/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:38:43,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:38:43,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:38:43,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:38:43,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:38:43,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:38:43,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:38:43,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:38:43,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:38:43,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:38:43,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:38:43,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:38:43,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:38:43,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:38:43,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:38:43,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:38:43,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:38:43,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:38:43,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:38:43,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:38:43,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:38:43,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:38:43,172 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:38:43,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:38:43,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:38:43,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:38:43,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:38:43,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:38:43,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:38:43,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:38:43,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:38:43,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:38:43,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:38:43,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:38:43,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:38:43,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:38:43,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:38:43,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:38:43,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:38:43,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:43,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:38:43,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:38:43,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:38:43,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:38:43,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:38:43,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:38:43,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:38:43,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:38:43,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:38:43,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:38:43,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:38:43,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:38:43,518 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:38:43,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 16:38:43,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15de38c62/d37ae37f69d143669e58d029d9336881/FLAGb7344b67d [2020-08-22 16:38:44,140 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:38:44,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 16:38:44,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15de38c62/d37ae37f69d143669e58d029d9336881/FLAGb7344b67d [2020-08-22 16:38:44,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15de38c62/d37ae37f69d143669e58d029d9336881 [2020-08-22 16:38:44,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:38:44,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:38:44,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:44,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:38:44,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:38:44,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30914678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44, skipping insertion in model container [2020-08-22 16:38:44,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:38:44,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:38:44,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:44,707 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:38:44,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:44,787 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:38:44,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44 WrapperNode [2020-08-22 16:38:44,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:44,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:38:44,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:38:44,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:38:44,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... [2020-08-22 16:38:44,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:38:44,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:38:44,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:38:44,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:38:44,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:44,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:38:44,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:38:44,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:38:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:38:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:38:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:38:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:38:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:38:45,374 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:38:45,374 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:38:45,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:45 BoogieIcfgContainer [2020-08-22 16:38:45,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:38:45,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:38:45,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:38:45,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:38:45,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:44" (1/3) ... [2020-08-22 16:38:45,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcf8fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:45, skipping insertion in model container [2020-08-22 16:38:45,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:44" (2/3) ... [2020-08-22 16:38:45,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcf8fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:45, skipping insertion in model container [2020-08-22 16:38:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:45" (3/3) ... [2020-08-22 16:38:45,388 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 16:38:45,400 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:38:45,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:38:45,426 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:38:45,452 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:38:45,452 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:38:45,453 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:38:45,453 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:38:45,453 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:38:45,454 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:38:45,454 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:38:45,454 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:38:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 16:38:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:38:45,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:45,481 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-22 16:38:45,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582320896] [2020-08-22 16:38:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582320896] [2020-08-22 16:38:45,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524415961] [2020-08-22 16:38:45,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:45,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:45,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,754 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 16:38:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:45,827 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-22 16:38:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:45,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:38:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:45,842 INFO L225 Difference]: With dead ends: 93 [2020-08-22 16:38:45,843 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 16:38:45,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 16:38:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-22 16:38:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:38:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-22 16:38:45,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-22 16:38:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:45,891 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-22 16:38:45,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-22 16:38:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:38:45,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:45,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:45,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:38:45,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:45,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-22 16:38:45,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:45,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819804432] [2020-08-22 16:38:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:45,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819804432] [2020-08-22 16:38:45,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:45,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:45,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287255513] [2020-08-22 16:38:46,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,002 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-22 16:38:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,033 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-22 16:38:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:38:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,036 INFO L225 Difference]: With dead ends: 127 [2020-08-22 16:38:46,036 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 16:38:46,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 16:38:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 16:38:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 16:38:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-22 16:38:46,055 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-22 16:38:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,056 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-22 16:38:46,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-22 16:38:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:46,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:38:46,058 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-22 16:38:46,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138973573] [2020-08-22 16:38:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138973573] [2020-08-22 16:38:46,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780903035] [2020-08-22 16:38:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,118 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-22 16:38:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,145 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-22 16:38:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,147 INFO L225 Difference]: With dead ends: 117 [2020-08-22 16:38:46,148 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 16:38:46,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 16:38:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-22 16:38:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 16:38:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-22 16:38:46,161 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-22 16:38:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,162 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-22 16:38:46,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-22 16:38:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:46,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:38:46,164 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-22 16:38:46,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108046386] [2020-08-22 16:38:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108046386] [2020-08-22 16:38:46,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078354532] [2020-08-22 16:38:46,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,214 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-22 16:38:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,240 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-22 16:38:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,243 INFO L225 Difference]: With dead ends: 148 [2020-08-22 16:38:46,244 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 16:38:46,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 16:38:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-22 16:38:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 16:38:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-22 16:38:46,258 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-22 16:38:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,258 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-22 16:38:46,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-22 16:38:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:38:46,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:38:46,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-22 16:38:46,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588760931] [2020-08-22 16:38:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588760931] [2020-08-22 16:38:46,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944769490] [2020-08-22 16:38:46,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,313 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-22 16:38:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,338 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-22 16:38:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:38:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,341 INFO L225 Difference]: With dead ends: 244 [2020-08-22 16:38:46,341 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 16:38:46,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 16:38:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-22 16:38:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-22 16:38:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-22 16:38:46,357 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-22 16:38:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,358 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-22 16:38:46,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-22 16:38:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:46,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:38:46,360 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-22 16:38:46,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452245695] [2020-08-22 16:38:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452245695] [2020-08-22 16:38:46,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138633168] [2020-08-22 16:38:46,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,416 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-22 16:38:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,441 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-22 16:38:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,444 INFO L225 Difference]: With dead ends: 219 [2020-08-22 16:38:46,444 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 16:38:46,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 16:38:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-22 16:38:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 16:38:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-22 16:38:46,459 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-22 16:38:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,459 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-22 16:38:46,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-22 16:38:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:46,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:38:46,462 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-22 16:38:46,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856191798] [2020-08-22 16:38:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856191798] [2020-08-22 16:38:46,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965231330] [2020-08-22 16:38:46,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,521 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-22 16:38:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,541 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-22 16:38:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,544 INFO L225 Difference]: With dead ends: 276 [2020-08-22 16:38:46,544 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 16:38:46,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 16:38:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-22 16:38:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 16:38:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-22 16:38:46,560 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-22 16:38:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,560 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-22 16:38:46,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-22 16:38:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:38:46,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:38:46,563 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-22 16:38:46,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449945968] [2020-08-22 16:38:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449945968] [2020-08-22 16:38:46,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786054871] [2020-08-22 16:38:46,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,606 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-22 16:38:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,631 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-22 16:38:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:38:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,634 INFO L225 Difference]: With dead ends: 472 [2020-08-22 16:38:46,634 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 16:38:46,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 16:38:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-22 16:38:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 16:38:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-22 16:38:46,653 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-22 16:38:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,653 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-22 16:38:46,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-22 16:38:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:46,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:38:46,656 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-22 16:38:46,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887200598] [2020-08-22 16:38:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887200598] [2020-08-22 16:38:46,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865902940] [2020-08-22 16:38:46,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,725 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-22 16:38:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,755 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-22 16:38:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,758 INFO L225 Difference]: With dead ends: 420 [2020-08-22 16:38:46,759 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 16:38:46,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 16:38:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-22 16:38:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-22 16:38:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-22 16:38:46,777 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-22 16:38:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,777 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-22 16:38:46,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-22 16:38:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:46,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 16:38:46,791 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-22 16:38:46,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395859120] [2020-08-22 16:38:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395859120] [2020-08-22 16:38:46,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424132070] [2020-08-22 16:38:46,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,824 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-22 16:38:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,853 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-22 16:38:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,860 INFO L225 Difference]: With dead ends: 524 [2020-08-22 16:38:46,860 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 16:38:46,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 16:38:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-22 16:38:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 16:38:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-22 16:38:46,877 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-22 16:38:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,877 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-22 16:38:46,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-22 16:38:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:38:46,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 16:38:46,880 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,880 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-22 16:38:46,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900635314] [2020-08-22 16:38:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:46,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900635314] [2020-08-22 16:38:46,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:46,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:46,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215362297] [2020-08-22 16:38:46,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:46,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:46,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,914 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-22 16:38:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:46,951 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-22 16:38:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:46,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:38:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:46,956 INFO L225 Difference]: With dead ends: 924 [2020-08-22 16:38:46,956 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 16:38:46,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 16:38:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-22 16:38:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-22 16:38:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-22 16:38:46,989 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-22 16:38:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:46,989 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-22 16:38:46,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-22 16:38:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:46,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:46,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:46,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 16:38:46,992 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-22 16:38:46,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:46,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574991321] [2020-08-22 16:38:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574991321] [2020-08-22 16:38:47,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961990893] [2020-08-22 16:38:47,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,021 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-22 16:38:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,044 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-22 16:38:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,048 INFO L225 Difference]: With dead ends: 816 [2020-08-22 16:38:47,048 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 16:38:47,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 16:38:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-22 16:38:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 16:38:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-22 16:38:47,067 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-22 16:38:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,068 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-22 16:38:47,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-22 16:38:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:47,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 16:38:47,070 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-22 16:38:47,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303248821] [2020-08-22 16:38:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303248821] [2020-08-22 16:38:47,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830038074] [2020-08-22 16:38:47,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,098 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-22 16:38:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,123 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-22 16:38:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,129 INFO L225 Difference]: With dead ends: 1004 [2020-08-22 16:38:47,130 INFO L226 Difference]: Without dead ends: 1002 [2020-08-22 16:38:47,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-22 16:38:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-22 16:38:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 16:38:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-22 16:38:47,159 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-22 16:38:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,159 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-22 16:38:47,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-22 16:38:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:38:47,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 16:38:47,162 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-22 16:38:47,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469281284] [2020-08-22 16:38:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469281284] [2020-08-22 16:38:47,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232094387] [2020-08-22 16:38:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,193 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-22 16:38:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,230 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-22 16:38:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:38:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,237 INFO L225 Difference]: With dead ends: 1820 [2020-08-22 16:38:47,238 INFO L226 Difference]: Without dead ends: 1066 [2020-08-22 16:38:47,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-22 16:38:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-22 16:38:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-22 16:38:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-22 16:38:47,289 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-22 16:38:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,290 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-22 16:38:47,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-22 16:38:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:47,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 16:38:47,294 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-22 16:38:47,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251665217] [2020-08-22 16:38:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251665217] [2020-08-22 16:38:47,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640115461] [2020-08-22 16:38:47,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,352 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-22 16:38:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,387 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-22 16:38:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,394 INFO L225 Difference]: With dead ends: 1596 [2020-08-22 16:38:47,395 INFO L226 Difference]: Without dead ends: 1082 [2020-08-22 16:38:47,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-22 16:38:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-22 16:38:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-22 16:38:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-22 16:38:47,431 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-22 16:38:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,432 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-22 16:38:47,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-22 16:38:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 16:38:47,435 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-22 16:38:47,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552938708] [2020-08-22 16:38:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552938708] [2020-08-22 16:38:47,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479225635] [2020-08-22 16:38:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,460 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-22 16:38:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,498 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-22 16:38:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,510 INFO L225 Difference]: With dead ends: 1932 [2020-08-22 16:38:47,510 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 16:38:47,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 16:38:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-22 16:38:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 16:38:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-22 16:38:47,564 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-22 16:38:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,564 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-22 16:38:47,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-22 16:38:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:38:47,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 16:38:47,570 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-22 16:38:47,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904360794] [2020-08-22 16:38:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904360794] [2020-08-22 16:38:47,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810016067] [2020-08-22 16:38:47,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,600 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-22 16:38:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,655 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-22 16:38:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:38:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,667 INFO L225 Difference]: With dead ends: 3596 [2020-08-22 16:38:47,667 INFO L226 Difference]: Without dead ends: 2090 [2020-08-22 16:38:47,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-22 16:38:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-22 16:38:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-22 16:38:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-22 16:38:47,755 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-22 16:38:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,756 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-22 16:38:47,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-22 16:38:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 16:38:47,762 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-22 16:38:47,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800269273] [2020-08-22 16:38:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:47,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800269273] [2020-08-22 16:38:47,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:47,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:47,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133680625] [2020-08-22 16:38:47,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:47,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,804 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-22 16:38:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:47,877 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-22 16:38:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:47,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:47,891 INFO L225 Difference]: With dead ends: 3132 [2020-08-22 16:38:47,891 INFO L226 Difference]: Without dead ends: 2122 [2020-08-22 16:38:47,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-22 16:38:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-22 16:38:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-22 16:38:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-22 16:38:47,990 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-22 16:38:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:47,990 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-22 16:38:47,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-22 16:38:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:47,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:47,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:47,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 16:38:47,996 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-22 16:38:47,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:47,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401722748] [2020-08-22 16:38:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:48,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401722748] [2020-08-22 16:38:48,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:48,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:48,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945729943] [2020-08-22 16:38:48,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:48,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,039 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-22 16:38:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:48,125 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-22 16:38:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:48,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:48,148 INFO L225 Difference]: With dead ends: 3724 [2020-08-22 16:38:48,148 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 16:38:48,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 16:38:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-22 16:38:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-22 16:38:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-22 16:38:48,253 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-22 16:38:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:48,254 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-22 16:38:48,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-22 16:38:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:38:48,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:48,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:48,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 16:38:48,260 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-22 16:38:48,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:48,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556461478] [2020-08-22 16:38:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:48,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556461478] [2020-08-22 16:38:48,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:48,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:48,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301841013] [2020-08-22 16:38:48,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:48,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,294 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-22 16:38:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:48,378 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-22 16:38:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:48,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:38:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:48,399 INFO L225 Difference]: With dead ends: 7116 [2020-08-22 16:38:48,400 INFO L226 Difference]: Without dead ends: 4106 [2020-08-22 16:38:48,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-22 16:38:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-22 16:38:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-22 16:38:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-22 16:38:48,533 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-22 16:38:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:48,534 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-22 16:38:48,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-22 16:38:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:38:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:48,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:48,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 16:38:48,541 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-22 16:38:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:48,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151899407] [2020-08-22 16:38:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:48,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151899407] [2020-08-22 16:38:48,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:48,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:48,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351308000] [2020-08-22 16:38:48,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:48,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:48,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:48,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,565 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-22 16:38:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:48,665 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-22 16:38:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:48,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 16:38:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:48,706 INFO L225 Difference]: With dead ends: 6156 [2020-08-22 16:38:48,714 INFO L226 Difference]: Without dead ends: 4170 [2020-08-22 16:38:48,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-22 16:38:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-22 16:38:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-22 16:38:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-22 16:38:48,864 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-22 16:38:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:48,864 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-22 16:38:48,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-22 16:38:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:38:48,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:48,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:48,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 16:38:48,871 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-22 16:38:48,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:48,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910144824] [2020-08-22 16:38:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:48,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910144824] [2020-08-22 16:38:48,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:48,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:48,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821217554] [2020-08-22 16:38:48,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:48,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:48,910 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-22 16:38:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:49,030 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-22 16:38:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:49,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 16:38:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:49,051 INFO L225 Difference]: With dead ends: 12108 [2020-08-22 16:38:49,051 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 16:38:49,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 16:38:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-22 16:38:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 16:38:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-22 16:38:49,323 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-22 16:38:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:49,324 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-22 16:38:49,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-22 16:38:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:38:49,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:49,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:49,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 16:38:49,389 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:49,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-22 16:38:49,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:49,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352816652] [2020-08-22 16:38:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:49,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352816652] [2020-08-22 16:38:49,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:49,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:49,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612009836] [2020-08-22 16:38:49,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:49,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,422 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-22 16:38:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:49,549 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-22 16:38:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:49,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 16:38:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:49,573 INFO L225 Difference]: With dead ends: 9100 [2020-08-22 16:38:49,574 INFO L226 Difference]: Without dead ends: 9098 [2020-08-22 16:38:49,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-22 16:38:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-22 16:38:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 16:38:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-22 16:38:49,804 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-22 16:38:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:49,805 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-22 16:38:49,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-22 16:38:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:38:49,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:49,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:49,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 16:38:49,818 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-22 16:38:49,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:49,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565021509] [2020-08-22 16:38:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:49,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565021509] [2020-08-22 16:38:49,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:49,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:49,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505790316] [2020-08-22 16:38:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:49,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:49,851 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-22 16:38:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:50,068 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-22 16:38:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:50,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 16:38:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:50,110 INFO L225 Difference]: With dead ends: 13708 [2020-08-22 16:38:50,110 INFO L226 Difference]: Without dead ends: 13706 [2020-08-22 16:38:50,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-22 16:38:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-22 16:38:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-22 16:38:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-22 16:38:50,448 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-22 16:38:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:50,449 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-22 16:38:50,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-22 16:38:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:38:50,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:50,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:50,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 16:38:50,471 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-22 16:38:50,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:50,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270659250] [2020-08-22 16:38:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:50,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270659250] [2020-08-22 16:38:50,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:50,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:50,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786414088] [2020-08-22 16:38:50,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:50,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:50,506 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-22 16:38:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:50,759 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-22 16:38:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:50,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 16:38:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:50,800 INFO L225 Difference]: With dead ends: 27788 [2020-08-22 16:38:50,800 INFO L226 Difference]: Without dead ends: 15754 [2020-08-22 16:38:50,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-22 16:38:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-22 16:38:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-22 16:38:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-22 16:38:51,379 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-22 16:38:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:51,379 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-22 16:38:51,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-22 16:38:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:38:51,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:51,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:51,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 16:38:51,402 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-22 16:38:51,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:51,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270150186] [2020-08-22 16:38:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:51,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:51,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270150186] [2020-08-22 16:38:51,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:51,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:51,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523081144] [2020-08-22 16:38:51,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:51,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:51,446 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-22 16:38:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:51,814 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-22 16:38:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:51,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 16:38:51,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:51,848 INFO L225 Difference]: With dead ends: 23820 [2020-08-22 16:38:51,849 INFO L226 Difference]: Without dead ends: 16138 [2020-08-22 16:38:51,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-22 16:38:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-22 16:38:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-22 16:38:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-22 16:38:52,172 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-22 16:38:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,172 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-22 16:38:52,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-22 16:38:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:38:52,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 16:38:52,195 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-22 16:38:52,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168960822] [2020-08-22 16:38:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168960822] [2020-08-22 16:38:52,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615501799] [2020-08-22 16:38:52,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,229 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-22 16:38:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,517 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-22 16:38:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 16:38:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,582 INFO L225 Difference]: With dead ends: 26636 [2020-08-22 16:38:52,583 INFO L226 Difference]: Without dead ends: 26634 [2020-08-22 16:38:52,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-22 16:38:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-22 16:38:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-22 16:38:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-22 16:38:53,687 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-22 16:38:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:53,687 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-22 16:38:53,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-22 16:38:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:38:53,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:53,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:53,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 16:38:53,729 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-22 16:38:53,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:53,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821170951] [2020-08-22 16:38:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:53,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821170951] [2020-08-22 16:38:53,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:53,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:53,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152388593] [2020-08-22 16:38:53,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:53,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,756 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-22 16:38:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:54,375 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-22 16:38:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:54,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 16:38:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:54,466 INFO L225 Difference]: With dead ends: 55308 [2020-08-22 16:38:54,467 INFO L226 Difference]: Without dead ends: 31242 [2020-08-22 16:38:54,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-22 16:38:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-22 16:38:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-22 16:38:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-22 16:38:55,235 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-22 16:38:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:55,236 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-22 16:38:55,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-22 16:38:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:38:55,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:55,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:55,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 16:38:55,284 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-22 16:38:55,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:55,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103105886] [2020-08-22 16:38:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:55,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103105886] [2020-08-22 16:38:55,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:55,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:55,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054593123] [2020-08-22 16:38:55,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:55,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:55,332 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-22 16:38:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:55,873 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-22 16:38:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:55,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 16:38:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:55,955 INFO L225 Difference]: With dead ends: 46860 [2020-08-22 16:38:55,955 INFO L226 Difference]: Without dead ends: 31754 [2020-08-22 16:38:55,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-22 16:38:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-22 16:38:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-22 16:38:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-22 16:38:56,595 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-22 16:38:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:56,595 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-22 16:38:56,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-22 16:38:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:38:56,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:56,620 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:56,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 16:38:56,621 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-22 16:38:56,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:56,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024307019] [2020-08-22 16:38:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:56,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:56,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024307019] [2020-08-22 16:38:56,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:56,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:56,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379975020] [2020-08-22 16:38:56,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:56,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:56,648 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-22 16:38:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:57,990 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-22 16:38:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:57,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 16:38:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:58,123 INFO L225 Difference]: With dead ends: 51210 [2020-08-22 16:38:58,124 INFO L226 Difference]: Without dead ends: 51208 [2020-08-22 16:38:58,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-22 16:38:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-22 16:38:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-22 16:38:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-22 16:38:59,299 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-22 16:38:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:59,300 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-22 16:38:59,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-22 16:38:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:38:59,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:59,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:59,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 16:38:59,353 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-22 16:38:59,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:59,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212189539] [2020-08-22 16:38:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:59,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212189539] [2020-08-22 16:38:59,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:59,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:59,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788790428] [2020-08-22 16:38:59,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:59,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:59,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:59,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:59,388 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-22 16:39:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,193 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-22 16:39:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 16:39:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,194 INFO L225 Difference]: With dead ends: 109576 [2020-08-22 16:39:00,194 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:39:00,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:39:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:39:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:39:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:39:00,298 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-22 16:39:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,298 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:39:00,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:39:00,298 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:39:00,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 16:39:00,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:39:00,334 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:39:00,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:39:00,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:39:00,335 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:39:00,335 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:39:00,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:39:00,335 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-22 16:39:00,335 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,336 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-22 16:39:00,337 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,338 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,339 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-22 16:39:00,340 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-22 16:39:00,341 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,342 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 16:39:00,342 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-22 16:39:00,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:00 BoogieIcfgContainer [2020-08-22 16:39:00,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:39:00,365 INFO L168 Benchmark]: Toolchain (without parser) took 15887.48 ms. Allocated memory was 138.4 MB in the beginning and 972.6 MB in the end (delta: 834.1 MB). Free memory was 102.0 MB in the beginning and 350.1 MB in the end (delta: -248.1 MB). Peak memory consumption was 586.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,369 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.91 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 90.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,370 INFO L168 Benchmark]: Boogie Preprocessor took 130.90 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 178.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,371 INFO L168 Benchmark]: RCFGBuilder took 459.27 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 157.5 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,371 INFO L168 Benchmark]: TraceAbstraction took 14981.55 ms. Allocated memory was 200.8 MB in the beginning and 972.6 MB in the end (delta: 771.8 MB). Free memory was 157.5 MB in the beginning and 350.1 MB in the end (delta: -192.6 MB). Peak memory consumption was 579.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:00,375 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.91 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 90.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.90 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 178.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.27 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 157.5 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14981.55 ms. Allocated memory was 200.8 MB in the beginning and 972.6 MB in the end (delta: 771.8 MB). Free memory was 157.5 MB in the beginning and 350.1 MB in the end (delta: -192.6 MB). Peak memory consumption was 579.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.8s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...