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:30:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 19:30:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 19:30:18,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,316 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] [2020-08-18 19:30:18,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 19:30:18,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297269108] [2020-08-18 19:30:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297269108] [2020-08-18 19:30:18,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082911292] [2020-08-18 19:30:18,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,586 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 19:30:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:18,679 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 19:30:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:18,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 19:30:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:18,695 INFO L225 Difference]: With dead ends: 93 [2020-08-18 19:30:18,695 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 19:30:18,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 19:30:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 19:30:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 19:30:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 19:30:18,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 19:30:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:18,748 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 19:30:18,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 19:30:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 19:30:18,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,750 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] [2020-08-18 19:30:18,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:30:18,751 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 19:30:18,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153718767] [2020-08-18 19:30:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153718767] [2020-08-18 19:30:18,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556195080] [2020-08-18 19:30:18,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,841 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 19:30:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:18,874 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 19:30:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:18,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 19:30:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:18,877 INFO L225 Difference]: With dead ends: 127 [2020-08-18 19:30:18,878 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 19:30:18,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 19:30:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 19:30:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 19:30:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 19:30:18,892 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 19:30:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:18,892 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 19:30:18,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 19:30:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:18,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,894 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] [2020-08-18 19:30:18,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:30:18,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 19:30:18,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156197298] [2020-08-18 19:30:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156197298] [2020-08-18 19:30:18,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863102997] [2020-08-18 19:30:18,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,982 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 19:30:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,038 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 19:30:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,041 INFO L225 Difference]: With dead ends: 117 [2020-08-18 19:30:19,043 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 19:30:19,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 19:30:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 19:30:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 19:30:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 19:30:19,058 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 19:30:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,058 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 19:30:19,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 19:30:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:19,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,060 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] [2020-08-18 19:30:19,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:30:19,060 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 19:30:19,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542529682] [2020-08-18 19:30:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542529682] [2020-08-18 19:30:19,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530375596] [2020-08-18 19:30:19,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,113 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 19:30:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,132 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 19:30:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,135 INFO L225 Difference]: With dead ends: 148 [2020-08-18 19:30:19,135 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 19:30:19,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 19:30:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 19:30:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 19:30:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 19:30:19,149 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 19:30:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,150 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 19:30:19,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 19:30:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:19,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,152 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] [2020-08-18 19:30:19,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:30:19,152 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 19:30:19,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10347036] [2020-08-18 19:30:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10347036] [2020-08-18 19:30:19,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609951107] [2020-08-18 19:30:19,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,207 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 19:30:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,230 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 19:30:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,233 INFO L225 Difference]: With dead ends: 244 [2020-08-18 19:30:19,233 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 19:30:19,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 19:30:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 19:30:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 19:30:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 19:30:19,249 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 19:30:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,250 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 19:30:19,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 19:30:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:19,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,252 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] [2020-08-18 19:30:19,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:30:19,253 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 19:30:19,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255932642] [2020-08-18 19:30:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255932642] [2020-08-18 19:30:19,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998256993] [2020-08-18 19:30:19,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,297 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 19:30:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,316 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 19:30:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,319 INFO L225 Difference]: With dead ends: 219 [2020-08-18 19:30:19,319 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 19:30:19,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 19:30:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 19:30:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 19:30:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 19:30:19,334 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 19:30:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,334 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 19:30:19,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 19:30:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:19,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,337 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] [2020-08-18 19:30:19,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:30:19,337 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 19:30:19,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823073632] [2020-08-18 19:30:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823073632] [2020-08-18 19:30:19,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975032465] [2020-08-18 19:30:19,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,393 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 19:30:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,431 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 19:30:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,434 INFO L225 Difference]: With dead ends: 276 [2020-08-18 19:30:19,435 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 19:30:19,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 19:30:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 19:30:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 19:30:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 19:30:19,462 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 19:30:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,463 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 19:30:19,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 19:30:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:19,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,465 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] [2020-08-18 19:30:19,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:30:19,465 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 19:30:19,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202390212] [2020-08-18 19:30:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202390212] [2020-08-18 19:30:19,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450512787] [2020-08-18 19:30:19,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,501 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 19:30:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,522 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 19:30:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,525 INFO L225 Difference]: With dead ends: 472 [2020-08-18 19:30:19,525 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 19:30:19,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 19:30:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 19:30:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 19:30:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 19:30:19,543 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 19:30:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,544 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 19:30:19,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 19:30:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,546 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] [2020-08-18 19:30:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:30:19,547 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 19:30:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208111429] [2020-08-18 19:30:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208111429] [2020-08-18 19:30:19,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887930123] [2020-08-18 19:30:19,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,604 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 19:30:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,636 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 19:30:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,639 INFO L225 Difference]: With dead ends: 420 [2020-08-18 19:30:19,639 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 19:30:19,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 19:30:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 19:30:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 19:30:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 19:30:19,658 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 19:30:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,663 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 19:30:19,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 19:30:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:19,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,671 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] [2020-08-18 19:30:19,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:30:19,671 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 19:30:19,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276876316] [2020-08-18 19:30:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276876316] [2020-08-18 19:30:19,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613769895] [2020-08-18 19:30:19,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,738 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 19:30:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,783 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 19:30:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,788 INFO L225 Difference]: With dead ends: 524 [2020-08-18 19:30:19,788 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 19:30:19,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 19:30:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 19:30:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 19:30:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 19:30:19,813 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 19:30:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,816 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 19:30:19,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 19:30:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:19,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,818 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] [2020-08-18 19:30:19,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:30:19,819 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 19:30:19,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293617349] [2020-08-18 19:30:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293617349] [2020-08-18 19:30:19,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54171392] [2020-08-18 19:30:19,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,887 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 19:30:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,931 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 19:30:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,936 INFO L225 Difference]: With dead ends: 924 [2020-08-18 19:30:19,937 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 19:30:19,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 19:30:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 19:30:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 19:30:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 19:30:19,963 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 19:30:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,964 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 19:30:19,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 19:30:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:19,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:30:19,968 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 19:30:19,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955529236] [2020-08-18 19:30:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955529236] [2020-08-18 19:30:20,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819820925] [2020-08-18 19:30:20,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,007 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 19:30:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,035 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 19:30:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,040 INFO L225 Difference]: With dead ends: 816 [2020-08-18 19:30:20,040 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 19:30:20,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 19:30:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 19:30:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 19:30:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 19:30:20,058 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 19:30:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,059 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 19:30:20,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 19:30:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:20,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:20,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:30:20,063 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 19:30:20,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218841191] [2020-08-18 19:30:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218841191] [2020-08-18 19:30:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298377547] [2020-08-18 19:30:20,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,112 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 19:30:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,149 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 19:30:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,156 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 19:30:20,156 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 19:30:20,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 19:30:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 19:30:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 19:30:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 19:30:20,186 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 19:30:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,187 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 19:30:20,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 19:30:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:20,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:20,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 19:30:20,190 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 19:30:20,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708607737] [2020-08-18 19:30:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708607737] [2020-08-18 19:30:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175872233] [2020-08-18 19:30:20,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,231 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 19:30:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,268 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 19:30:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,275 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 19:30:20,275 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 19:30:20,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 19:30:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 19:30:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 19:30:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 19:30:20,317 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 19:30:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,317 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 19:30:20,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 19:30:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:20,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,320 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] [2020-08-18 19:30:20,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 19:30:20,321 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 19:30:20,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794124889] [2020-08-18 19:30:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794124889] [2020-08-18 19:30:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834896125] [2020-08-18 19:30:20,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,359 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 19:30:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,407 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 19:30:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,413 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 19:30:20,413 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 19:30:20,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 19:30:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 19:30:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 19:30:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 19:30:20,447 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 19:30:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,448 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 19:30:20,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 19:30:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:20,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,450 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] [2020-08-18 19:30:20,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 19:30:20,450 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 19:30:20,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156232464] [2020-08-18 19:30:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156232464] [2020-08-18 19:30:20,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043371646] [2020-08-18 19:30:20,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,480 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 19:30:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,517 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 19:30:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,527 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 19:30:20,527 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 19:30:20,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 19:30:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 19:30:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 19:30:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 19:30:20,578 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 19:30:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,578 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 19:30:20,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 19:30:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:20,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,582 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] [2020-08-18 19:30:20,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 19:30:20,582 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 19:30:20,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932260339] [2020-08-18 19:30:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932260339] [2020-08-18 19:30:20,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476051051] [2020-08-18 19:30:20,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,611 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 19:30:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,660 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 19:30:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,671 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 19:30:20,671 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 19:30:20,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 19:30:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 19:30:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 19:30:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 19:30:20,742 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 19:30:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,743 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 19:30:20,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 19:30:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:20,746 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,746 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] [2020-08-18 19:30:20,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 19:30:20,747 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 19:30:20,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491833339] [2020-08-18 19:30:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491833339] [2020-08-18 19:30:20,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032163226] [2020-08-18 19:30:20,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,771 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 19:30:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,822 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 19:30:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,838 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 19:30:20,838 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 19:30:20,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 19:30:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 19:30:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 19:30:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 19:30:20,931 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 19:30:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,931 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 19:30:20,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 19:30:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,937 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] [2020-08-18 19:30:20,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 19:30:20,937 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 19:30:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293531554] [2020-08-18 19:30:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293531554] [2020-08-18 19:30:20,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135870900] [2020-08-18 19:30:20,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,965 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 19:30:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:21,086 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 19:30:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:21,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:21,112 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 19:30:21,112 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 19:30:21,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 19:30:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 19:30:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 19:30:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 19:30:21,228 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 19:30:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:21,228 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 19:30:21,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 19:30:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:21,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:21,234 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] [2020-08-18 19:30:21,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 19:30:21,235 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 19:30:21,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:21,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575573810] [2020-08-18 19:30:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:21,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575573810] [2020-08-18 19:30:21,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:21,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:21,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201639293] [2020-08-18 19:30:21,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:21,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:21,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,261 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 19:30:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:21,336 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 19:30:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:21,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:21,356 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 19:30:21,356 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 19:30:21,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 19:30:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 19:30:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 19:30:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 19:30:21,490 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 19:30:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:21,491 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 19:30:21,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 19:30:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:30:21,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:21,497 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] [2020-08-18 19:30:21,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 19:30:21,497 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 19:30:21,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:21,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560112537] [2020-08-18 19:30:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:21,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560112537] [2020-08-18 19:30:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:21,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:21,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432577146] [2020-08-18 19:30:21,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:21,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,518 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 19:30:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:21,616 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 19:30:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:21,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 19:30:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:21,636 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 19:30:21,636 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 19:30:21,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 19:30:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 19:30:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 19:30:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 19:30:21,765 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 19:30:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:21,766 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 19:30:21,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 19:30:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:30:21,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:21,772 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] [2020-08-18 19:30:21,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 19:30:21,773 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 19:30:21,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:21,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792340424] [2020-08-18 19:30:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:21,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792340424] [2020-08-18 19:30:21,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307322191] [2020-08-18 19:30:21,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:21,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,794 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 19:30:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:21,921 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 19:30:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:21,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 19:30:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:21,943 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 19:30:21,943 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 19:30:21,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 19:30:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 19:30:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 19:30:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 19:30:22,211 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 19:30:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:22,212 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 19:30:22,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 19:30:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:30:22,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:22,224 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] [2020-08-18 19:30:22,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 19:30:22,225 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 19:30:22,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:22,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029315664] [2020-08-18 19:30:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:22,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:22,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029315664] [2020-08-18 19:30:22,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:22,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:22,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486755869] [2020-08-18 19:30:22,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:22,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:22,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:22,254 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 19:30:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:22,453 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 19:30:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:22,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 19:30:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:22,474 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 19:30:22,475 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 19:30:22,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 19:30:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 19:30:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 19:30:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 19:30:22,677 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 19:30:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:22,677 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 19:30:22,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 19:30:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 19:30:22,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:22,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:22,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 19:30:22,689 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 19:30:22,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:22,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641361299] [2020-08-18 19:30:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:22,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641361299] [2020-08-18 19:30:22,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:22,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:22,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202749918] [2020-08-18 19:30:22,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:22,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:22,717 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 19:30:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:22,885 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 19:30:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:22,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 19:30:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:22,925 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 19:30:22,925 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 19:30:22,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 19:30:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 19:30:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 19:30:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 19:30:23,357 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 19:30:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:23,357 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 19:30:23,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 19:30:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 19:30:23,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:23,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:23,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 19:30:23,376 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 19:30:23,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:23,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701606435] [2020-08-18 19:30:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:23,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:23,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701606435] [2020-08-18 19:30:23,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:23,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:23,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071859565] [2020-08-18 19:30:23,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:23,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:23,414 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 19:30:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:23,605 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 19:30:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:23,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 19:30:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:23,634 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 19:30:23,634 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 19:30:23,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 19:30:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 19:30:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 19:30:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 19:30:24,216 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 19:30:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:24,217 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 19:30:24,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 19:30:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 19:30:24,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:24,238 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] [2020-08-18 19:30:24,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 19:30:24,239 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 19:30:24,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:24,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531210521] [2020-08-18 19:30:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:24,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:24,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531210521] [2020-08-18 19:30:24,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:24,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:24,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095286558] [2020-08-18 19:30:24,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:24,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:24,268 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 19:30:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:24,459 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 19:30:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:24,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 19:30:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:24,493 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 19:30:24,493 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 19:30:24,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 19:30:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 19:30:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 19:30:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 19:30:25,299 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 19:30:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:25,300 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 19:30:25,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 19:30:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 19:30:25,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:25,321 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] [2020-08-18 19:30:25,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 19:30:25,322 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 19:30:25,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:25,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090976762] [2020-08-18 19:30:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:25,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:25,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090976762] [2020-08-18 19:30:25,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:25,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:25,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031865640] [2020-08-18 19:30:25,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:25,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:25,347 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 19:30:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:25,616 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 19:30:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:25,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 19:30:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:25,673 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 19:30:25,673 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 19:30:25,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 19:30:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 19:30:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 19:30:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 19:30:26,292 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 19:30:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:26,293 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 19:30:26,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 19:30:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 19:30:26,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:26,334 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] [2020-08-18 19:30:26,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 19:30:26,335 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 19:30:26,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:26,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426949614] [2020-08-18 19:30:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:26,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:26,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426949614] [2020-08-18 19:30:26,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:26,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:26,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708815150] [2020-08-18 19:30:26,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:26,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:26,366 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 19:30:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:26,722 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 19:30:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:26,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 19:30:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:26,791 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 19:30:26,791 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 19:30:26,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 19:30:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 19:30:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 19:30:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 19:30:27,575 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 19:30:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:27,575 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 19:30:27,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 19:30:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 19:30:27,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:27,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:27,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 19:30:27,612 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 19:30:27,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:27,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295253230] [2020-08-18 19:30:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:27,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295253230] [2020-08-18 19:30:27,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:27,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:27,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624145071] [2020-08-18 19:30:27,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:27,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:27,643 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 19:30:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:27,955 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 19:30:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:27,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 19:30:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:28,028 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 19:30:28,028 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 19:30:28,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 19:30:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 19:30:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 19:30:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 19:30:29,375 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 19:30:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:29,375 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 19:30:29,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 19:30:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 19:30:29,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:29,388 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] [2020-08-18 19:30:29,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 19:30:29,389 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 19:30:29,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:29,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158677394] [2020-08-18 19:30:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:29,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158677394] [2020-08-18 19:30:29,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:29,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:29,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548139897] [2020-08-18 19:30:29,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:29,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:29,415 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 19:30:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:29,992 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 19:30:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:29,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 19:30:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:30,044 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 19:30:30,044 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 19:30:30,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 19:30:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 19:30:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 19:30:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 19:30:30,693 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 19:30:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:30,694 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 19:30:30,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 19:30:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 19:30:30,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:30,732 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] [2020-08-18 19:30:30,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 19:30:30,732 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 19:30:30,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:30,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442821659] [2020-08-18 19:30:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:30,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:30,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442821659] [2020-08-18 19:30:30,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:30,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:30,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183623714] [2020-08-18 19:30:30,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:30,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:30,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:30,752 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 19:30:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:31,846 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 19:30:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:31,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 19:30:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:31,847 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 19:30:31,847 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 19:30:31,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 19:30:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 19:30:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 19:30:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 19:30:31,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 19:30:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:31,937 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 19:30:31,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 19:30:31,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 19:30:31,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 19:30:31,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 19:30:31,975 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 19:30:31,975 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:30:31,975 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:30:31,975 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 19:30:31,975 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 19:30:31,976 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 19:30:31,976 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,977 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 19:30:31,978 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 19:30:31,978 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 19:30:31,979 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 19:30:31,981 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,981 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,981 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,982 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 19:30:31,983 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 19:30:32,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:30:32 BoogieIcfgContainer [2020-08-18 19:30:32,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:30:32,008 INFO L168 Benchmark]: Toolchain (without parser) took 14623.50 ms. Allocated memory was 138.4 MB in the beginning and 1.0 GB in the end (delta: 890.2 MB). Free memory was 100.9 MB in the beginning and 528.5 MB in the end (delta: -427.6 MB). Peak memory consumption was 462.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,015 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.35 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 89.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,015 INFO L168 Benchmark]: Boogie Preprocessor took 115.53 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 178.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,016 INFO L168 Benchmark]: RCFGBuilder took 403.43 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 157.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,016 INFO L168 Benchmark]: TraceAbstraction took 13815.10 ms. Allocated memory was 200.8 MB in the beginning and 1.0 GB in the end (delta: 827.9 MB). Free memory was 157.7 MB in the beginning and 528.5 MB in the end (delta: -370.8 MB). Peak memory consumption was 457.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:32,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.35 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 89.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.53 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 178.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.43 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 157.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13815.10 ms. Allocated memory was 200.8 MB in the beginning and 1.0 GB in the end (delta: 827.9 MB). Free memory was 157.7 MB in the beginning and 528.5 MB in the end (delta: -370.8 MB). Peak memory consumption was 457.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.6s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.4s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...