/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:27:43,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:27:43,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:27:43,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 19:27:43,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:27:43,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:27:43,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:27:43,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:27:43,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:27:43,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:27:43,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:27:43,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:27:43,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:27:43,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:27:43,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:27:43,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:27:43,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:27:43,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:27:43,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:27:43,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:27:43,650 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 19:27:43,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:27:43,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:27:43,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:27:43,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:27:43,696 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:27:43,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:27:43,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:27:43,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:27:43,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:27:43,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:27:43,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:27:43,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:27:43,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:27:43,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:27:43,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:27:43,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:27:43,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:27:43,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:27:43,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:27:43,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:27:43,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:27:43,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:27:43,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:27:43,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:27:43,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:27:43,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:27:43,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:27:43,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:27:43,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:27:43,703 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:27:44,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:27:44,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:27:44,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:27:44,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:27:44,060 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:27:44,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-18 19:27:44,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3c5bf876/3b4c4d8fdeed44c4ae014fcd00ef7dae/FLAG71c8644c2 [2020-08-18 19:27:44,620 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:27:44,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-18 19:27:44,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3c5bf876/3b4c4d8fdeed44c4ae014fcd00ef7dae/FLAG71c8644c2 [2020-08-18 19:27:44,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3c5bf876/3b4c4d8fdeed44c4ae014fcd00ef7dae [2020-08-18 19:27:44,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:27:44,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:27:44,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:45,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:27:45,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:27:45,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:44" (1/1) ... [2020-08-18 19:27:45,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4940f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45, skipping insertion in model container [2020-08-18 19:27:45,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:44" (1/1) ... [2020-08-18 19:27:45,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:27:45,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:27:45,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:45,269 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:27:45,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:45,296 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:27:45,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45 WrapperNode [2020-08-18 19:27:45,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:45,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:27:45,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:27:45,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:27:45,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (1/1) ... [2020-08-18 19:27:45,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:27:45,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:27:45,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:27:45,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:27:45,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (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 19:27:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:27:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:27:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-18 19:27:45,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:27:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:27:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:27:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-18 19:27:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:27:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:27:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:27:45,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:27:45,663 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 19:27:45,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:45 BoogieIcfgContainer [2020-08-18 19:27:45,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:27:45,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:27:45,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:27:45,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:27:45,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:27:44" (1/3) ... [2020-08-18 19:27:45,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:45, skipping insertion in model container [2020-08-18 19:27:45,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:45" (2/3) ... [2020-08-18 19:27:45,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:45, skipping insertion in model container [2020-08-18 19:27:45,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:45" (3/3) ... [2020-08-18 19:27:45,674 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-18 19:27:45,685 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:27:45,692 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:27:45,706 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:27:45,732 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:27:45,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:27:45,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:27:45,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:27:45,733 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:27:45,733 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:27:45,733 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:27:45,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:27:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-18 19:27:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 19:27:45,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:45,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:45,761 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-18 19:27:45,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:45,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506235601] [2020-08-18 19:27:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:45,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,009 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 19:27:46,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506235601] [2020-08-18 19:27:46,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:27:46,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:27:46,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800398723] [2020-08-18 19:27:46,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:27:46,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:27:46,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:27:46,046 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-18 19:27:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:46,197 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 19:27:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 19:27:46,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 19:27:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:46,209 INFO L225 Difference]: With dead ends: 33 [2020-08-18 19:27:46,210 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 19:27:46,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:27:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 19:27:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 19:27:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 19:27:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 19:27:46,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-18 19:27:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:46,252 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 19:27:46,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:27:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 19:27:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:27:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:46,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:46,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:27:46,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-18 19:27:46,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:46,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394371315] [2020-08-18 19:27:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,417 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 19:27:46,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394371315] [2020-08-18 19:27:46,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:46,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 19:27:46,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278952796] [2020-08-18 19:27:46,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:27:46,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:27:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:27:46,421 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-18 19:27:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:46,546 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-18 19:27:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:27:46,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 19:27:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:46,548 INFO L225 Difference]: With dead ends: 26 [2020-08-18 19:27:46,548 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 19:27:46,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:27:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 19:27:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-18 19:27:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 19:27:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-18 19:27:46,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-18 19:27:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:46,557 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-18 19:27:46,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:27:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-18 19:27:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:27:46,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:46,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:46,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:27:46,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-18 19:27:46,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:46,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447608186] [2020-08-18 19:27:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:46,847 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 19:27:46,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447608186] [2020-08-18 19:27:46,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:46,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:27:46,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604140516] [2020-08-18 19:27:46,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:27:46,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:27:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:27:46,857 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-18 19:27:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:47,056 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-18 19:27:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:27:47,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-18 19:27:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:47,058 INFO L225 Difference]: With dead ends: 29 [2020-08-18 19:27:47,058 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 19:27:47,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:27:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 19:27:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 19:27:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 19:27:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-18 19:27:47,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-18 19:27:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:47,066 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-18 19:27:47,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:27:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-18 19:27:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 19:27:47,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:47,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:47,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:27:47,069 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-18 19:27:47,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:47,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017325633] [2020-08-18 19:27:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,272 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 19:27:47,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017325633] [2020-08-18 19:27:47,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:47,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:27:47,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638720569] [2020-08-18 19:27:47,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:27:47,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:27:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:27:47,275 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-18 19:27:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:47,490 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-18 19:27:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:27:47,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-18 19:27:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:47,493 INFO L225 Difference]: With dead ends: 32 [2020-08-18 19:27:47,493 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 19:27:47,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-08-18 19:27:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 19:27:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 19:27:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 19:27:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-18 19:27:47,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-18 19:27:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:47,501 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-18 19:27:47,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:27:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-18 19:27:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 19:27:47,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:47,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:47,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:27:47,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-18 19:27:47,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:47,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393693783] [2020-08-18 19:27:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:47,755 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 19:27:47,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393693783] [2020-08-18 19:27:47,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:47,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 19:27:47,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931544881] [2020-08-18 19:27:47,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 19:27:47,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 19:27:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:27:47,759 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-18 19:27:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:48,044 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-18 19:27:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 19:27:48,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-18 19:27:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:48,046 INFO L225 Difference]: With dead ends: 35 [2020-08-18 19:27:48,046 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 19:27:48,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-18 19:27:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 19:27:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 19:27:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 19:27:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-18 19:27:48,053 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-18 19:27:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:48,054 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-18 19:27:48,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 19:27:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-18 19:27:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 19:27:48,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:48,056 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:48,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:27:48,056 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-18 19:27:48,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:48,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112626309] [2020-08-18 19:27:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,335 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 19:27:48,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112626309] [2020-08-18 19:27:48,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:48,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 19:27:48,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816008531] [2020-08-18 19:27:48,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 19:27:48,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 19:27:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:27:48,339 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-18 19:27:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:48,679 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-18 19:27:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 19:27:48,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-18 19:27:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:48,681 INFO L225 Difference]: With dead ends: 38 [2020-08-18 19:27:48,681 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 19:27:48,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-08-18 19:27:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 19:27:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-18 19:27:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 19:27:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-18 19:27:48,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-18 19:27:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:48,690 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-18 19:27:48,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 19:27:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-18 19:27:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 19:27:48,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:48,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:48,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:27:48,692 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-18 19:27:48,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:48,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581631431] [2020-08-18 19:27:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:48,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,020 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 19:27:49,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581631431] [2020-08-18 19:27:49,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:49,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 19:27:49,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219270111] [2020-08-18 19:27:49,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 19:27:49,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 19:27:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:27:49,023 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-18 19:27:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:49,475 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-18 19:27:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 19:27:49,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-18 19:27:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:49,478 INFO L225 Difference]: With dead ends: 41 [2020-08-18 19:27:49,478 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 19:27:49,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-18 19:27:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 19:27:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 19:27:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 19:27:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-18 19:27:49,493 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-18 19:27:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:49,493 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-18 19:27:49,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 19:27:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-18 19:27:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 19:27:49,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:49,497 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:49,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:27:49,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-18 19:27:49,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:49,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779162480] [2020-08-18 19:27:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:49,881 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 19:27:49,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779162480] [2020-08-18 19:27:49,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:49,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 19:27:49,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333370496] [2020-08-18 19:27:49,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 19:27:49,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:49,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 19:27:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 19:27:49,884 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-18 19:27:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:50,433 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-18 19:27:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 19:27:50,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-18 19:27:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:50,435 INFO L225 Difference]: With dead ends: 44 [2020-08-18 19:27:50,436 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 19:27:50,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 19:27:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 19:27:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-18 19:27:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 19:27:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-18 19:27:50,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-18 19:27:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:50,454 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-18 19:27:50,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 19:27:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-18 19:27:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 19:27:50,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:50,469 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:50,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:27:50,470 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-18 19:27:50,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:50,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961932248] [2020-08-18 19:27:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:50,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,018 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 19:27:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961932248] [2020-08-18 19:27:51,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:51,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 19:27:51,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195684253] [2020-08-18 19:27:51,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 19:27:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 19:27:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-18 19:27:51,022 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-18 19:27:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:51,666 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-18 19:27:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 19:27:51,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-18 19:27:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:51,668 INFO L225 Difference]: With dead ends: 47 [2020-08-18 19:27:51,668 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 19:27:51,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 19:27:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 19:27:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 19:27:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 19:27:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-18 19:27:51,677 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-18 19:27:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:51,677 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-18 19:27:51,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 19:27:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-18 19:27:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 19:27:51,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:51,679 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:51,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:27:51,679 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:51,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-18 19:27:51,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:51,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461500726] [2020-08-18 19:27:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:51,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:52,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:52,217 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 19:27:52,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461500726] [2020-08-18 19:27:52,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:52,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 19:27:52,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428937640] [2020-08-18 19:27:52,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 19:27:52,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:52,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 19:27:52,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-18 19:27:52,220 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-18 19:27:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:53,015 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-18 19:27:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 19:27:53,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-18 19:27:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:53,017 INFO L225 Difference]: With dead ends: 50 [2020-08-18 19:27:53,018 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 19:27:53,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 19:27:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 19:27:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-18 19:27:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 19:27:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-18 19:27:53,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-18 19:27:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:53,026 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-18 19:27:53,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 19:27:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-18 19:27:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 19:27:53,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:53,027 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:53,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:27:53,027 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-18 19:27:53,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:53,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136855073] [2020-08-18 19:27:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:53,710 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 19:27:53,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136855073] [2020-08-18 19:27:53,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:53,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 19:27:53,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122215527] [2020-08-18 19:27:53,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 19:27:53,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 19:27:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-18 19:27:53,713 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-18 19:27:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:54,663 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-18 19:27:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 19:27:54,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-18 19:27:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:54,666 INFO L225 Difference]: With dead ends: 53 [2020-08-18 19:27:54,666 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 19:27:54,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 19:27:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 19:27:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-18 19:27:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 19:27:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-18 19:27:54,675 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-18 19:27:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:54,675 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-18 19:27:54,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 19:27:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-18 19:27:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 19:27:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:54,677 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:54,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:27:54,678 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-18 19:27:54,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:54,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401182583] [2020-08-18 19:27:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:55,541 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 19:27:55,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401182583] [2020-08-18 19:27:55,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:55,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 19:27:55,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196003794] [2020-08-18 19:27:55,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 19:27:55,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 19:27:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-18 19:27:55,544 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-18 19:27:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:56,636 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-18 19:27:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 19:27:56,637 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-18 19:27:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:56,638 INFO L225 Difference]: With dead ends: 56 [2020-08-18 19:27:56,638 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 19:27:56,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 19:27:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 19:27:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 19:27:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 19:27:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-18 19:27:56,647 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-18 19:27:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:56,648 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-18 19:27:56,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 19:27:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-18 19:27:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 19:27:56,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:56,649 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:56,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:27:56,650 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-18 19:27:56,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:56,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288332554] [2020-08-18 19:27:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:56,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:57,509 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 19:27:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288332554] [2020-08-18 19:27:57,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:57,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 19:27:57,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719890129] [2020-08-18 19:27:57,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 19:27:57,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 19:27:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-18 19:27:57,512 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-18 19:27:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:58,774 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-18 19:27:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 19:27:58,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 19:27:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:58,777 INFO L225 Difference]: With dead ends: 59 [2020-08-18 19:27:58,777 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 19:27:58,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 19:27:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 19:27:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 19:27:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 19:27:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-18 19:27:58,785 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-18 19:27:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:58,785 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-18 19:27:58,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 19:27:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-18 19:27:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 19:27:58,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:58,787 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:27:58,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 19:27:58,787 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-18 19:27:58,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:58,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326579061] [2020-08-18 19:27:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:58,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:58,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:58,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:58,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:27:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:59,681 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 19:27:59,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326579061] [2020-08-18 19:27:59,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:27:59,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 19:27:59,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613358254] [2020-08-18 19:27:59,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 19:27:59,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 19:27:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-18 19:27:59,683 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-18 19:28:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:01,194 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-18 19:28:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 19:28:01,197 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-18 19:28:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:01,198 INFO L225 Difference]: With dead ends: 62 [2020-08-18 19:28:01,198 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 19:28:01,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 19:28:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 19:28:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-18 19:28:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 19:28:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-18 19:28:01,206 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-18 19:28:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:01,206 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-18 19:28:01,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 19:28:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-18 19:28:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 19:28:01,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:01,208 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:01,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 19:28:01,208 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-18 19:28:01,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:01,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187190014] [2020-08-18 19:28:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:01,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:02,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:02,329 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 19:28:02,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187190014] [2020-08-18 19:28:02,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:02,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 19:28:02,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446553779] [2020-08-18 19:28:02,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 19:28:02,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 19:28:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 19:28:02,332 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-18 19:28:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:03,980 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-18 19:28:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 19:28:03,981 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-18 19:28:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:03,982 INFO L225 Difference]: With dead ends: 65 [2020-08-18 19:28:03,983 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 19:28:03,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-18 19:28:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 19:28:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-18 19:28:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 19:28:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-18 19:28:03,991 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-18 19:28:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:03,992 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-18 19:28:03,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 19:28:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-18 19:28:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 19:28:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:03,994 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:03,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 19:28:03,994 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-18 19:28:03,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:03,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997235558] [2020-08-18 19:28:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:04,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:05,401 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 19:28:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997235558] [2020-08-18 19:28:05,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:05,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-18 19:28:05,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886852550] [2020-08-18 19:28:05,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-18 19:28:05,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-18 19:28:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 19:28:05,408 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-18 19:28:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:07,265 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-18 19:28:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 19:28:07,265 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-18 19:28:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:07,267 INFO L225 Difference]: With dead ends: 68 [2020-08-18 19:28:07,267 INFO L226 Difference]: Without dead ends: 64 [2020-08-18 19:28:07,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-18 19:28:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-18 19:28:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-18 19:28:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 19:28:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-18 19:28:07,276 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-18 19:28:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:07,277 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-18 19:28:07,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-18 19:28:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-18 19:28:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 19:28:07,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:07,279 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:07,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 19:28:07,279 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-18 19:28:07,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:07,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149381679] [2020-08-18 19:28:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:07,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:08,966 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 19:28:08,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149381679] [2020-08-18 19:28:08,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:08,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-18 19:28:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100053189] [2020-08-18 19:28:08,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-18 19:28:08,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-18 19:28:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 19:28:08,970 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-18 19:28:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:11,016 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-18 19:28:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-18 19:28:11,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-18 19:28:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:11,019 INFO L225 Difference]: With dead ends: 71 [2020-08-18 19:28:11,019 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 19:28:11,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-18 19:28:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 19:28:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-18 19:28:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 19:28:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-18 19:28:11,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-18 19:28:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-18 19:28:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-18 19:28:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-18 19:28:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 19:28:11,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:11,029 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:11,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 19:28:11,030 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-18 19:28:11,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:11,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003371510] [2020-08-18 19:28:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:11,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:12,574 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 19:28:12,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003371510] [2020-08-18 19:28:12,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:12,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-18 19:28:12,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405766138] [2020-08-18 19:28:12,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-18 19:28:12,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-18 19:28:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 19:28:12,577 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-18 19:28:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:14,953 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-18 19:28:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 19:28:14,954 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-18 19:28:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:14,955 INFO L225 Difference]: With dead ends: 74 [2020-08-18 19:28:14,955 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 19:28:14,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-18 19:28:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 19:28:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 19:28:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 19:28:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-18 19:28:14,963 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-18 19:28:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:14,963 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-18 19:28:14,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-18 19:28:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-18 19:28:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 19:28:14,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:14,972 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:14,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 19:28:14,972 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-18 19:28:14,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:14,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503742008] [2020-08-18 19:28:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:16,674 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 19:28:16,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503742008] [2020-08-18 19:28:16,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:16,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-18 19:28:16,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710008520] [2020-08-18 19:28:16,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-18 19:28:16,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:16,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-18 19:28:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 19:28:16,677 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-18 19:28:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:19,287 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-18 19:28:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-18 19:28:19,288 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-18 19:28:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:19,290 INFO L225 Difference]: With dead ends: 77 [2020-08-18 19:28:19,290 INFO L226 Difference]: Without dead ends: 73 [2020-08-18 19:28:19,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-18 19:28:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-18 19:28:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-18 19:28:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 19:28:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-18 19:28:19,298 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-18 19:28:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:19,298 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-18 19:28:19,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-18 19:28:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-18 19:28:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 19:28:19,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:19,300 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:19,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 19:28:19,300 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-18 19:28:19,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:19,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555848953] [2020-08-18 19:28:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:21,133 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 19:28:21,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555848953] [2020-08-18 19:28:21,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:21,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-18 19:28:21,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738345826] [2020-08-18 19:28:21,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-18 19:28:21,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-18 19:28:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 19:28:21,135 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-18 19:28:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:24,043 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-18 19:28:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-18 19:28:24,044 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-18 19:28:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:24,046 INFO L225 Difference]: With dead ends: 80 [2020-08-18 19:28:24,046 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 19:28:24,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-18 19:28:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 19:28:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-18 19:28:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 19:28:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-18 19:28:24,054 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-18 19:28:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:24,054 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-18 19:28:24,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-18 19:28:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-18 19:28:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-18 19:28:24,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:24,056 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:24,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 19:28:24,056 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-18 19:28:24,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:24,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508662314] [2020-08-18 19:28:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:25,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-18 19:28:26,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508662314] [2020-08-18 19:28:26,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:26,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-18 19:28:26,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684182573] [2020-08-18 19:28:26,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-18 19:28:26,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-18 19:28:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 19:28:26,139 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-18 19:28:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:29,419 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-18 19:28:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 19:28:29,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-18 19:28:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:29,422 INFO L225 Difference]: With dead ends: 83 [2020-08-18 19:28:29,422 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 19:28:29,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-18 19:28:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 19:28:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-18 19:28:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 19:28:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-18 19:28:29,430 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-18 19:28:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:29,430 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-18 19:28:29,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-18 19:28:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-18 19:28:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-18 19:28:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:29,432 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:29,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 19:28:29,432 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-18 19:28:29,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:29,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433364867] [2020-08-18 19:28:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:29,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-18 19:28:31,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433364867] [2020-08-18 19:28:31,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:31,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-18 19:28:31,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580425160] [2020-08-18 19:28:31,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-18 19:28:31,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:31,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-18 19:28:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 19:28:31,843 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states. [2020-08-18 19:28:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:35,449 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-08-18 19:28:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-18 19:28:35,453 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2020-08-18 19:28:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:35,454 INFO L225 Difference]: With dead ends: 86 [2020-08-18 19:28:35,454 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 19:28:35,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=265, Invalid=7925, Unknown=0, NotChecked=0, Total=8190 [2020-08-18 19:28:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 19:28:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 19:28:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 19:28:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-08-18 19:28:35,460 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2020-08-18 19:28:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:35,461 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-08-18 19:28:35,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-18 19:28:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-08-18 19:28:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 19:28:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:35,462 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:35,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 19:28:35,463 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1589077567, now seen corresponding path program 22 times [2020-08-18 19:28:35,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:35,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91882220] [2020-08-18 19:28:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:35,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:37,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-18 19:28:38,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91882220] [2020-08-18 19:28:38,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:28:38,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-18 19:28:38,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549101139] [2020-08-18 19:28:38,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-18 19:28:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:28:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-18 19:28:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 19:28:38,091 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 50 states. [2020-08-18 19:28:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:28:42,158 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-18 19:28:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-18 19:28:42,159 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2020-08-18 19:28:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:28:42,161 INFO L225 Difference]: With dead ends: 89 [2020-08-18 19:28:42,161 INFO L226 Difference]: Without dead ends: 85 [2020-08-18 19:28:42,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=277, Invalid=8653, Unknown=0, NotChecked=0, Total=8930 [2020-08-18 19:28:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-18 19:28:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-18 19:28:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 19:28:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-08-18 19:28:42,168 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 146 [2020-08-18 19:28:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:28:42,169 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-08-18 19:28:42,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-18 19:28:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-08-18 19:28:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 19:28:42,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:28:42,170 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:28:42,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 19:28:42,171 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:28:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:28:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 23 times [2020-08-18 19:28:42,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:28:42,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122800752] [2020-08-18 19:28:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:28:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:42,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:28:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:28:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:42,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:28:42,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:28:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat