/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=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:43:09,024 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:43:09,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:09,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:09,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:09,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:09,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:09,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:09,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:09,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:09,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:09,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:09,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:09,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:09,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:43:09,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:09,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:09,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:09,123 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 22:43:09,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:09,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:09,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:09,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:09,146 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:09,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:09,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:09,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:09,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:09,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:09,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:09,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:09,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:09,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:09,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:09,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:09,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:09,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:09,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:09,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:09,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:09,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:09,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:09,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:09,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:09,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:09,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:09,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:09,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:09,151 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=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:09,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:09,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:09,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:09,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:09,519 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:09,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 22:43:09,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bb7b3bc/56952a7e8cfe49008c34f0d5838b9fcd/FLAGa93ccaebb [2020-08-18 22:43:10,059 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:10,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 22:43:10,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bb7b3bc/56952a7e8cfe49008c34f0d5838b9fcd/FLAGa93ccaebb [2020-08-18 22:43:10,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bb7b3bc/56952a7e8cfe49008c34f0d5838b9fcd [2020-08-18 22:43:10,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:10,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:10,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:10,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:10,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:10,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d0bdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10, skipping insertion in model container [2020-08-18 22:43:10,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:10,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:10,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:10,653 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:10,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:10,684 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:10,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10 WrapperNode [2020-08-18 22:43:10,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:10,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:10,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:10,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:10,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (1/1) ... [2020-08-18 22:43:10,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:10,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:10,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:10,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:10,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (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 22:43:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 22:43:10,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:10,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 22:43:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:11,035 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:11,036 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:43:11,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:11 BoogieIcfgContainer [2020-08-18 22:43:11,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:11,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:11,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:11,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:11,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:10" (1/3) ... [2020-08-18 22:43:11,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ef369d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:11, skipping insertion in model container [2020-08-18 22:43:11,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:10" (2/3) ... [2020-08-18 22:43:11,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ef369d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:11, skipping insertion in model container [2020-08-18 22:43:11,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:11" (3/3) ... [2020-08-18 22:43:11,054 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-08-18 22:43:11,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:11,072 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:11,086 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:11,116 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:11,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:11,116 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:11,116 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:11,116 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:11,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:11,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:11,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 22:43:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:43:11,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:11,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:11,140 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 22:43:11,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:11,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296685547] [2020-08-18 22:43:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296685547] [2020-08-18 22:43:11,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:11,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:43:11,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507683049] [2020-08-18 22:43:11,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:43:11,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:11,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:43:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:11,392 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 22:43:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:11,484 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 22:43:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:11,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:43:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:11,497 INFO L225 Difference]: With dead ends: 30 [2020-08-18 22:43:11,497 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 22:43:11,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 22:43:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 22:43:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 22:43:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:43:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 22:43:11,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 22:43:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:11,550 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 22:43:11,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:43:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 22:43:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:11,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:11,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:11,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:11,556 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 22:43:11,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:11,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980351934] [2020-08-18 22:43:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:11,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980351934] [2020-08-18 22:43:11,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:11,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:43:11,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738850045] [2020-08-18 22:43:11,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:43:11,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:43:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:11,716 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 22:43:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:11,822 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 22:43:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:43:11,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 22:43:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:11,825 INFO L225 Difference]: With dead ends: 25 [2020-08-18 22:43:11,825 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 22:43:11,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:43:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 22:43:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 22:43:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 22:43:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 22:43:11,834 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 22:43:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:11,834 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 22:43:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:43:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 22:43:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:11,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:11,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:11,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:11,837 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 22:43:11,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:11,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94540864] [2020-08-18 22:43:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:11,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 22:43:12,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94540864] [2020-08-18 22:43:12,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:12,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:43:12,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463720090] [2020-08-18 22:43:12,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:43:12,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:43:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:43:12,016 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 22:43:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:12,091 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 22:43:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:43:12,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 22:43:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:12,094 INFO L225 Difference]: With dead ends: 28 [2020-08-18 22:43:12,094 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 22:43:12,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:43:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 22:43:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 22:43:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 22:43:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 22:43:12,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 22:43:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:12,103 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 22:43:12,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:43:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 22:43:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 22:43:12,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:12,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:12,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:12,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:12,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 22:43:12,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:12,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203373448] [2020-08-18 22:43:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:43:12,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203373448] [2020-08-18 22:43:12,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:12,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:43:12,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980915991] [2020-08-18 22:43:12,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:43:12,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:43:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:43:12,288 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 22:43:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:12,378 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 22:43:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:43:12,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 22:43:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:12,380 INFO L225 Difference]: With dead ends: 31 [2020-08-18 22:43:12,380 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 22:43:12,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:43:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 22:43:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 22:43:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:43:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 22:43:12,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 22:43:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:12,388 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 22:43:12,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:43:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 22:43:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:43:12,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:12,390 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:12,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:12,391 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:12,391 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 22:43:12,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:12,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738417486] [2020-08-18 22:43:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 22:43:12,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738417486] [2020-08-18 22:43:12,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:12,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:43:12,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837396267] [2020-08-18 22:43:12,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:43:12,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:43:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:43:12,624 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 22:43:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:12,717 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 22:43:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:43:12,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 22:43:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:12,719 INFO L225 Difference]: With dead ends: 34 [2020-08-18 22:43:12,719 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 22:43:12,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:43:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 22:43:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 22:43:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:43:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 22:43:12,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 22:43:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:12,728 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 22:43:12,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:43:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 22:43:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 22:43:12,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:12,729 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:12,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:12,730 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 22:43:12,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:12,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870525218] [2020-08-18 22:43:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 22:43:12,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870525218] [2020-08-18 22:43:12,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:12,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:43:12,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646455572] [2020-08-18 22:43:12,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:43:12,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:43:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:43:12,914 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 22:43:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:13,006 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 22:43:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:43:13,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 22:43:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:13,008 INFO L225 Difference]: With dead ends: 37 [2020-08-18 22:43:13,008 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 22:43:13,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:43:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 22:43:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 22:43:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:43:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 22:43:13,016 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 22:43:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:13,016 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 22:43:13,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:43:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 22:43:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 22:43:13,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:13,018 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:13,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:13,019 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 22:43:13,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:13,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256696936] [2020-08-18 22:43:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 22:43:13,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256696936] [2020-08-18 22:43:13,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:13,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:43:13,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680607257] [2020-08-18 22:43:13,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:43:13,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:43:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:43:13,266 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 22:43:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:13,403 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 22:43:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:43:13,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 22:43:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:13,405 INFO L225 Difference]: With dead ends: 40 [2020-08-18 22:43:13,405 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:43:13,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:43:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:43:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 22:43:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:43:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 22:43:13,420 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 22:43:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:13,421 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 22:43:13,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:43:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 22:43:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 22:43:13,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:13,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:13,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:13,426 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 22:43:13,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:13,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239028577] [2020-08-18 22:43:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 22:43:13,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239028577] [2020-08-18 22:43:13,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:13,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:43:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192147292] [2020-08-18 22:43:13,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:43:13,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:43:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:43:13,748 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 22:43:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:13,876 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 22:43:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:43:13,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 22:43:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:13,878 INFO L225 Difference]: With dead ends: 43 [2020-08-18 22:43:13,878 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 22:43:13,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:43:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 22:43:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 22:43:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 22:43:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 22:43:13,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 22:43:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:13,886 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 22:43:13,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:43:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 22:43:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 22:43:13,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:13,888 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:13,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:13,888 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 22:43:13,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:13,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966981200] [2020-08-18 22:43:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:13,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 22:43:14,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966981200] [2020-08-18 22:43:14,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:14,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:43:14,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405168035] [2020-08-18 22:43:14,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:43:14,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:43:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:43:14,202 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 22:43:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:14,370 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 22:43:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:43:14,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 22:43:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:14,372 INFO L225 Difference]: With dead ends: 46 [2020-08-18 22:43:14,372 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 22:43:14,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:43:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 22:43:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 22:43:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:43:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 22:43:14,380 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 22:43:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:14,381 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 22:43:14,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:43:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 22:43:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 22:43:14,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:14,382 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:14,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:43:14,383 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 22:43:14,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:14,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636246134] [2020-08-18 22:43:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 22:43:14,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636246134] [2020-08-18 22:43:14,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:14,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:43:14,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120114515] [2020-08-18 22:43:14,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:43:14,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:43:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:43:14,698 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 22:43:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:14,839 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 22:43:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:43:14,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 22:43:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:14,841 INFO L225 Difference]: With dead ends: 49 [2020-08-18 22:43:14,841 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 22:43:14,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:43:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 22:43:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 22:43:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 22:43:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 22:43:14,853 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 22:43:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:14,855 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 22:43:14,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:43:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 22:43:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 22:43:14,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:14,857 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:14,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:43:14,858 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:14,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 22:43:14,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:14,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103765062] [2020-08-18 22:43:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:14,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 22:43:15,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103765062] [2020-08-18 22:43:15,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:15,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:43:15,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242349469] [2020-08-18 22:43:15,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:43:15,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:43:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:43:15,291 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 22:43:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:15,470 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 22:43:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:43:15,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 22:43:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:15,471 INFO L225 Difference]: With dead ends: 52 [2020-08-18 22:43:15,472 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 22:43:15,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:43:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 22:43:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 22:43:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:43:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 22:43:15,479 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 22:43:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:15,480 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 22:43:15,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:43:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 22:43:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 22:43:15,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:15,482 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:15,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:15,482 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:15,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-18 22:43:15,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:15,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342591834] [2020-08-18 22:43:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 22:43:15,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342591834] [2020-08-18 22:43:15,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:15,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:43:15,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89140852] [2020-08-18 22:43:15,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:43:15,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:43:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:43:15,898 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 22:43:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:16,105 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 22:43:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:43:16,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 22:43:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:16,107 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:43:16,107 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 22:43:16,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:43:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 22:43:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 22:43:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 22:43:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 22:43:16,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 22:43:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:16,115 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 22:43:16,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:43:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 22:43:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 22:43:16,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:16,117 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:16,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:16,117 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-18 22:43:16,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:16,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130151533] [2020-08-18 22:43:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 22:43:16,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130151533] [2020-08-18 22:43:16,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:16,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:43:16,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814401670] [2020-08-18 22:43:16,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:43:16,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:43:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:43:16,653 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 22:43:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:16,848 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 22:43:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:43:16,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 22:43:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:16,850 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:43:16,850 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:43:16,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:43:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:43:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 22:43:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:43:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 22:43:16,857 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 22:43:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:16,857 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 22:43:16,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:43:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 22:43:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 22:43:16,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:16,862 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:16,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:16,862 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-18 22:43:16,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:16,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120448833] [2020-08-18 22:43:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:16,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 22:43:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120448833] [2020-08-18 22:43:17,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:17,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:43:17,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219568985] [2020-08-18 22:43:17,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:43:17,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:43:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:43:17,525 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 22:43:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:17,741 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 22:43:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:43:17,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 22:43:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:17,743 INFO L225 Difference]: With dead ends: 61 [2020-08-18 22:43:17,743 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 22:43:17,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:43:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 22:43:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 22:43:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 22:43:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 22:43:17,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 22:43:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:17,757 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 22:43:17,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:43:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 22:43:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 22:43:17,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:17,761 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:17,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:17,762 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-18 22:43:17,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:17,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023061672] [2020-08-18 22:43:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 22:43:18,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023061672] [2020-08-18 22:43:18,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:18,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:43:18,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699326168] [2020-08-18 22:43:18,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:43:18,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:43:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:43:18,368 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 22:43:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:18,593 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 22:43:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 22:43:18,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 22:43:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:18,595 INFO L225 Difference]: With dead ends: 64 [2020-08-18 22:43:18,595 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:43:18,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:43:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:43:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 22:43:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 22:43:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 22:43:18,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 22:43:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:18,611 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 22:43:18,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:43:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 22:43:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 22:43:18,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:18,613 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:18,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:18,614 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-18 22:43:18,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:18,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163082713] [2020-08-18 22:43:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:18,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 22:43:19,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163082713] [2020-08-18 22:43:19,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:19,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:43:19,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461023651] [2020-08-18 22:43:19,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:43:19,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:43:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:43:19,276 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 22:43:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:19,526 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 22:43:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:43:19,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 22:43:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:19,528 INFO L225 Difference]: With dead ends: 67 [2020-08-18 22:43:19,528 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 22:43:19,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:43:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 22:43:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 22:43:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 22:43:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 22:43:19,545 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 22:43:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:19,546 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 22:43:19,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:43:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 22:43:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 22:43:19,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:19,549 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:19,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:19,549 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-18 22:43:19,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:19,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666957978] [2020-08-18 22:43:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:19,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 22:43:20,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666957978] [2020-08-18 22:43:20,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:20,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:43:20,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362480704] [2020-08-18 22:43:20,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:43:20,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:20,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:43:20,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:43:20,172 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 22:43:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:20,462 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 22:43:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:43:20,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 22:43:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:20,464 INFO L225 Difference]: With dead ends: 70 [2020-08-18 22:43:20,464 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 22:43:20,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:43:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 22:43:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 22:43:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 22:43:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 22:43:20,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 22:43:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:20,471 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 22:43:20,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:43:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 22:43:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 22:43:20,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:20,473 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:20,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:20,473 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-18 22:43:20,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:20,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808758026] [2020-08-18 22:43:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:20,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 22:43:21,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808758026] [2020-08-18 22:43:21,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:21,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:43:21,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815260437] [2020-08-18 22:43:21,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:43:21,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:43:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:43:21,355 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 22:43:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:21,669 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 22:43:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:43:21,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 22:43:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:21,671 INFO L225 Difference]: With dead ends: 73 [2020-08-18 22:43:21,671 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 22:43:21,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 22:43:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 22:43:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 22:43:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 22:43:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 22:43:21,677 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 22:43:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:21,678 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 22:43:21,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:43:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 22:43:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:43:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:21,680 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:21,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:21,680 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-18 22:43:21,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:21,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185647875] [2020-08-18 22:43:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:21,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 22:43:22,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185647875] [2020-08-18 22:43:22,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:22,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:43:22,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332239676] [2020-08-18 22:43:22,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:43:22,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:43:22,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:43:22,493 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 22:43:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:22,760 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 22:43:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 22:43:22,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 22:43:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:22,761 INFO L225 Difference]: With dead ends: 76 [2020-08-18 22:43:22,762 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 22:43:22,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:43:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 22:43:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 22:43:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 22:43:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 22:43:22,768 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 22:43:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:22,769 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 22:43:22,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:43:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 22:43:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 22:43:22,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:22,770 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:22,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:22,771 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-18 22:43:22,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:22,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488289279] [2020-08-18 22:43:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:22,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 22:43:23,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488289279] [2020-08-18 22:43:23,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:23,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:43:23,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901465650] [2020-08-18 22:43:23,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:43:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:43:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:43:23,813 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 22:43:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:24,244 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 22:43:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:43:24,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 22:43:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:24,245 INFO L225 Difference]: With dead ends: 79 [2020-08-18 22:43:24,246 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 22:43:24,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:43:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 22:43:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 22:43:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 22:43:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 22:43:24,258 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 22:43:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:24,259 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 22:43:24,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:43:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 22:43:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 22:43:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:24,262 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:24,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:24,263 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-18 22:43:24,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:24,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384341768] [2020-08-18 22:43:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:24,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-08-18 22:43:25,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384341768] [2020-08-18 22:43:25,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:25,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:43:25,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139889505] [2020-08-18 22:43:25,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:43:25,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:43:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:43:25,483 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 8 states. [2020-08-18 22:43:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:25,573 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-08-18 22:43:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:43:25,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-08-18 22:43:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:25,574 INFO L225 Difference]: With dead ends: 75 [2020-08-18 22:43:25,574 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:43:25,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:43:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:43:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:43:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:43:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:43:25,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-08-18 22:43:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:25,576 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:43:25,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:43:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:43:25,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:43:25,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:43:25,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:43:25,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:43:25,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:25,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:25,608 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:43:25,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:43:25,609 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:43:25,609 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-18 22:43:25,609 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-18 22:43:25,609 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-18 22:43:25,609 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-18 22:43:25,609 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-18 22:43:25,610 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-18 22:43:25,610 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-18 22:43:25,610 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-18 22:43:25,610 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-18 22:43:25,610 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-18 22:43:25,610 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-18 22:43:25,610 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2020-08-18 22:43:25,611 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-18 22:43:25,611 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-18 22:43:25,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:25 BoogieIcfgContainer [2020-08-18 22:43:25,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:25,620 INFO L168 Benchmark]: Toolchain (without parser) took 15181.72 ms. Allocated memory was 145.8 MB in the beginning and 492.3 MB in the end (delta: 346.6 MB). Free memory was 101.9 MB in the beginning and 130.7 MB in the end (delta: -28.8 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:25,621 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:43:25,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.32 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:25,622 INFO L168 Benchmark]: Boogie Preprocessor took 115.32 ms. Allocated memory was 145.8 MB in the beginning and 200.8 MB in the end (delta: 55.1 MB). Free memory was 92.3 MB in the beginning and 179.8 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:25,622 INFO L168 Benchmark]: RCFGBuilder took 241.80 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:25,623 INFO L168 Benchmark]: TraceAbstraction took 14572.41 ms. Allocated memory was 200.8 MB in the beginning and 492.3 MB in the end (delta: 291.5 MB). Free memory was 167.8 MB in the beginning and 130.7 MB in the end (delta: 37.2 MB). Peak memory consumption was 328.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:25,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.32 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.32 ms. Allocated memory was 145.8 MB in the beginning and 200.8 MB in the end (delta: 55.1 MB). Free memory was 92.3 MB in the beginning and 179.8 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.80 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14572.41 ms. Allocated memory was 200.8 MB in the beginning and 492.3 MB in the end (delta: 291.5 MB). Free memory was 167.8 MB in the beginning and 130.7 MB in the end (delta: 37.2 MB). Peak memory consumption was 328.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.4s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 525 SDslu, 1157 SDs, 0 SdLazy, 853 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1034 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1512 ConstructedInterpolants, 0 QuantifiedInterpolants, 435840 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5020/8820 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...