/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:19:23,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:19:23,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:19:23,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:19:23,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:19:23,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:19:23,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:19:23,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:19:23,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:19:23,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:19:23,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:19:23,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:19:23,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:19:23,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:19:23,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:19:23,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:19:23,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:19:23,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:19:23,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:19:23,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:19:23,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:19:23,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:19:23,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:19:23,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:19:23,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:19:23,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:19:23,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:19:23,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:19:23,491 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 [2020-08-21 13:19:23,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:19:23,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:19:23,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:19:23,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:19:23,547 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:19:23,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:19:23,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:19:23,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:19:23,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:19:23,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:19:23,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:19:23,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:19:23,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:19:23,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:19:23,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:19:23,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:19:23,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:23,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:19:23,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:19:23,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:19:23,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:19:23,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:19:23,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:19:23,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:19:23,555 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 -> false [2020-08-21 13:19:23,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:19:23,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:19:23,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:19:23,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:19:23,912 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:19:23,913 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 13:19:23,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1bbc90dc/c15e491e86b744f08efa8eb2e401e609/FLAG7e0b95aab [2020-08-21 13:19:24,451 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:19:24,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 13:19:24,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1bbc90dc/c15e491e86b744f08efa8eb2e401e609/FLAG7e0b95aab [2020-08-21 13:19:24,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1bbc90dc/c15e491e86b744f08efa8eb2e401e609 [2020-08-21 13:19:24,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:19:24,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:19:24,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:24,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:19:24,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:19:24,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:24" (1/1) ... [2020-08-21 13:19:24,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763ad0aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:24, skipping insertion in model container [2020-08-21 13:19:24,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:24" (1/1) ... [2020-08-21 13:19:24,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:19:24,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:19:25,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:25,104 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:19:25,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:25,148 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:19:25,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25 WrapperNode [2020-08-21 13:19:25,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:25,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:19:25,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:19:25,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:19:25,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (1/1) ... [2020-08-21 13:19:25,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:19:25,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:19:25,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:19:25,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:19:25,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (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 [2020-08-21 13:19:25,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:19:25,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:19:25,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:19:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:19:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:19:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:19:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:19:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:19:25,635 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:19:25,635 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:19:25,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:25 BoogieIcfgContainer [2020-08-21 13:19:25,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:19:25,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:19:25,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:19:25,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:19:25,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:19:24" (1/3) ... [2020-08-21 13:19:25,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b8721b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:25, skipping insertion in model container [2020-08-21 13:19:25,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:25" (2/3) ... [2020-08-21 13:19:25,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b8721b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:25, skipping insertion in model container [2020-08-21 13:19:25,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:25" (3/3) ... [2020-08-21 13:19:25,650 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-21 13:19:25,663 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:19:25,677 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:19:25,707 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:19:25,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:19:25,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:19:25,731 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:19:25,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:19:25,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:19:25,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:19:25,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:19:25,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:19:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-21 13:19:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 13:19:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:25,765 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] [2020-08-21 13:19:25,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-21 13:19:25,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:25,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767221107] [2020-08-21 13:19:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:25,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:25,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767221107] [2020-08-21 13:19:25,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:25,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:25,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137707398] [2020-08-21 13:19:25,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:25,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,003 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-21 13:19:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,068 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-21 13:19:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 13:19:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,083 INFO L225 Difference]: With dead ends: 93 [2020-08-21 13:19:26,084 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:19:26,087 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 [2020-08-21 13:19:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:19:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-21 13:19:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:19:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-21 13:19:26,128 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-21 13:19:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,129 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-21 13:19:26,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-21 13:19:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 13:19:26,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,131 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] [2020-08-21 13:19:26,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:19:26,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-21 13:19:26,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376797067] [2020-08-21 13:19:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376797067] [2020-08-21 13:19:26,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416070095] [2020-08-21 13:19:26,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,229 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-21 13:19:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,258 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-21 13:19:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 13:19:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,261 INFO L225 Difference]: With dead ends: 127 [2020-08-21 13:19:26,261 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:19:26,263 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 [2020-08-21 13:19:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:19:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 13:19:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 13:19:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-21 13:19:26,275 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-21 13:19:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,276 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-21 13:19:26,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-21 13:19:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:26,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,277 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] [2020-08-21 13:19:26,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:19:26,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-21 13:19:26,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769109483] [2020-08-21 13:19:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769109483] [2020-08-21 13:19:26,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792210414] [2020-08-21 13:19:26,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,345 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-21 13:19:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,391 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-21 13:19:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,396 INFO L225 Difference]: With dead ends: 117 [2020-08-21 13:19:26,396 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 13:19:26,397 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 [2020-08-21 13:19:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 13:19:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-21 13:19:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 13:19:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-21 13:19:26,421 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-21 13:19:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,422 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-21 13:19:26,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-21 13:19:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:26,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,428 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] [2020-08-21 13:19:26,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:19:26,428 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-21 13:19:26,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957552816] [2020-08-21 13:19:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957552816] [2020-08-21 13:19:26,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387630155] [2020-08-21 13:19:26,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,505 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-21 13:19:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,533 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-21 13:19:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,535 INFO L225 Difference]: With dead ends: 148 [2020-08-21 13:19:26,536 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 13:19:26,536 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 [2020-08-21 13:19:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 13:19:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-21 13:19:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 13:19:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-21 13:19:26,557 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-21 13:19:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,558 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-21 13:19:26,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-21 13:19:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:26,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,562 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] [2020-08-21 13:19:26,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:19:26,563 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-21 13:19:26,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537249129] [2020-08-21 13:19:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537249129] [2020-08-21 13:19:26,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494537899] [2020-08-21 13:19:26,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,610 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-21 13:19:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,631 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-21 13:19:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,634 INFO L225 Difference]: With dead ends: 244 [2020-08-21 13:19:26,634 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 13:19:26,636 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 [2020-08-21 13:19:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 13:19:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-21 13:19:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 13:19:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-21 13:19:26,652 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-21 13:19:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,652 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-21 13:19:26,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-21 13:19:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:26,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,655 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] [2020-08-21 13:19:26,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:19:26,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-21 13:19:26,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321587430] [2020-08-21 13:19:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321587430] [2020-08-21 13:19:26,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724196285] [2020-08-21 13:19:26,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,695 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-21 13:19:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,730 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-21 13:19:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,733 INFO L225 Difference]: With dead ends: 219 [2020-08-21 13:19:26,733 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 13:19:26,734 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 [2020-08-21 13:19:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 13:19:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-21 13:19:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-21 13:19:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-21 13:19:26,760 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-21 13:19:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,761 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-21 13:19:26,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-21 13:19:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:26,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,763 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] [2020-08-21 13:19:26,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:19:26,765 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-21 13:19:26,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177961064] [2020-08-21 13:19:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177961064] [2020-08-21 13:19:26,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809813647] [2020-08-21 13:19:26,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,815 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-21 13:19:26,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,833 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-21 13:19:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,836 INFO L225 Difference]: With dead ends: 276 [2020-08-21 13:19:26,836 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 13:19:26,837 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 [2020-08-21 13:19:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 13:19:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-21 13:19:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 13:19:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-21 13:19:26,850 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-21 13:19:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,850 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-21 13:19:26,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-21 13:19:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:26,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,852 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] [2020-08-21 13:19:26,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:19:26,853 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-21 13:19:26,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252036670] [2020-08-21 13:19:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252036670] [2020-08-21 13:19:26,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854656837] [2020-08-21 13:19:26,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,887 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-21 13:19:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,909 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-21 13:19:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,911 INFO L225 Difference]: With dead ends: 472 [2020-08-21 13:19:26,912 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 13:19:26,913 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 [2020-08-21 13:19:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 13:19:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-21 13:19:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-21 13:19:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-21 13:19:26,928 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-21 13:19:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,928 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-21 13:19:26,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-21 13:19:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:26,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:26,930 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] [2020-08-21 13:19:26,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:19:26,931 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-21 13:19:26,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:26,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241375401] [2020-08-21 13:19:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:26,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241375401] [2020-08-21 13:19:26,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:26,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:26,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395440919] [2020-08-21 13:19:26,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:26,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:26,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:26,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:26,961 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-21 13:19:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:26,980 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-21 13:19:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:26,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:26,983 INFO L225 Difference]: With dead ends: 420 [2020-08-21 13:19:26,983 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 13:19:26,985 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 [2020-08-21 13:19:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 13:19:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-21 13:19:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 13:19:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-21 13:19:26,997 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-21 13:19:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:26,997 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-21 13:19:26,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-21 13:19:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:26,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,000 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] [2020-08-21 13:19:27,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:19:27,000 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-21 13:19:27,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285754482] [2020-08-21 13:19:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285754482] [2020-08-21 13:19:27,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85655796] [2020-08-21 13:19:27,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,033 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-21 13:19:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,054 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-21 13:19:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,058 INFO L225 Difference]: With dead ends: 524 [2020-08-21 13:19:27,058 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 13:19:27,059 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 [2020-08-21 13:19:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 13:19:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-21 13:19:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 13:19:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-21 13:19:27,085 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-21 13:19:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,085 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-21 13:19:27,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-21 13:19:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:27,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,091 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] [2020-08-21 13:19:27,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:19:27,091 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-21 13:19:27,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647240832] [2020-08-21 13:19:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647240832] [2020-08-21 13:19:27,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634511538] [2020-08-21 13:19:27,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,150 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-21 13:19:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,191 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-21 13:19:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,196 INFO L225 Difference]: With dead ends: 924 [2020-08-21 13:19:27,196 INFO L226 Difference]: Without dead ends: 546 [2020-08-21 13:19:27,198 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 [2020-08-21 13:19:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-21 13:19:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-21 13:19:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-21 13:19:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-21 13:19:27,219 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-21 13:19:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,219 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-21 13:19:27,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-21 13:19:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:27,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,223 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] [2020-08-21 13:19:27,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:19:27,224 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,224 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-21 13:19:27,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234762932] [2020-08-21 13:19:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234762932] [2020-08-21 13:19:27,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164288038] [2020-08-21 13:19:27,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,262 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-21 13:19:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,290 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-21 13:19:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,295 INFO L225 Difference]: With dead ends: 816 [2020-08-21 13:19:27,295 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 13:19:27,297 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 [2020-08-21 13:19:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 13:19:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-21 13:19:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-21 13:19:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-21 13:19:27,316 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-21 13:19:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,316 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-21 13:19:27,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-21 13:19:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:27,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,317 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] [2020-08-21 13:19:27,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:19:27,318 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-21 13:19:27,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691483299] [2020-08-21 13:19:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691483299] [2020-08-21 13:19:27,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876131334] [2020-08-21 13:19:27,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,361 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-21 13:19:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,401 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-21 13:19:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,410 INFO L225 Difference]: With dead ends: 1004 [2020-08-21 13:19:27,410 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 13:19:27,411 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 [2020-08-21 13:19:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 13:19:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-21 13:19:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 13:19:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-21 13:19:27,440 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-21 13:19:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,440 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-21 13:19:27,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-21 13:19:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:27,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,443 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] [2020-08-21 13:19:27,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:19:27,443 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-21 13:19:27,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413852828] [2020-08-21 13:19:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413852828] [2020-08-21 13:19:27,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017617939] [2020-08-21 13:19:27,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,493 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-21 13:19:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,537 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-21 13:19:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,545 INFO L225 Difference]: With dead ends: 1820 [2020-08-21 13:19:27,545 INFO L226 Difference]: Without dead ends: 1066 [2020-08-21 13:19:27,549 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 [2020-08-21 13:19:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-21 13:19:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-21 13:19:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-21 13:19:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-21 13:19:27,598 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-21 13:19:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,599 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-21 13:19:27,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-21 13:19:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:27,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,604 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] [2020-08-21 13:19:27,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:19:27,604 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-21 13:19:27,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368005173] [2020-08-21 13:19:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368005173] [2020-08-21 13:19:27,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654519310] [2020-08-21 13:19:27,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,652 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-21 13:19:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,681 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-21 13:19:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,688 INFO L225 Difference]: With dead ends: 1596 [2020-08-21 13:19:27,688 INFO L226 Difference]: Without dead ends: 1082 [2020-08-21 13:19:27,691 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 [2020-08-21 13:19:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-21 13:19:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-21 13:19:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-21 13:19:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-21 13:19:27,722 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-21 13:19:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,723 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-21 13:19:27,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-21 13:19:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:27,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,725 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] [2020-08-21 13:19:27,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:19:27,725 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-21 13:19:27,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306853883] [2020-08-21 13:19:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306853883] [2020-08-21 13:19:27,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369961562] [2020-08-21 13:19:27,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,750 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-21 13:19:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,784 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-21 13:19:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,795 INFO L225 Difference]: With dead ends: 1932 [2020-08-21 13:19:27,796 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 13:19:27,797 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 [2020-08-21 13:19:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 13:19:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-21 13:19:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 13:19:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-21 13:19:27,843 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-21 13:19:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,843 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-21 13:19:27,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-21 13:19:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:27,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,846 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] [2020-08-21 13:19:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:19:27,846 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-21 13:19:27,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563353382] [2020-08-21 13:19:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563353382] [2020-08-21 13:19:27,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:27,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:27,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143331228] [2020-08-21 13:19:27,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:27,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:27,867 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-21 13:19:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:27,916 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-21 13:19:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:27,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:27,927 INFO L225 Difference]: With dead ends: 3596 [2020-08-21 13:19:27,927 INFO L226 Difference]: Without dead ends: 2090 [2020-08-21 13:19:27,930 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 [2020-08-21 13:19:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-21 13:19:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-21 13:19:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-21 13:19:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-21 13:19:27,992 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-21 13:19:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:27,992 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-21 13:19:27,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-21 13:19:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:19:27,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:27,995 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] [2020-08-21 13:19:27,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:19:27,995 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-21 13:19:27,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:27,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901120746] [2020-08-21 13:19:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:28,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901120746] [2020-08-21 13:19:28,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:28,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:28,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665494136] [2020-08-21 13:19:28,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:28,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:28,026 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-21 13:19:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:28,080 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-21 13:19:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:28,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 13:19:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:28,096 INFO L225 Difference]: With dead ends: 3132 [2020-08-21 13:19:28,096 INFO L226 Difference]: Without dead ends: 2122 [2020-08-21 13:19:28,100 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 [2020-08-21 13:19:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-21 13:19:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-21 13:19:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-21 13:19:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-21 13:19:28,198 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-21 13:19:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:28,198 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-21 13:19:28,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-21 13:19:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:19:28,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:28,203 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] [2020-08-21 13:19:28,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:19:28,203 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-21 13:19:28,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:28,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470529914] [2020-08-21 13:19:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:28,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470529914] [2020-08-21 13:19:28,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:28,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:28,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172530464] [2020-08-21 13:19:28,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:28,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:28,229 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-21 13:19:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:28,296 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-21 13:19:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:28,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 13:19:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:28,319 INFO L225 Difference]: With dead ends: 3724 [2020-08-21 13:19:28,320 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 13:19:28,321 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 [2020-08-21 13:19:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 13:19:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-21 13:19:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-21 13:19:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-21 13:19:28,424 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-21 13:19:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:28,424 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-21 13:19:28,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-21 13:19:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:19:28,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:28,429 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] [2020-08-21 13:19:28,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:19:28,430 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-21 13:19:28,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:28,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096423207] [2020-08-21 13:19:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:28,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096423207] [2020-08-21 13:19:28,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:28,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:28,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263347844] [2020-08-21 13:19:28,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:28,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:28,462 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-21 13:19:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:28,529 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-21 13:19:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:28,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 13:19:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:28,549 INFO L225 Difference]: With dead ends: 7116 [2020-08-21 13:19:28,550 INFO L226 Difference]: Without dead ends: 4106 [2020-08-21 13:19:28,555 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 [2020-08-21 13:19:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-21 13:19:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-21 13:19:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-21 13:19:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-21 13:19:28,667 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-21 13:19:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:28,693 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-21 13:19:28,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-21 13:19:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:19:28,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:28,697 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] [2020-08-21 13:19:28,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:19:28,698 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-21 13:19:28,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:28,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296656707] [2020-08-21 13:19:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:28,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296656707] [2020-08-21 13:19:28,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:28,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:28,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863159163] [2020-08-21 13:19:28,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:28,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:28,726 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-21 13:19:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:28,800 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-21 13:19:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:28,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 13:19:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:28,844 INFO L225 Difference]: With dead ends: 6156 [2020-08-21 13:19:28,844 INFO L226 Difference]: Without dead ends: 4170 [2020-08-21 13:19:28,851 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 [2020-08-21 13:19:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-21 13:19:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-21 13:19:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-21 13:19:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-21 13:19:28,970 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-21 13:19:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:28,970 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-21 13:19:28,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-21 13:19:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:19:28,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:28,975 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] [2020-08-21 13:19:28,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:19:28,975 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-21 13:19:28,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:28,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944352102] [2020-08-21 13:19:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:29,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944352102] [2020-08-21 13:19:29,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:29,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:29,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094297169] [2020-08-21 13:19:29,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:29,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:29,005 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-21 13:19:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:29,122 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-21 13:19:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:29,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 13:19:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:29,146 INFO L225 Difference]: With dead ends: 12108 [2020-08-21 13:19:29,147 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 13:19:29,156 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 [2020-08-21 13:19:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 13:19:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-21 13:19:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 13:19:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-21 13:19:29,416 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-21 13:19:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:29,417 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-21 13:19:29,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-21 13:19:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:19:29,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:29,426 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] [2020-08-21 13:19:29,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:19:29,426 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:29,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-21 13:19:29,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:29,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605938061] [2020-08-21 13:19:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:29,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605938061] [2020-08-21 13:19:29,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:29,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:29,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697728847] [2020-08-21 13:19:29,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:29,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:29,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:29,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:29,456 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-21 13:19:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:29,569 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-21 13:19:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:29,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 13:19:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:29,588 INFO L225 Difference]: With dead ends: 9100 [2020-08-21 13:19:29,588 INFO L226 Difference]: Without dead ends: 9098 [2020-08-21 13:19:29,592 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 [2020-08-21 13:19:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-21 13:19:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-21 13:19:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 13:19:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-21 13:19:29,794 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-21 13:19:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:29,795 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-21 13:19:29,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-21 13:19:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 13:19:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:29,806 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] [2020-08-21 13:19:29,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:19:29,806 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-21 13:19:29,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:29,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246405979] [2020-08-21 13:19:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:29,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246405979] [2020-08-21 13:19:29,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:29,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:29,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829686194] [2020-08-21 13:19:29,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:29,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:29,832 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-21 13:19:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:30,053 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-21 13:19:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:30,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 13:19:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:30,084 INFO L225 Difference]: With dead ends: 13708 [2020-08-21 13:19:30,084 INFO L226 Difference]: Without dead ends: 13706 [2020-08-21 13:19:30,089 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 [2020-08-21 13:19:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-21 13:19:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-21 13:19:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-21 13:19:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-21 13:19:30,339 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-21 13:19:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:30,339 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-21 13:19:30,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-21 13:19:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 13:19:30,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:30,356 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] [2020-08-21 13:19:30,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:19:30,356 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-21 13:19:30,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:30,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785068856] [2020-08-21 13:19:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:30,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785068856] [2020-08-21 13:19:30,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:30,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:30,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699020181] [2020-08-21 13:19:30,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:30,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:30,378 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-21 13:19:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:30,680 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-21 13:19:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:30,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 13:19:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:30,710 INFO L225 Difference]: With dead ends: 27788 [2020-08-21 13:19:30,711 INFO L226 Difference]: Without dead ends: 15754 [2020-08-21 13:19:30,731 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 [2020-08-21 13:19:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-21 13:19:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-21 13:19:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-21 13:19:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-21 13:19:31,079 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-21 13:19:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:31,080 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-21 13:19:31,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-21 13:19:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:19:31,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:31,186 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] [2020-08-21 13:19:31,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:19:31,186 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-21 13:19:31,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:31,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226910256] [2020-08-21 13:19:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:31,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226910256] [2020-08-21 13:19:31,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:31,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:31,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233173554] [2020-08-21 13:19:31,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:31,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:31,216 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-21 13:19:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:31,389 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-21 13:19:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:31,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 13:19:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:31,425 INFO L225 Difference]: With dead ends: 23820 [2020-08-21 13:19:31,425 INFO L226 Difference]: Without dead ends: 16138 [2020-08-21 13:19:31,443 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 [2020-08-21 13:19:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-21 13:19:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-21 13:19:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-21 13:19:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-21 13:19:31,718 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-21 13:19:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:31,718 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-21 13:19:31,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-21 13:19:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:19:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:31,734 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] [2020-08-21 13:19:31,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 13:19:31,734 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:31,735 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-21 13:19:31,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:31,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330387238] [2020-08-21 13:19:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:31,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330387238] [2020-08-21 13:19:31,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:31,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975381023] [2020-08-21 13:19:31,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:31,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:31,763 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-21 13:19:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:32,113 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-21 13:19:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:32,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 13:19:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:32,162 INFO L225 Difference]: With dead ends: 26636 [2020-08-21 13:19:32,162 INFO L226 Difference]: Without dead ends: 26634 [2020-08-21 13:19:32,169 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 [2020-08-21 13:19:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-21 13:19:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-21 13:19:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-21 13:19:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-21 13:19:33,324 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-21 13:19:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,325 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-21 13:19:33,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-21 13:19:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:19:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:33,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 13:19:33,358 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-21 13:19:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867624012] [2020-08-21 13:19:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867624012] [2020-08-21 13:19:33,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448740939] [2020-08-21 13:19:33,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,380 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-21 13:19:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,720 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-21 13:19:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 13:19:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,759 INFO L225 Difference]: With dead ends: 55308 [2020-08-21 13:19:33,760 INFO L226 Difference]: Without dead ends: 31242 [2020-08-21 13:19:33,802 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 [2020-08-21 13:19:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-21 13:19:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-21 13:19:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-21 13:19:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-21 13:19:34,499 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-21 13:19:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,499 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-21 13:19:34,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-21 13:19:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:19:34,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,523 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] [2020-08-21 13:19:34,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 13:19:34,523 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-21 13:19:34,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718931287] [2020-08-21 13:19:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718931287] [2020-08-21 13:19:34,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649361586] [2020-08-21 13:19:34,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,545 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-21 13:19:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,816 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-21 13:19:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 13:19:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,851 INFO L225 Difference]: With dead ends: 46860 [2020-08-21 13:19:34,851 INFO L226 Difference]: Without dead ends: 31754 [2020-08-21 13:19:34,878 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 [2020-08-21 13:19:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-21 13:19:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-21 13:19:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-21 13:19:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-21 13:19:35,558 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-21 13:19:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,558 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-21 13:19:35,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-21 13:19:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:19:35,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,603 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] [2020-08-21 13:19:35,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 13:19:35,604 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-21 13:19:35,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632051419] [2020-08-21 13:19:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:35,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632051419] [2020-08-21 13:19:35,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:35,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:35,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168934170] [2020-08-21 13:19:35,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:35,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:35,623 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-21 13:19:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:36,098 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-21 13:19:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:36,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 13:19:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:36,163 INFO L225 Difference]: With dead ends: 51210 [2020-08-21 13:19:36,163 INFO L226 Difference]: Without dead ends: 51208 [2020-08-21 13:19:36,182 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 [2020-08-21 13:19:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-21 13:19:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-21 13:19:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-21 13:19:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-21 13:19:37,143 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-21 13:19:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:37,144 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-21 13:19:37,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-21 13:19:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:19:37,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:37,177 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] [2020-08-21 13:19:37,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 13:19:37,178 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-21 13:19:37,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:37,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802595812] [2020-08-21 13:19:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:37,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802595812] [2020-08-21 13:19:37,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:37,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:37,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42727839] [2020-08-21 13:19:37,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:37,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:37,202 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-21 13:19:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:37,898 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-21 13:19:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:37,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 13:19:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:37,899 INFO L225 Difference]: With dead ends: 109576 [2020-08-21 13:19:37,899 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:19:37,982 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 [2020-08-21 13:19:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:19:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:19:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:19:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:19:37,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-21 13:19:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:37,983 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:19:37,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:19:37,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:19:37,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 13:19:37,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:19:38,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:19:38,016 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:38,016 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:38,016 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:19:38,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:19:38,016 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,017 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,018 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-21 13:19:38,019 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,020 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-21 13:19:38,020 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,020 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,020 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-21 13:19:38,020 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,021 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,022 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 13:19:38,023 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-21 13:19:38,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:38 BoogieIcfgContainer [2020-08-21 13:19:38,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:19:38,047 INFO L168 Benchmark]: Toolchain (without parser) took 13218.85 ms. Allocated memory was 140.5 MB in the beginning and 1.1 GB in the end (delta: 912.8 MB). Free memory was 103.6 MB in the beginning and 675.6 MB in the end (delta: -572.0 MB). Peak memory consumption was 340.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,053 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.75 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 92.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,054 INFO L168 Benchmark]: Boogie Preprocessor took 113.24 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,054 INFO L168 Benchmark]: RCFGBuilder took 376.97 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,055 INFO L168 Benchmark]: TraceAbstraction took 12402.34 ms. Allocated memory was 202.4 MB in the beginning and 1.1 GB in the end (delta: 850.9 MB). Free memory was 159.1 MB in the beginning and 675.6 MB in the end (delta: -516.5 MB). Peak memory consumption was 334.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:38,058 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.75 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 92.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.24 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.97 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12402.34 ms. Allocated memory was 202.4 MB in the beginning and 1.1 GB in the end (delta: 850.9 MB). Free memory was 159.1 MB in the beginning and 675.6 MB in the end (delta: -516.5 MB). Peak memory consumption was 334.4 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: 12.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 4.7s, 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: 5.6s 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, 0.6s 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...