/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:02:42,013 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 17:02:42,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:02:42,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:02:42,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:02:42,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:02:42,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:02:42,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:02:42,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:02:42,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:02:42,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:02:42,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:02:42,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:02:42,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:02:42,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:02:42,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:02:42,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:02:42,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:02:42,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:02:42,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:02:42,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:02:42,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:02:42,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:02:42,155 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:02:42,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:02:42,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:02:42,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:02:42,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:02:42,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:02:42,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:02:42,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:02:42,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:02:42,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:02:42,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:02:42,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:02:42,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:02:42,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:02:42,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:02:42,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:02:42,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:02:42,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:02:42,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:02:42,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:02:42,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:02:42,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:02:42,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:02:42,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:02:42,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:02:42,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:02:42,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:02:42,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:02:42,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:02:42,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:02:42,490 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:02:42,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-18 17:02:42,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c141e4a8/9ca00e49da3b46098388ce7d45a1f1a6/FLAGc99d2ea8f [2020-08-18 17:02:43,039 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:02:43,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-18 17:02:43,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c141e4a8/9ca00e49da3b46098388ce7d45a1f1a6/FLAGc99d2ea8f [2020-08-18 17:02:43,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c141e4a8/9ca00e49da3b46098388ce7d45a1f1a6 [2020-08-18 17:02:43,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:02:43,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:02:43,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:43,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:02:43,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:02:43,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e72776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43, skipping insertion in model container [2020-08-18 17:02:43,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:02:43,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:02:43,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:43,617 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:02:43,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:43,647 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:02:43,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43 WrapperNode [2020-08-18 17:02:43,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:43,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:02:43,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:02:43,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:02:43,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... [2020-08-18 17:02:43,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:02:43,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:02:43,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:02:43,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:02:43,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:02:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:02:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:02:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-18 17:02:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:02:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:02:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:02:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-18 17:02:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:02:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:02:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:02:43,993 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:02:43,994 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:02:43,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:43 BoogieIcfgContainer [2020-08-18 17:02:43,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:02:43,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:02:43,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:02:44,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:02:44,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:02:43" (1/3) ... [2020-08-18 17:02:44,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4e070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:44, skipping insertion in model container [2020-08-18 17:02:44,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:43" (2/3) ... [2020-08-18 17:02:44,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4e070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:44, skipping insertion in model container [2020-08-18 17:02:44,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:43" (3/3) ... [2020-08-18 17:02:44,007 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-18 17:02:44,025 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:02:44,039 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:02:44,054 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:02:44,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:02:44,085 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:02:44,086 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:02:44,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:02:44,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:02:44,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:02:44,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:02:44,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:02:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-18 17:02:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:02:44,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:44,122 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:44,123 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:44,132 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-18 17:02:44,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:44,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747142542] [2020-08-18 17:02:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 17:02:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:02:44,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747142542] [2020-08-18 17:02:44,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:44,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:02:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431882934] [2020-08-18 17:02:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:02:44,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:44,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:02:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:02:44,460 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-18 17:02:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:44,597 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-18 17:02:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:02:44,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-18 17:02:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:44,611 INFO L225 Difference]: With dead ends: 41 [2020-08-18 17:02:44,611 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 17:02:44,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 17:02:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 17:02:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 17:02:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-18 17:02:44,663 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-18 17:02:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:44,663 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-18 17:02:44,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:02:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-18 17:02:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:02:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:44,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:44,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:02:44,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-18 17:02:44,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:44,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437186365] [2020-08-18 17:02:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 17:02:44,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437186365] [2020-08-18 17:02:44,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:44,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:02:44,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843705537] [2020-08-18 17:02:44,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:02:44,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:02:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:02:44,788 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-18 17:02:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:44,865 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-18 17:02:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:02:44,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 17:02:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:44,868 INFO L225 Difference]: With dead ends: 29 [2020-08-18 17:02:44,868 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 17:02:44,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 17:02:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 17:02:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 17:02:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-18 17:02:44,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-18 17:02:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:44,878 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-18 17:02:44,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:02:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-18 17:02:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:02:44,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:44,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:44,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:02:44,881 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-18 17:02:44,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:44,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52195205] [2020-08-18 17:02:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 17:02:45,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52195205] [2020-08-18 17:02:45,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:45,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:02:45,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415921829] [2020-08-18 17:02:45,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:02:45,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:02:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:02:45,447 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-18 17:02:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:45,892 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-18 17:02:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:02:45,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-18 17:02:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:45,894 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:02:45,894 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 17:02:45,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:02:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 17:02:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-18 17:02:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 17:02:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-18 17:02:45,912 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-18 17:02:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:45,912 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-18 17:02:45,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:02:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-18 17:02:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 17:02:45,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:45,917 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:45,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:02:45,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-18 17:02:45,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:45,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029139656] [2020-08-18 17:02:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:45,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:02:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 17:02:46,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029139656] [2020-08-18 17:02:46,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:46,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:02:46,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449216339] [2020-08-18 17:02:46,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:02:46,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:02:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:46,071 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-18 17:02:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:46,141 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-18 17:02:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:02:46,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-18 17:02:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:46,143 INFO L225 Difference]: With dead ends: 54 [2020-08-18 17:02:46,144 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 17:02:46,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:02:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 17:02:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 17:02:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 17:02:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-18 17:02:46,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-18 17:02:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:46,154 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-18 17:02:46,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:02:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-18 17:02:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 17:02:46,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:46,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:46,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:02:46,156 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-18 17:02:46,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:46,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119635432] [2020-08-18 17:02:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 17:02:46,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119635432] [2020-08-18 17:02:46,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:46,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:02:46,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972251171] [2020-08-18 17:02:46,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:02:46,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:02:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:02:46,720 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-18 17:02:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:47,164 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-18 17:02:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:02:47,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-18 17:02:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:47,166 INFO L225 Difference]: With dead ends: 39 [2020-08-18 17:02:47,166 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 17:02:47,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:02:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 17:02:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-18 17:02:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 17:02:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-18 17:02:47,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-18 17:02:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:47,176 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-18 17:02:47,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:02:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-18 17:02:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:02:47,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:47,178 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:47,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:02:47,179 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-18 17:02:47,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:47,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360208462] [2020-08-18 17:02:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-18 17:02:47,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360208462] [2020-08-18 17:02:47,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:47,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:02:47,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641621470] [2020-08-18 17:02:47,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:02:47,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:02:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:02:47,661 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-18 17:02:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:48,327 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 17:02:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:02:48,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-18 17:02:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:48,330 INFO L225 Difference]: With dead ends: 42 [2020-08-18 17:02:48,331 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 17:02:48,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:02:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 17:02:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 17:02:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 17:02:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-18 17:02:48,348 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-18 17:02:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:48,349 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-18 17:02:48,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:02:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-18 17:02:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:02:48,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:48,350 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:48,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:02:48,351 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-18 17:02:48,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:48,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519083229] [2020-08-18 17:02:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-18 17:02:48,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519083229] [2020-08-18 17:02:48,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:48,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 17:02:48,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445007851] [2020-08-18 17:02:48,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 17:02:48,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 17:02:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:02:48,947 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-18 17:02:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:49,726 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 17:02:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:02:49,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-18 17:02:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:49,729 INFO L225 Difference]: With dead ends: 45 [2020-08-18 17:02:49,729 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 17:02:49,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 17:02:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 17:02:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-18 17:02:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:02:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-18 17:02:49,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-18 17:02:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:49,741 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-18 17:02:49,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 17:02:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-18 17:02:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 17:02:49,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:49,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:49,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:02:49,743 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-18 17:02:49,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:49,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091708478] [2020-08-18 17:02:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:49,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:49,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:49,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:49,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:49,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:02:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 17:02:50,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091708478] [2020-08-18 17:02:50,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:50,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:02:50,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028222785] [2020-08-18 17:02:50,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:02:50,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:02:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:02:50,066 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-18 17:02:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:50,628 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-18 17:02:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:02:50,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 17:02:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:50,630 INFO L225 Difference]: With dead ends: 47 [2020-08-18 17:02:50,630 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 17:02:50,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:02:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 17:02:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 17:02:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:02:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-18 17:02:50,645 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-18 17:02:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:50,646 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-18 17:02:50,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:02:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-18 17:02:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:02:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:50,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:50,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:02:50,648 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-18 17:02:50,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:50,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841001962] [2020-08-18 17:02:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:02:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-18 17:02:50,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841001962] [2020-08-18 17:02:50,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:50,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:02:50,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625369723] [2020-08-18 17:02:50,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:02:50,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:02:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:02:50,966 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-18 17:02:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:51,312 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-18 17:02:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:02:51,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-18 17:02:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:51,314 INFO L225 Difference]: With dead ends: 47 [2020-08-18 17:02:51,314 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 17:02:51,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:02:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 17:02:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 17:02:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:02:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-18 17:02:51,332 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-18 17:02:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:51,332 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-18 17:02:51,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:02:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-18 17:02:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:02:51,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:51,335 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:51,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:02:51,336 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:51,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-18 17:02:51,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:51,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281184453] [2020-08-18 17:02:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:02:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-18 17:02:51,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281184453] [2020-08-18 17:02:51,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:51,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 17:02:51,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510464547] [2020-08-18 17:02:51,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 17:02:51,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 17:02:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:02:51,895 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-18 17:02:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:52,511 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-18 17:02:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:02:52,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-18 17:02:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:52,514 INFO L225 Difference]: With dead ends: 47 [2020-08-18 17:02:52,514 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 17:02:52,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-18 17:02:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 17:02:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 17:02:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:02:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-18 17:02:52,527 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-18 17:02:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:52,528 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-18 17:02:52,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 17:02:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-18 17:02:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 17:02:52,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:52,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:52,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:02:52,529 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-18 17:02:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:52,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046789038] [2020-08-18 17:02:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:02:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:53,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:53,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-18 17:02:53,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046789038] [2020-08-18 17:02:53,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:53,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 17:02:53,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512264725] [2020-08-18 17:02:53,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 17:02:53,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 17:02:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:02:53,212 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-18 17:02:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:54,100 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-18 17:02:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:02:54,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-18 17:02:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:54,103 INFO L225 Difference]: With dead ends: 47 [2020-08-18 17:02:54,104 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 17:02:54,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:02:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 17:02:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-18 17:02:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:02:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-18 17:02:54,113 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-18 17:02:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:54,114 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-18 17:02:54,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 17:02:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-18 17:02:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 17:02:54,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:54,115 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:54,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:02:54,116 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:54,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-18 17:02:54,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:54,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378932424] [2020-08-18 17:02:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:02:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-18 17:02:54,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378932424] [2020-08-18 17:02:54,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:54,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 17:02:54,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513570063] [2020-08-18 17:02:54,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 17:02:54,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 17:02:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:02:54,785 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-18 17:02:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:55,734 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-18 17:02:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:02:55,734 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-18 17:02:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:55,736 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:02:55,736 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:02:55,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 17:02:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:02:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 17:02:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:02:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 17:02:55,747 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-18 17:02:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:55,748 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 17:02:55,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 17:02:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 17:02:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 17:02:55,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:55,749 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:55,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:02:55,750 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-18 17:02:55,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:55,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239389353] [2020-08-18 17:02:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:55,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:55,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:55,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:02:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 17:02:56,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239389353] [2020-08-18 17:02:56,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:56,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 17:02:56,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016592722] [2020-08-18 17:02:56,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 17:02:56,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 17:02:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:02:56,533 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-18 17:02:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:57,615 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-18 17:02:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:02:57,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 17:02:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:57,617 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:02:57,618 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:02:57,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 17:02:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:02:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 17:02:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 17:02:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-18 17:02:57,639 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-18 17:02:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:57,640 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-18 17:02:57,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 17:02:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-18 17:02:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 17:02:57,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:57,642 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:57,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:02:57,642 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-18 17:02:57,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:57,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164844887] [2020-08-18 17:02:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:02:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:58,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 17:02:58,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164844887] [2020-08-18 17:02:58,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:58,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 17:02:58,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292634618] [2020-08-18 17:02:58,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 17:02:58,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 17:02:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:02:58,332 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-18 17:02:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:59,369 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-18 17:02:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:02:59,369 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 17:02:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:59,371 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:02:59,371 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:02:59,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 17:02:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:02:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 17:02:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:02:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 17:02:59,380 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-18 17:02:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:59,380 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 17:02:59,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 17:02:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 17:02:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:02:59,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:59,382 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:59,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:02:59,382 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-18 17:02:59,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:59,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655161981] [2020-08-18 17:02:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:02:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:02:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:02:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-18 17:02:59,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655161981] [2020-08-18 17:02:59,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:02:59,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 17:02:59,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219176399] [2020-08-18 17:02:59,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 17:02:59,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 17:02:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:02:59,915 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-18 17:03:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:00,672 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-18 17:03:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:03:00,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-18 17:03:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:00,674 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:03:00,674 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:03:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-18 17:03:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:03:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 17:03:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:03:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-18 17:03:00,682 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-18 17:03:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:00,683 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-18 17:03:00,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 17:03:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-18 17:03:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 17:03:00,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:00,684 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:00,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:03:00,684 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-18 17:03:00,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:00,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998674062] [2020-08-18 17:03:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:00,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:00,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:00,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:00,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:03:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 17:03:01,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998674062] [2020-08-18 17:03:01,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:01,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:03:01,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500523288] [2020-08-18 17:03:01,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:03:01,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:03:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:03:01,095 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-18 17:03:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:01,587 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-18 17:03:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:03:01,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-18 17:03:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:01,589 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:03:01,589 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:03:01,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:03:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:03:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 17:03:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:03:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-18 17:03:01,598 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-18 17:03:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:01,598 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-18 17:03:01,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:03:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-18 17:03:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:03:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:01,601 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:01,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:03:01,601 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 15 times [2020-08-18 17:03:01,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:01,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095476876] [2020-08-18 17:03:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:03:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-18 17:03:02,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095476876] [2020-08-18 17:03:02,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:02,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 17:03:02,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067121794] [2020-08-18 17:03:02,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 17:03:02,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 17:03:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-18 17:03:02,476 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 28 states. [2020-08-18 17:03:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:03,713 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-18 17:03:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:03:03,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 17:03:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:03,716 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:03:03,716 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:03:03,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 17:03:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:03:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 17:03:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:03:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 17:03:03,724 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 79 [2020-08-18 17:03:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:03,725 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 17:03:03,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 17:03:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 17:03:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:03:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:03,726 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:03,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:03:03,727 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 16 times [2020-08-18 17:03:03,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:03,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785921121] [2020-08-18 17:03:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:03,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:03,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:03:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-18 17:03:04,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785921121] [2020-08-18 17:03:04,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:04,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:03:04,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680626594] [2020-08-18 17:03:04,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:03:04,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:03:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:03:04,194 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 19 states. [2020-08-18 17:03:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:04,840 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-18 17:03:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:03:04,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-18 17:03:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:04,844 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:03:04,844 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:03:04,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-18 17:03:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:03:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 17:03:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 17:03:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-18 17:03:04,857 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 51 [2020-08-18 17:03:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:04,857 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-18 17:03:04,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:03:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-18 17:03:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 17:03:04,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:04,860 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:04,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:03:04,861 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-18 17:03:04,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:04,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324035789] [2020-08-18 17:03:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:04,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:04,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:03:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-18 17:03:05,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324035789] [2020-08-18 17:03:05,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:05,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 17:03:05,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206859692] [2020-08-18 17:03:05,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 17:03:05,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 17:03:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:03:05,692 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-18 17:03:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:06,904 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-18 17:03:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:03:06,905 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-18 17:03:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:06,906 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:06,906 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:06,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 17:03:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 17:03:06,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-18 17:03:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:06,914 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 17:03:06,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 17:03:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 17:03:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:03:06,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:06,915 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:06,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:03:06,915 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-18 17:03:06,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:06,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225684781] [2020-08-18 17:03:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:06,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:06,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:03:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-18 17:03:07,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225684781] [2020-08-18 17:03:07,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:07,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 17:03:07,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023623780] [2020-08-18 17:03:07,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 17:03:07,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:07,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 17:03:07,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-18 17:03:07,799 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-18 17:03:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:09,196 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-18 17:03:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:03:09,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 17:03:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:09,198 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:03:09,198 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:03:09,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 17:03:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:03:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-18 17:03:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 17:03:09,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-18 17:03:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:09,206 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 17:03:09,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 17:03:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 17:03:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 17:03:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:09,207 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:09,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:03:09,208 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-18 17:03:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:09,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483499604] [2020-08-18 17:03:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:03:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:09,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 17:03:10,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483499604] [2020-08-18 17:03:10,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:10,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 17:03:10,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304969628] [2020-08-18 17:03:10,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 17:03:10,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 17:03:10,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:03:10,225 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-18 17:03:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:11,811 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-18 17:03:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:03:11,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 17:03:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:11,823 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:11,823 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:11,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 17:03:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-18 17:03:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 17:03:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-18 17:03:11,834 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-18 17:03:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:11,835 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-18 17:03:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 17:03:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-18 17:03:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:03:11,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:11,836 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:11,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:03:11,837 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-18 17:03:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:11,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145641536] [2020-08-18 17:03:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:11,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:11,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:11,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-18 17:03:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145641536] [2020-08-18 17:03:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:03:12,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937905234] [2020-08-18 17:03:12,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:03:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:03:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:03:12,340 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-18 17:03:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:13,073 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-18 17:03:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:03:13,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-18 17:03:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:13,076 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:13,076 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:13,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:03:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-18 17:03:13,083 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-18 17:03:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:13,083 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-18 17:03:13,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:03:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-18 17:03:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 17:03:13,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:13,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:13,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:03:13,085 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-18 17:03:13,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:13,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575974460] [2020-08-18 17:03:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 17:03:14,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575974460] [2020-08-18 17:03:14,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:14,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 17:03:14,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694080962] [2020-08-18 17:03:14,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 17:03:14,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 17:03:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:03:14,015 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-18 17:03:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:15,293 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-18 17:03:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:03:15,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 17:03:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:15,295 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:15,295 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:15,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 17:03:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-18 17:03:15,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-18 17:03:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:15,302 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-18 17:03:15,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 17:03:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-18 17:03:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:03:15,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:15,303 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:15,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:03:15,303 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-18 17:03:15,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:15,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692820854] [2020-08-18 17:03:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-18 17:03:15,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692820854] [2020-08-18 17:03:15,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:15,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:03:15,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661518536] [2020-08-18 17:03:15,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:03:15,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:03:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:03:15,855 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-18 17:03:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:16,741 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-18 17:03:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:03:16,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-18 17:03:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:16,743 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:16,743 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:16,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 17:03:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-18 17:03:16,749 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-18 17:03:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:16,750 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-18 17:03:16,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:03:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-18 17:03:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 17:03:16,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:16,751 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:16,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:03:16,751 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 23 times [2020-08-18 17:03:16,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:16,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040397641] [2020-08-18 17:03:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:16,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:16,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:17,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:17,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:17,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:17,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-18 17:03:17,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040397641] [2020-08-18 17:03:17,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:17,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 17:03:17,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660036641] [2020-08-18 17:03:17,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 17:03:17,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 17:03:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:03:17,406 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 24 states. [2020-08-18 17:03:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:18,318 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-18 17:03:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:03:18,319 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-18 17:03:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:18,321 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:18,321 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:18,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:03:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-18 17:03:18,328 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 65 [2020-08-18 17:03:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:18,331 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-18 17:03:18,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 17:03:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-18 17:03:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 17:03:18,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:18,332 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:18,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:03:18,332 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-18 17:03:18,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:18,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107059894] [2020-08-18 17:03:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:19,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:19,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 17:03:19,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107059894] [2020-08-18 17:03:19,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:19,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 17:03:19,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413909415] [2020-08-18 17:03:19,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 17:03:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 17:03:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:03:19,393 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-18 17:03:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:20,875 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-18 17:03:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:03:20,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 17:03:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:20,878 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:20,879 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:20,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 17:03:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 17:03:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:03:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 17:03:20,885 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-18 17:03:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:20,886 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 17:03:20,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 17:03:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 17:03:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 17:03:20,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:20,887 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:20,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:03:20,887 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 25 times [2020-08-18 17:03:20,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:20,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484193217] [2020-08-18 17:03:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:20,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:21,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:22,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-18 17:03:22,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484193217] [2020-08-18 17:03:22,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:22,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 17:03:22,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633241677] [2020-08-18 17:03:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 17:03:22,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 17:03:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-18 17:03:22,151 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 32 states. [2020-08-18 17:03:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:23,761 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-18 17:03:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:03:23,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-18 17:03:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:23,763 INFO L225 Difference]: With dead ends: 53 [2020-08-18 17:03:23,764 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 17:03:23,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 17:03:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 17:03:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-18 17:03:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 17:03:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-18 17:03:23,770 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-08-18 17:03:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:23,771 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-18 17:03:23,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 17:03:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-18 17:03:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:03:23,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:23,772 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:23,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:03:23,773 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-18 17:03:23,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:23,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564730613] [2020-08-18 17:03:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:23,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:23,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:23,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:03:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-18 17:03:24,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564730613] [2020-08-18 17:03:24,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:24,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 17:03:24,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828334532] [2020-08-18 17:03:24,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 17:03:24,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 17:03:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-18 17:03:24,842 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-18 17:03:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:26,422 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-18 17:03:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:03:26,423 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-18 17:03:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:26,424 INFO L225 Difference]: With dead ends: 56 [2020-08-18 17:03:26,424 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 17:03:26,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 17:03:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 17:03:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-18 17:03:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:03:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 17:03:26,434 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-18 17:03:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:26,435 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 17:03:26,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 17:03:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 17:03:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 17:03:26,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:26,436 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:26,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:03:26,436 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-18 17:03:26,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:26,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745627948] [2020-08-18 17:03:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:03:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:26,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:27,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:27,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 17:03:27,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745627948] [2020-08-18 17:03:27,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:27,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 17:03:27,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797788742] [2020-08-18 17:03:27,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 17:03:27,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 17:03:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:03:27,527 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-18 17:03:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:29,147 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-18 17:03:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:03:29,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 17:03:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:29,150 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:03:29,150 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:03:29,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 17:03:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:03:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 17:03:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:03:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 17:03:29,157 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-18 17:03:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:29,157 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 17:03:29,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 17:03:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 17:03:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 17:03:29,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:29,158 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:29,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 17:03:29,159 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:29,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-18 17:03:29,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:29,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179820816] [2020-08-18 17:03:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:03:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:30,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-18 17:03:30,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179820816] [2020-08-18 17:03:30,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:30,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 17:03:30,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78285248] [2020-08-18 17:03:30,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 17:03:30,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 17:03:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-18 17:03:30,327 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-18 17:03:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:32,200 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-18 17:03:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:03:32,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-18 17:03:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:32,202 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:03:32,202 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:03:32,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 17:03:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:03:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 17:03:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:03:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 17:03:32,209 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-18 17:03:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:32,210 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 17:03:32,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 17:03:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 17:03:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 17:03:32,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:32,211 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:32,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 17:03:32,211 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-18 17:03:32,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:32,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427947474] [2020-08-18 17:03:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:03:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:32,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-18 17:03:33,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427947474] [2020-08-18 17:03:33,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:33,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 17:03:33,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65089434] [2020-08-18 17:03:33,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 17:03:33,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 17:03:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 17:03:33,729 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states. [2020-08-18 17:03:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:35,761 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-08-18 17:03:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:03:35,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-08-18 17:03:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:35,762 INFO L225 Difference]: With dead ends: 56 [2020-08-18 17:03:35,762 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 17:03:35,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 17:03:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 17:03:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-18 17:03:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 17:03:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-18 17:03:35,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-08-18 17:03:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:35,768 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-18 17:03:35,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 17:03:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-18 17:03:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 17:03:35,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:35,769 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:35,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 17:03:35,769 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1159270008, now seen corresponding path program 30 times [2020-08-18 17:03:35,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:35,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538015964] [2020-08-18 17:03:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:35,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:35,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:35,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:35,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:03:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-08-18 17:03:36,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538015964] [2020-08-18 17:03:36,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:03:36,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:03:36,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250551297] [2020-08-18 17:03:36,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:03:36,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:03:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:03:36,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:03:36,420 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 21 states. [2020-08-18 17:03:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:03:37,417 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-08-18 17:03:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:03:37,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-08-18 17:03:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:03:37,420 INFO L225 Difference]: With dead ends: 56 [2020-08-18 17:03:37,420 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 17:03:37,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 17:03:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 17:03:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-18 17:03:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:03:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2020-08-18 17:03:37,427 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 93 [2020-08-18 17:03:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:03:37,427 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2020-08-18 17:03:37,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:03:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2020-08-18 17:03:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:03:37,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:03:37,428 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:03:37,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 17:03:37,429 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:03:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:03:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash -505812782, now seen corresponding path program 31 times [2020-08-18 17:03:37,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:03:37,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390547463] [2020-08-18 17:03:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:03:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:03:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:37,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:03:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:37,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:03:37,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:03:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat