/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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:40,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:40,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:40,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:40,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:40,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:40,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:40,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:40,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:40,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:40,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:40,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:40,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:40,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:40,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:40,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:40,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:40,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:41,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:41,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:41,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:41,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:41,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:41,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:41,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:41,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:41,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:41,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:41,038 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 [2020-09-21 10:20:41,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:41,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:41,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:41,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:41,099 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:41,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:41,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:41,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:41,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:41,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:41,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:41,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:41,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:41,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:41,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:41,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:41,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:41,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:41,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:41,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:41,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:41,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:41,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:41,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:41,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:41,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:41,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:41,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:41,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:41,105 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 [2020-09-21 10:20:41,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:41,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:41,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:41,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:41,665 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:41,666 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-09-21 10:20:41,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb61c1d63/ce035e351bab441ea127b833f3d5055c/FLAG24472dea8 [2020-09-21 10:20:42,319 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:42,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-09-21 10:20:42,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb61c1d63/ce035e351bab441ea127b833f3d5055c/FLAG24472dea8 [2020-09-21 10:20:42,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb61c1d63/ce035e351bab441ea127b833f3d5055c [2020-09-21 10:20:42,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:42,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:42,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:42,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:42,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:42,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:42" (1/1) ... [2020-09-21 10:20:42,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66df4aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:42, skipping insertion in model container [2020-09-21 10:20:42,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:42" (1/1) ... [2020-09-21 10:20:42,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:42,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:42,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:42,937 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:42,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:42,999 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:43,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43 WrapperNode [2020-09-21 10:20:43,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:43,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:43,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:43,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:43,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (1/1) ... [2020-09-21 10:20:43,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:43,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:43,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:43,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:43,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (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 [2020-09-21 10:20:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:43,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:43,605 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:43,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:43 BoogieIcfgContainer [2020-09-21 10:20:43,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:43,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:43,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:43,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:43,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:42" (1/3) ... [2020-09-21 10:20:43,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d094c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:43, skipping insertion in model container [2020-09-21 10:20:43,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:43" (2/3) ... [2020-09-21 10:20:43,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d094c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:43, skipping insertion in model container [2020-09-21 10:20:43,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:43" (3/3) ... [2020-09-21 10:20:43,639 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-09-21 10:20:43,650 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:43,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:43,688 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:43,721 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:43,721 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:43,722 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:43,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:43,722 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:43,722 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:43,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:43,723 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-21 10:20:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:43,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-09-21 10:20:43,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163228514] [2020-09-21 10:20:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163228514] [2020-09-21 10:20:44,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673666765] [2020-09-21 10:20:44,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,033 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-09-21 10:20:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,097 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-09-21 10:20:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,115 INFO L225 Difference]: With dead ends: 75 [2020-09-21 10:20:44,115 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 10:20:44,120 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 [2020-09-21 10:20:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 10:20:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-09-21 10:20:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:20:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-09-21 10:20:44,173 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-09-21 10:20:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,174 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-09-21 10:20:44,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-09-21 10:20:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:44,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:44,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-09-21 10:20:44,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262231886] [2020-09-21 10:20:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262231886] [2020-09-21 10:20:44,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348898464] [2020-09-21 10:20:44,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,249 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-09-21 10:20:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,280 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-09-21 10:20:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,283 INFO L225 Difference]: With dead ends: 97 [2020-09-21 10:20:44,283 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 10:20:44,285 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 [2020-09-21 10:20:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 10:20:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-09-21 10:20:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 10:20:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-09-21 10:20:44,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-09-21 10:20:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,296 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-09-21 10:20:44,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-09-21 10:20:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:44,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:44,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-09-21 10:20:44,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44568043] [2020-09-21 10:20:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44568043] [2020-09-21 10:20:44,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683902109] [2020-09-21 10:20:44,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,379 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-09-21 10:20:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,402 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-09-21 10:20:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,405 INFO L225 Difference]: With dead ends: 90 [2020-09-21 10:20:44,405 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 10:20:44,406 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 [2020-09-21 10:20:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 10:20:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-21 10:20:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 10:20:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-09-21 10:20:44,416 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-09-21 10:20:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,416 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-09-21 10:20:44,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-09-21 10:20:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:44,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:44,419 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-09-21 10:20:44,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586386438] [2020-09-21 10:20:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586386438] [2020-09-21 10:20:44,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756434036] [2020-09-21 10:20:44,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,472 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-09-21 10:20:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,494 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-09-21 10:20:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,496 INFO L225 Difference]: With dead ends: 112 [2020-09-21 10:20:44,496 INFO L226 Difference]: Without dead ends: 110 [2020-09-21 10:20:44,497 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 [2020-09-21 10:20:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-21 10:20:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-09-21 10:20:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-21 10:20:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-09-21 10:20:44,509 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-09-21 10:20:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,510 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-09-21 10:20:44,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-09-21 10:20:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:44,512 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-09-21 10:20:44,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027391056] [2020-09-21 10:20:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027391056] [2020-09-21 10:20:44,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949000979] [2020-09-21 10:20:44,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,568 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-09-21 10:20:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,611 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-09-21 10:20:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,614 INFO L225 Difference]: With dead ends: 184 [2020-09-21 10:20:44,614 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 10:20:44,616 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 [2020-09-21 10:20:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 10:20:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-09-21 10:20:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-21 10:20:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-09-21 10:20:44,629 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-09-21 10:20:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,630 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-09-21 10:20:44,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-09-21 10:20:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:44,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,632 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] [2020-09-21 10:20:44,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:44,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-09-21 10:20:44,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233670396] [2020-09-21 10:20:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233670396] [2020-09-21 10:20:44,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648992653] [2020-09-21 10:20:44,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,680 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-09-21 10:20:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,701 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-09-21 10:20:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,703 INFO L225 Difference]: With dead ends: 165 [2020-09-21 10:20:44,704 INFO L226 Difference]: Without dead ends: 114 [2020-09-21 10:20:44,705 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 [2020-09-21 10:20:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-21 10:20:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-09-21 10:20:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-21 10:20:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-09-21 10:20:44,718 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-09-21 10:20:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,718 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-09-21 10:20:44,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-09-21 10:20:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:44,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,720 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] [2020-09-21 10:20:44,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:44,721 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-09-21 10:20:44,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491755253] [2020-09-21 10:20:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491755253] [2020-09-21 10:20:44,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961803610] [2020-09-21 10:20:44,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,765 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-09-21 10:20:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,786 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-09-21 10:20:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,789 INFO L225 Difference]: With dead ends: 204 [2020-09-21 10:20:44,789 INFO L226 Difference]: Without dead ends: 202 [2020-09-21 10:20:44,790 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 [2020-09-21 10:20:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-21 10:20:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-09-21 10:20:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-21 10:20:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-09-21 10:20:44,805 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-09-21 10:20:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,805 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-09-21 10:20:44,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-09-21 10:20:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:44,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,808 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] [2020-09-21 10:20:44,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:44,808 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-09-21 10:20:44,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418019424] [2020-09-21 10:20:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418019424] [2020-09-21 10:20:44,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482656981] [2020-09-21 10:20:44,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,882 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-09-21 10:20:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,928 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-09-21 10:20:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:44,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,930 INFO L225 Difference]: With dead ends: 352 [2020-09-21 10:20:44,930 INFO L226 Difference]: Without dead ends: 210 [2020-09-21 10:20:44,933 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 [2020-09-21 10:20:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-21 10:20:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-09-21 10:20:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-09-21 10:20:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-09-21 10:20:44,967 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-09-21 10:20:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,967 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-09-21 10:20:44,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-09-21 10:20:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:44,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,970 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] [2020-09-21 10:20:44,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:44,970 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-09-21 10:20:44,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917076360] [2020-09-21 10:20:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917076360] [2020-09-21 10:20:45,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9348239] [2020-09-21 10:20:45,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,018 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-09-21 10:20:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,038 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-09-21 10:20:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,040 INFO L225 Difference]: With dead ends: 312 [2020-09-21 10:20:45,040 INFO L226 Difference]: Without dead ends: 214 [2020-09-21 10:20:45,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-21 10:20:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-09-21 10:20:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-21 10:20:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-09-21 10:20:45,052 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-09-21 10:20:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,052 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-09-21 10:20:45,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-09-21 10:20:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:45,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,054 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] [2020-09-21 10:20:45,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:45,055 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-09-21 10:20:45,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971975158] [2020-09-21 10:20:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971975158] [2020-09-21 10:20:45,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526120908] [2020-09-21 10:20:45,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,086 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-09-21 10:20:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,108 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-09-21 10:20:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,111 INFO L225 Difference]: With dead ends: 380 [2020-09-21 10:20:45,111 INFO L226 Difference]: Without dead ends: 378 [2020-09-21 10:20:45,112 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 [2020-09-21 10:20:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-09-21 10:20:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-09-21 10:20:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-21 10:20:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-09-21 10:20:45,129 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-09-21 10:20:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,130 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-09-21 10:20:45,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-09-21 10:20:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:45,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,139 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] [2020-09-21 10:20:45,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:45,140 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-09-21 10:20:45,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612239717] [2020-09-21 10:20:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612239717] [2020-09-21 10:20:45,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132693398] [2020-09-21 10:20:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,191 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-09-21 10:20:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,230 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-09-21 10:20:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,234 INFO L225 Difference]: With dead ends: 684 [2020-09-21 10:20:45,234 INFO L226 Difference]: Without dead ends: 402 [2020-09-21 10:20:45,236 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 [2020-09-21 10:20:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-09-21 10:20:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-09-21 10:20:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-09-21 10:20:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-09-21 10:20:45,262 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-09-21 10:20:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,262 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-09-21 10:20:45,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-09-21 10:20:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:45,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,266 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] [2020-09-21 10:20:45,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:45,267 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-09-21 10:20:45,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9983573] [2020-09-21 10:20:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9983573] [2020-09-21 10:20:45,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674372159] [2020-09-21 10:20:45,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,319 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-09-21 10:20:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,343 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-09-21 10:20:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,346 INFO L225 Difference]: With dead ends: 600 [2020-09-21 10:20:45,346 INFO L226 Difference]: Without dead ends: 410 [2020-09-21 10:20:45,347 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 [2020-09-21 10:20:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-09-21 10:20:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-09-21 10:20:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-09-21 10:20:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-09-21 10:20:45,360 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-09-21 10:20:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,360 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-09-21 10:20:45,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-09-21 10:20:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:45,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,362 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] [2020-09-21 10:20:45,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:45,362 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-09-21 10:20:45,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985008977] [2020-09-21 10:20:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985008977] [2020-09-21 10:20:45,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359392671] [2020-09-21 10:20:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,389 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-09-21 10:20:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,416 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-09-21 10:20:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,420 INFO L225 Difference]: With dead ends: 716 [2020-09-21 10:20:45,421 INFO L226 Difference]: Without dead ends: 714 [2020-09-21 10:20:45,421 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 [2020-09-21 10:20:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-09-21 10:20:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-09-21 10:20:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-09-21 10:20:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-09-21 10:20:45,438 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-09-21 10:20:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,439 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-09-21 10:20:45,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-09-21 10:20:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:45,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,441 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] [2020-09-21 10:20:45,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:45,441 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-09-21 10:20:45,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684340274] [2020-09-21 10:20:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684340274] [2020-09-21 10:20:45,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345947810] [2020-09-21 10:20:45,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,471 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-09-21 10:20:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,498 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-09-21 10:20:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,503 INFO L225 Difference]: With dead ends: 1340 [2020-09-21 10:20:45,504 INFO L226 Difference]: Without dead ends: 778 [2020-09-21 10:20:45,505 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 [2020-09-21 10:20:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-09-21 10:20:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-09-21 10:20:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-09-21 10:20:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-09-21 10:20:45,529 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-09-21 10:20:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,529 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-09-21 10:20:45,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-09-21 10:20:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:45,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,531 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] [2020-09-21 10:20:45,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:45,531 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-09-21 10:20:45,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574715390] [2020-09-21 10:20:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574715390] [2020-09-21 10:20:45,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128590687] [2020-09-21 10:20:45,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,557 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-09-21 10:20:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,582 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-09-21 10:20:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,587 INFO L225 Difference]: With dead ends: 1164 [2020-09-21 10:20:45,588 INFO L226 Difference]: Without dead ends: 794 [2020-09-21 10:20:45,589 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 [2020-09-21 10:20:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-09-21 10:20:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-09-21 10:20:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-09-21 10:20:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-09-21 10:20:45,617 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-09-21 10:20:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,617 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-09-21 10:20:45,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-09-21 10:20:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:45,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,620 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] [2020-09-21 10:20:45,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:45,620 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-09-21 10:20:45,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412410434] [2020-09-21 10:20:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412410434] [2020-09-21 10:20:45,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947030407] [2020-09-21 10:20:45,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,651 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-09-21 10:20:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,689 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-09-21 10:20:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,697 INFO L225 Difference]: With dead ends: 1356 [2020-09-21 10:20:45,697 INFO L226 Difference]: Without dead ends: 1354 [2020-09-21 10:20:45,698 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 [2020-09-21 10:20:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-09-21 10:20:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-09-21 10:20:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-09-21 10:20:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-09-21 10:20:45,748 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-09-21 10:20:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,748 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-09-21 10:20:45,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-09-21 10:20:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:45,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,752 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] [2020-09-21 10:20:45,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:45,752 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-09-21 10:20:45,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352214151] [2020-09-21 10:20:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352214151] [2020-09-21 10:20:45,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008065338] [2020-09-21 10:20:45,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,779 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-09-21 10:20:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,833 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-09-21 10:20:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,842 INFO L225 Difference]: With dead ends: 2636 [2020-09-21 10:20:45,842 INFO L226 Difference]: Without dead ends: 1514 [2020-09-21 10:20:45,845 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 [2020-09-21 10:20:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-09-21 10:20:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-09-21 10:20:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-09-21 10:20:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-09-21 10:20:45,891 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-09-21 10:20:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,892 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-09-21 10:20:45,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-09-21 10:20:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:45,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,895 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] [2020-09-21 10:20:45,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:45,895 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-09-21 10:20:45,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567924313] [2020-09-21 10:20:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567924313] [2020-09-21 10:20:45,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631833706] [2020-09-21 10:20:45,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,920 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-09-21 10:20:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,959 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-09-21 10:20:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,967 INFO L225 Difference]: With dead ends: 2268 [2020-09-21 10:20:45,968 INFO L226 Difference]: Without dead ends: 1546 [2020-09-21 10:20:45,970 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 [2020-09-21 10:20:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-09-21 10:20:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-09-21 10:20:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-09-21 10:20:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-09-21 10:20:46,019 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-09-21 10:20:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,019 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-09-21 10:20:46,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-09-21 10:20:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:46,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:46,022 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] [2020-09-21 10:20:46,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:46,023 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-09-21 10:20:46,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:46,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425515454] [2020-09-21 10:20:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:46,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425515454] [2020-09-21 10:20:46,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:46,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:46,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756175104] [2020-09-21 10:20:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:46,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:46,049 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-09-21 10:20:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,103 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-09-21 10:20:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:46,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,116 INFO L225 Difference]: With dead ends: 2572 [2020-09-21 10:20:46,116 INFO L226 Difference]: Without dead ends: 2570 [2020-09-21 10:20:46,117 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 [2020-09-21 10:20:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-09-21 10:20:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-09-21 10:20:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-09-21 10:20:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-09-21 10:20:46,208 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-09-21 10:20:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,209 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-09-21 10:20:46,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-09-21 10:20:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:46,215 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] [2020-09-21 10:20:46,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:46,216 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-09-21 10:20:46,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:46,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514123010] [2020-09-21 10:20:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:46,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514123010] [2020-09-21 10:20:46,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:46,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:46,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85368778] [2020-09-21 10:20:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:46,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:46,249 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-09-21 10:20:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,353 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-09-21 10:20:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:46,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,372 INFO L225 Difference]: With dead ends: 5196 [2020-09-21 10:20:46,372 INFO L226 Difference]: Without dead ends: 2954 [2020-09-21 10:20:46,379 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 [2020-09-21 10:20:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-09-21 10:20:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-09-21 10:20:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-09-21 10:20:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-09-21 10:20:46,522 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-09-21 10:20:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,523 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-09-21 10:20:46,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-09-21 10:20:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:46,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:46,530 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] [2020-09-21 10:20:46,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:46,534 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-09-21 10:20:46,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:46,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993553211] [2020-09-21 10:20:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:46,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993553211] [2020-09-21 10:20:46,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:46,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:46,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047705343] [2020-09-21 10:20:46,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:46,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:46,585 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-09-21 10:20:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,655 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-09-21 10:20:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:46,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,670 INFO L225 Difference]: With dead ends: 4428 [2020-09-21 10:20:46,671 INFO L226 Difference]: Without dead ends: 3018 [2020-09-21 10:20:46,674 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 [2020-09-21 10:20:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-09-21 10:20:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-09-21 10:20:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-09-21 10:20:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-09-21 10:20:46,785 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-09-21 10:20:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,785 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-09-21 10:20:46,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-09-21 10:20:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:46,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:46,790 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] [2020-09-21 10:20:46,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:46,790 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-09-21 10:20:46,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:46,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929502739] [2020-09-21 10:20:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:46,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929502739] [2020-09-21 10:20:46,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:46,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:46,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463501837] [2020-09-21 10:20:46,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:46,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:46,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:46,820 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-09-21 10:20:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,927 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-09-21 10:20:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:46,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,944 INFO L225 Difference]: With dead ends: 8650 [2020-09-21 10:20:46,945 INFO L226 Difference]: Without dead ends: 3016 [2020-09-21 10:20:46,957 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 [2020-09-21 10:20:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-09-21 10:20:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-09-21 10:20:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-09-21 10:20:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-09-21 10:20:47,107 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-09-21 10:20:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:47,108 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-09-21 10:20:47,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-09-21 10:20:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:47,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:47,113 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] [2020-09-21 10:20:47,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:20:47,115 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-09-21 10:20:47,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:47,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212858856] [2020-09-21 10:20:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:47,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:47,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212858856] [2020-09-21 10:20:47,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:47,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:47,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085466768] [2020-09-21 10:20:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:47,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:47,146 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-09-21 10:20:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:47,191 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-09-21 10:20:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:47,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:47,192 INFO L225 Difference]: With dead ends: 3016 [2020-09-21 10:20:47,192 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:20:47,196 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 [2020-09-21 10:20:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:20:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:20:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:20:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:20:47,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-09-21 10:20:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:47,198 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:20:47,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:20:47,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:20:47,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:20:47,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:20:47,226 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:20:47,226 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:47,226 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:47,226 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:20:47,226 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-09-21 10:20:47,227 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,228 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,228 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-09-21 10:20:47,228 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-09-21 10:20:47,228 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-09-21 10:20:47,228 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-09-21 10:20:47,228 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-09-21 10:20:47,229 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,230 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,231 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-09-21 10:20:47,231 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-09-21 10:20:47,231 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-09-21 10:20:47,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:47 BoogieIcfgContainer [2020-09-21 10:20:47,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:47,249 INFO L168 Benchmark]: Toolchain (without parser) took 4606.96 ms. Allocated memory was 136.8 MB in the beginning and 314.6 MB in the end (delta: 177.7 MB). Free memory was 99.9 MB in the beginning and 236.0 MB in the end (delta: -136.0 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,250 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.71 ms. Allocated memory is still 136.8 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,251 INFO L168 Benchmark]: Boogie Preprocessor took 118.70 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 88.9 MB in the beginning and 177.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,251 INFO L168 Benchmark]: RCFGBuilder took 492.81 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 159.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,252 INFO L168 Benchmark]: TraceAbstraction took 3623.66 ms. Allocated memory was 199.8 MB in the beginning and 314.6 MB in the end (delta: 114.8 MB). Free memory was 158.8 MB in the beginning and 236.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:47,255 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.71 ms. Allocated memory is still 136.8 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.70 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 88.9 MB in the beginning and 177.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.81 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 159.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3623.66 ms. Allocated memory was 199.8 MB in the beginning and 314.6 MB in the end (delta: 114.8 MB). Free memory was 158.8 MB in the beginning and 236.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...