/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:59:27,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:59:27,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:59:27,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:59:27,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:59:27,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:59:27,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:59:27,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:59:27,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:59:27,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:59:27,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:59:27,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:59:27,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:59:27,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:59:27,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:59:27,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:59:27,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:59:27,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:59:27,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:59:27,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:59:27,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:59:27,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:59:27,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:59:27,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:59:27,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:59:27,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:59:27,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:59:27,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:59:27,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:59:27,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:59:27,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:59:27,823 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:59:27,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:59:27,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:59:27,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:27,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:59:27,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:59:27,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:59:27,824 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:59:28,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:59:28,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:59:28,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:59:28,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:59:28,138 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:59:28,139 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-22 22:59:28,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b73426d/dc52a840a0e84664b023fa3d47045166/FLAG8c05af5da [2020-08-22 22:59:28,679 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:59:28,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-22 22:59:28,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b73426d/dc52a840a0e84664b023fa3d47045166/FLAG8c05af5da [2020-08-22 22:59:29,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67b73426d/dc52a840a0e84664b023fa3d47045166 [2020-08-22 22:59:29,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:59:29,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:59:29,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:29,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:59:29,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:59:29,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35692340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29, skipping insertion in model container [2020-08-22 22:59:29,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:59:29,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:59:29,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:29,365 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:59:29,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:29,402 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:59:29,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29 WrapperNode [2020-08-22 22:59:29,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:29,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:59:29,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:59:29,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:59:29,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... [2020-08-22 22:59:29,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:59:29,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:59:29,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:59:29,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:59:29,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:29,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:59:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:59:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 22:59:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 22:59:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:59:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:59:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:59:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:59:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:59:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:59:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:59:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:59:29,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:59:29,853 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 22:59:29,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:29 BoogieIcfgContainer [2020-08-22 22:59:29,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:59:29,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:59:29,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:59:29,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:59:29,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:59:29" (1/3) ... [2020-08-22 22:59:29,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69039837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:29, skipping insertion in model container [2020-08-22 22:59:29,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:29" (2/3) ... [2020-08-22 22:59:29,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69039837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:29, skipping insertion in model container [2020-08-22 22:59:29,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:29" (3/3) ... [2020-08-22 22:59:29,873 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-08-22 22:59:29,891 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:59:29,902 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:59:29,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:59:29,958 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:59:29,958 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:59:29,959 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:59:29,959 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:59:29,959 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:59:29,959 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:59:29,959 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:59:29,960 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:59:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-08-22 22:59:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 22:59:29,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:29,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:29,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-08-22 22:59:30,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:30,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8406229] [2020-08-22 22:59:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:30,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8406229] [2020-08-22 22:59:30,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:30,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:59:30,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75616608] [2020-08-22 22:59:30,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:59:30,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:59:30,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:59:30,276 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-08-22 22:59:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:30,507 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-08-22 22:59:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:59:30,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-22 22:59:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:30,522 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:59:30,523 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:59:30,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:59:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-08-22 22:59:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 22:59:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-08-22 22:59:30,583 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-08-22 22:59:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:30,584 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-08-22 22:59:30,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:59:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-08-22 22:59:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 22:59:30,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:30,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:30,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:59:30,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-08-22 22:59:30,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:30,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430091981] [2020-08-22 22:59:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:30,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430091981] [2020-08-22 22:59:30,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:30,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:59:30,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927744800] [2020-08-22 22:59:30,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:59:30,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:59:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:59:30,909 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-08-22 22:59:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:31,244 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-22 22:59:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:59:31,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-22 22:59:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:31,246 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:59:31,247 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 22:59:31,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:59:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 22:59:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-22 22:59:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 22:59:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-22 22:59:31,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-08-22 22:59:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:31,265 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-22 22:59:31,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:59:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-22 22:59:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 22:59:31,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:31,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:31,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:59:31,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-08-22 22:59:31,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:31,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702271385] [2020-08-22 22:59:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:31,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702271385] [2020-08-22 22:59:31,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:31,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:59:31,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417487721] [2020-08-22 22:59:31,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:59:31,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:59:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:59:31,539 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-08-22 22:59:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:31,865 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-08-22 22:59:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:59:31,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 22:59:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:31,868 INFO L225 Difference]: With dead ends: 87 [2020-08-22 22:59:31,868 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 22:59:31,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:59:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 22:59:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-08-22 22:59:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 22:59:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-08-22 22:59:31,882 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-08-22 22:59:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:31,883 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-08-22 22:59:31,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:59:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-08-22 22:59:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 22:59:31,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:31,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:31,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:59:31,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-08-22 22:59:31,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:31,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912248976] [2020-08-22 22:59:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 22:59:31,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912248976] [2020-08-22 22:59:31,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:31,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:59:31,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341023467] [2020-08-22 22:59:31,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:59:31,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:59:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:31,994 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-08-22 22:59:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:32,166 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-08-22 22:59:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:59:32,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-08-22 22:59:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:32,169 INFO L225 Difference]: With dead ends: 86 [2020-08-22 22:59:32,170 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 22:59:32,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:59:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 22:59:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-08-22 22:59:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 22:59:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-08-22 22:59:32,185 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-08-22 22:59:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:32,185 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-08-22 22:59:32,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:59:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-08-22 22:59:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:59:32,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:32,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:32,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:59:32,188 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash 272366111, now seen corresponding path program 1 times [2020-08-22 22:59:32,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:32,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809799480] [2020-08-22 22:59:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 22:59:32,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809799480] [2020-08-22 22:59:32,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:32,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:59:32,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962389056] [2020-08-22 22:59:32,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:59:32,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:59:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:59:32,305 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-08-22 22:59:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:32,495 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-08-22 22:59:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:59:32,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-08-22 22:59:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:32,497 INFO L225 Difference]: With dead ends: 95 [2020-08-22 22:59:32,497 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 22:59:32,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:59:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 22:59:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-08-22 22:59:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 22:59:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-08-22 22:59:32,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-08-22 22:59:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:32,510 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-08-22 22:59:32,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:59:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-08-22 22:59:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 22:59:32,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:32,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:32,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:59:32,513 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-08-22 22:59:32,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:32,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537354618] [2020-08-22 22:59:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:32,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537354618] [2020-08-22 22:59:32,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:32,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:59:32,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253395130] [2020-08-22 22:59:32,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:59:32,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:59:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:59:32,801 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-08-22 22:59:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:33,152 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-08-22 22:59:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:59:33,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-08-22 22:59:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:33,159 INFO L225 Difference]: With dead ends: 113 [2020-08-22 22:59:33,159 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 22:59:33,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:59:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 22:59:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-22 22:59:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 22:59:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-08-22 22:59:33,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-08-22 22:59:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:33,170 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-08-22 22:59:33,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:59:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-08-22 22:59:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 22:59:33,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:33,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:33,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:59:33,172 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash 809903117, now seen corresponding path program 3 times [2020-08-22 22:59:33,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:33,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954379545] [2020-08-22 22:59:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:33,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:33,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:33,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954379545] [2020-08-22 22:59:33,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:33,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:59:33,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715912164] [2020-08-22 22:59:33,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:59:33,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:59:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:59:33,532 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-08-22 22:59:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:33,961 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-08-22 22:59:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:59:33,961 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 22:59:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:33,963 INFO L225 Difference]: With dead ends: 119 [2020-08-22 22:59:33,963 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 22:59:33,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:59:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 22:59:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-08-22 22:59:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 22:59:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-08-22 22:59:33,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-08-22 22:59:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:33,989 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-08-22 22:59:33,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:59:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-08-22 22:59:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 22:59:33,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:33,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:33,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:59:33,991 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash 577206281, now seen corresponding path program 4 times [2020-08-22 22:59:33,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:33,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345906113] [2020-08-22 22:59:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:34,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345906113] [2020-08-22 22:59:34,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:34,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:59:34,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792035158] [2020-08-22 22:59:34,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:59:34,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:59:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:59:34,457 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-08-22 22:59:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:34,990 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-08-22 22:59:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:59:34,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-08-22 22:59:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:34,992 INFO L225 Difference]: With dead ends: 125 [2020-08-22 22:59:34,992 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 22:59:34,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:59:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 22:59:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-08-22 22:59:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 22:59:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-08-22 22:59:35,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-08-22 22:59:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:35,005 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-08-22 22:59:35,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:59:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-08-22 22:59:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 22:59:35,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:35,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:35,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:59:35,010 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -274669819, now seen corresponding path program 5 times [2020-08-22 22:59:35,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:35,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016774393] [2020-08-22 22:59:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:35,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016774393] [2020-08-22 22:59:35,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:35,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:59:35,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144456222] [2020-08-22 22:59:35,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:59:35,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:59:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:59:35,548 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-08-22 22:59:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:36,104 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-08-22 22:59:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:59:36,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 22:59:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:36,109 INFO L225 Difference]: With dead ends: 131 [2020-08-22 22:59:36,109 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 22:59:36,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:59:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 22:59:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-08-22 22:59:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 22:59:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-08-22 22:59:36,125 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-08-22 22:59:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:36,125 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-08-22 22:59:36,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:59:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-08-22 22:59:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:59:36,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:36,127 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:36,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:59:36,127 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -61335295, now seen corresponding path program 6 times [2020-08-22 22:59:36,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:36,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953270330] [2020-08-22 22:59:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:36,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953270330] [2020-08-22 22:59:36,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:36,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:59:36,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621411845] [2020-08-22 22:59:36,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:59:36,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:59:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:59:36,693 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-08-22 22:59:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:37,442 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-08-22 22:59:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:59:37,443 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-22 22:59:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:37,444 INFO L225 Difference]: With dead ends: 137 [2020-08-22 22:59:37,444 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:59:37,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:59:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:59:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-08-22 22:59:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 22:59:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-08-22 22:59:37,457 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-08-22 22:59:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:37,457 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-08-22 22:59:37,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:59:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-08-22 22:59:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:59:37,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:37,458 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:37,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:59:37,459 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1180506627, now seen corresponding path program 7 times [2020-08-22 22:59:37,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:37,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706939452] [2020-08-22 22:59:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:38,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706939452] [2020-08-22 22:59:38,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:38,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 22:59:38,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523228615] [2020-08-22 22:59:38,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 22:59:38,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 22:59:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:59:38,120 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-08-22 22:59:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:38,916 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-08-22 22:59:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 22:59:38,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-08-22 22:59:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:38,918 INFO L225 Difference]: With dead ends: 143 [2020-08-22 22:59:38,918 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 22:59:38,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 22:59:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 22:59:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-08-22 22:59:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 22:59:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-08-22 22:59:38,929 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-08-22 22:59:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:38,930 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-08-22 22:59:38,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 22:59:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-08-22 22:59:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 22:59:38,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:38,931 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:38,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:59:38,931 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1632044537, now seen corresponding path program 8 times [2020-08-22 22:59:38,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:38,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279702227] [2020-08-22 22:59:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:39,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279702227] [2020-08-22 22:59:39,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:39,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:59:39,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640326770] [2020-08-22 22:59:39,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:59:39,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:59:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:59:39,810 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-08-22 22:59:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:40,716 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-08-22 22:59:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 22:59:40,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-08-22 22:59:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:40,718 INFO L225 Difference]: With dead ends: 149 [2020-08-22 22:59:40,718 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:59:40,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 22:59:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:59:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-08-22 22:59:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 22:59:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-08-22 22:59:40,734 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-08-22 22:59:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:40,734 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-08-22 22:59:40,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:59:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-08-22 22:59:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 22:59:40,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:40,735 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:40,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:59:40,736 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1313195787, now seen corresponding path program 9 times [2020-08-22 22:59:40,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:40,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019012264] [2020-08-22 22:59:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:40,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:41,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019012264] [2020-08-22 22:59:41,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:41,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 22:59:41,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770710317] [2020-08-22 22:59:41,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 22:59:41,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 22:59:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:59:41,594 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-08-22 22:59:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:42,724 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-08-22 22:59:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 22:59:42,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-08-22 22:59:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:42,726 INFO L225 Difference]: With dead ends: 155 [2020-08-22 22:59:42,726 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 22:59:42,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 22:59:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 22:59:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-08-22 22:59:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:59:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-08-22 22:59:42,739 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-08-22 22:59:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:42,740 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-08-22 22:59:42,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 22:59:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-08-22 22:59:42,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 22:59:42,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:42,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:42,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:59:42,741 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:42,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1440596239, now seen corresponding path program 10 times [2020-08-22 22:59:42,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:42,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544032988] [2020-08-22 22:59:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:43,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544032988] [2020-08-22 22:59:43,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:43,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 22:59:43,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436344274] [2020-08-22 22:59:43,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 22:59:43,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 22:59:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:59:43,761 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-08-22 22:59:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:44,855 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-08-22 22:59:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 22:59:44,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-08-22 22:59:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:44,857 INFO L225 Difference]: With dead ends: 161 [2020-08-22 22:59:44,857 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 22:59:44,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 22:59:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 22:59:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-08-22 22:59:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 22:59:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-08-22 22:59:44,871 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-08-22 22:59:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:44,872 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-08-22 22:59:44,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 22:59:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-08-22 22:59:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 22:59:44,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:44,873 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:44,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:59:44,874 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1179965421, now seen corresponding path program 11 times [2020-08-22 22:59:44,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:44,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428985911] [2020-08-22 22:59:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:44,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:45,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428985911] [2020-08-22 22:59:45,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:45,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 22:59:45,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83921181] [2020-08-22 22:59:45,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 22:59:45,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 22:59:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:59:45,925 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-08-22 22:59:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:47,174 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-08-22 22:59:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 22:59:47,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-08-22 22:59:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:47,176 INFO L225 Difference]: With dead ends: 167 [2020-08-22 22:59:47,176 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 22:59:47,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 22:59:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 22:59:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-08-22 22:59:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 22:59:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-08-22 22:59:47,193 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-08-22 22:59:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:47,194 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-08-22 22:59:47,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 22:59:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-08-22 22:59:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 22:59:47,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:47,195 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:47,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:59:47,195 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash 987218921, now seen corresponding path program 12 times [2020-08-22 22:59:47,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:47,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323924633] [2020-08-22 22:59:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:47,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:47,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323924633] [2020-08-22 22:59:48,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:48,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 22:59:48,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762007307] [2020-08-22 22:59:48,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 22:59:48,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 22:59:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:59:48,710 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-08-22 22:59:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:50,000 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-08-22 22:59:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 22:59:50,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-08-22 22:59:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:50,002 INFO L225 Difference]: With dead ends: 173 [2020-08-22 22:59:50,002 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 22:59:50,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 22:59:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 22:59:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-08-22 22:59:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 22:59:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-08-22 22:59:50,021 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-08-22 22:59:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:50,022 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-08-22 22:59:50,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 22:59:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-08-22 22:59:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 22:59:50,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:50,024 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:50,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:59:50,024 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1327447323, now seen corresponding path program 13 times [2020-08-22 22:59:50,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:50,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314503683] [2020-08-22 22:59:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:50,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:51,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314503683] [2020-08-22 22:59:51,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:51,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 22:59:51,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340486871] [2020-08-22 22:59:51,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 22:59:51,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 22:59:51,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 22:59:51,492 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-08-22 22:59:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:53,070 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-08-22 22:59:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 22:59:53,070 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-08-22 22:59:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:53,072 INFO L225 Difference]: With dead ends: 179 [2020-08-22 22:59:53,072 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 22:59:53,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 22:59:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 22:59:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-08-22 22:59:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 22:59:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-08-22 22:59:53,087 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-08-22 22:59:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:53,088 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-08-22 22:59:53,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 22:59:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-08-22 22:59:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 22:59:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:53,089 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:53,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:59:53,090 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 39163105, now seen corresponding path program 14 times [2020-08-22 22:59:53,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:53,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902121206] [2020-08-22 22:59:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:53,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:53,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:54,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902121206] [2020-08-22 22:59:54,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:54,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 22:59:54,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040589447] [2020-08-22 22:59:54,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 22:59:54,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 22:59:54,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:59:54,705 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-08-22 22:59:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:56,403 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-08-22 22:59:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 22:59:56,404 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-08-22 22:59:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:56,406 INFO L225 Difference]: With dead ends: 185 [2020-08-22 22:59:56,406 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 22:59:56,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 22:59:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 22:59:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-08-22 22:59:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 22:59:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-08-22 22:59:56,423 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-08-22 22:59:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:56,423 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-08-22 22:59:56,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 22:59:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-08-22 22:59:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 22:59:56,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:56,425 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:56,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:59:56,425 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1976302045, now seen corresponding path program 15 times [2020-08-22 22:59:56,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:56,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534184290] [2020-08-22 22:59:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:56,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:56,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:58,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534184290] [2020-08-22 22:59:58,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:58,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 22:59:58,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152792258] [2020-08-22 22:59:58,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 22:59:58,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:58,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 22:59:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 22:59:58,099 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-08-22 22:59:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:59,970 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-08-22 22:59:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-22 22:59:59,970 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-08-22 22:59:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:59,972 INFO L225 Difference]: With dead ends: 191 [2020-08-22 22:59:59,972 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 22:59:59,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 22:59:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 22:59:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-08-22 22:59:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 22:59:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-08-22 22:59:59,990 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-08-22 22:59:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:59,990 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-08-22 22:59:59,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 22:59:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-08-22 22:59:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 22:59:59,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:59,992 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:59,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:59:59,992 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash -91639335, now seen corresponding path program 16 times [2020-08-22 22:59:59,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:59,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416752285] [2020-08-22 22:59:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:01,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416752285] [2020-08-22 23:00:01,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:01,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 23:00:01,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564702341] [2020-08-22 23:00:01,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 23:00:01,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 23:00:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:00:01,892 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-08-22 23:00:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:03,918 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-08-22 23:00:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 23:00:03,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-08-22 23:00:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:03,921 INFO L225 Difference]: With dead ends: 197 [2020-08-22 23:00:03,921 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 23:00:03,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:00:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 23:00:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-08-22 23:00:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 23:00:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-08-22 23:00:03,937 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-08-22 23:00:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:03,938 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-08-22 23:00:03,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 23:00:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-08-22 23:00:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 23:00:03,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:03,940 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:03,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:00:03,940 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash -461079339, now seen corresponding path program 17 times [2020-08-22 23:00:03,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:03,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017790677] [2020-08-22 23:00:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:04,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:06,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017790677] [2020-08-22 23:00:06,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:06,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 23:00:06,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505001159] [2020-08-22 23:00:06,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 23:00:06,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 23:00:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:00:06,202 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-08-22 23:00:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:08,499 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-08-22 23:00:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-22 23:00:08,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-08-22 23:00:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:08,501 INFO L225 Difference]: With dead ends: 203 [2020-08-22 23:00:08,502 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 23:00:08,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:00:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 23:00:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-08-22 23:00:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:00:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-08-22 23:00:08,527 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-08-22 23:00:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:08,527 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-08-22 23:00:08,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 23:00:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-08-22 23:00:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 23:00:08,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:08,529 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:08,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:00:08,530 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1469965615, now seen corresponding path program 18 times [2020-08-22 23:00:08,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:08,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707432078] [2020-08-22 23:00:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:08,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:08,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:10,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707432078] [2020-08-22 23:00:10,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:10,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 23:00:10,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392760193] [2020-08-22 23:00:10,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 23:00:10,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 23:00:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:00:10,793 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-08-22 23:00:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:13,387 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-08-22 23:00:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 23:00:13,390 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-08-22 23:00:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:13,391 INFO L225 Difference]: With dead ends: 209 [2020-08-22 23:00:13,391 INFO L226 Difference]: Without dead ends: 172 [2020-08-22 23:00:13,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:00:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-22 23:00:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-08-22 23:00:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 23:00:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-08-22 23:00:13,409 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-08-22 23:00:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:13,409 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-08-22 23:00:13,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 23:00:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-08-22 23:00:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-22 23:00:13,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:13,411 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:13,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:00:13,411 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1753723955, now seen corresponding path program 19 times [2020-08-22 23:00:13,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:13,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708428338] [2020-08-22 23:00:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:13,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:13,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:15,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708428338] [2020-08-22 23:00:15,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:15,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 23:00:15,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371661935] [2020-08-22 23:00:15,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 23:00:15,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 23:00:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:00:15,802 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-08-22 23:00:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:18,383 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-08-22 23:00:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-08-22 23:00:18,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-08-22 23:00:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:18,385 INFO L225 Difference]: With dead ends: 215 [2020-08-22 23:00:18,386 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 23:00:18,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:00:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 23:00:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-08-22 23:00:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 23:00:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-08-22 23:00:18,409 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-08-22 23:00:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:18,410 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-08-22 23:00:18,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 23:00:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-08-22 23:00:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 23:00:18,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:18,411 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:18,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:00:18,412 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1681076279, now seen corresponding path program 20 times [2020-08-22 23:00:18,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:18,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624070390] [2020-08-22 23:00:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624070390] [2020-08-22 23:00:21,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:21,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 23:00:21,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095993914] [2020-08-22 23:00:21,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 23:00:21,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 23:00:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:00:21,158 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-08-22 23:00:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:24,251 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-08-22 23:00:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 23:00:24,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-08-22 23:00:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:24,254 INFO L225 Difference]: With dead ends: 221 [2020-08-22 23:00:24,254 INFO L226 Difference]: Without dead ends: 184 [2020-08-22 23:00:24,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:00:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-22 23:00:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-08-22 23:00:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 23:00:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-08-22 23:00:24,274 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-08-22 23:00:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:24,274 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-08-22 23:00:24,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 23:00:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-08-22 23:00:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 23:00:24,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:24,276 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:24,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:00:24,276 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash -199924027, now seen corresponding path program 21 times [2020-08-22 23:00:24,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:24,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477008381] [2020-08-22 23:00:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:24,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:27,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477008381] [2020-08-22 23:00:27,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:27,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 23:00:27,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710283048] [2020-08-22 23:00:27,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 23:00:27,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 23:00:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:00:27,132 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-08-22 23:00:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:30,259 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-08-22 23:00:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-08-22 23:00:30,259 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-08-22 23:00:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:30,261 INFO L225 Difference]: With dead ends: 227 [2020-08-22 23:00:30,262 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 23:00:30,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:00:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 23:00:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-08-22 23:00:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 23:00:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-08-22 23:00:30,285 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-08-22 23:00:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:30,285 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-08-22 23:00:30,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 23:00:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-08-22 23:00:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 23:00:30,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:30,286 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:30,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:00:30,287 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash -273166143, now seen corresponding path program 22 times [2020-08-22 23:00:30,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:30,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709077823] [2020-08-22 23:00:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:30,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:33,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709077823] [2020-08-22 23:00:33,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:33,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 23:00:33,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877051404] [2020-08-22 23:00:33,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 23:00:33,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 23:00:33,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:00:33,519 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-08-22 23:00:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:36,839 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-08-22 23:00:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 23:00:36,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-08-22 23:00:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:36,842 INFO L225 Difference]: With dead ends: 233 [2020-08-22 23:00:36,842 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 23:00:36,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:00:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 23:00:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-08-22 23:00:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 23:00:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-08-22 23:00:36,869 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-08-22 23:00:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:36,870 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-08-22 23:00:36,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 23:00:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-08-22 23:00:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 23:00:36,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:36,872 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:36,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:00:36,873 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1429615171, now seen corresponding path program 23 times [2020-08-22 23:00:36,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:36,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113740655] [2020-08-22 23:00:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:36,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:36,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:40,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113740655] [2020-08-22 23:00:40,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:40,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 23:00:40,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710927576] [2020-08-22 23:00:40,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 23:00:40,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 23:00:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:00:40,149 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-08-22 23:00:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:43,748 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-08-22 23:00:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-08-22 23:00:43,749 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-08-22 23:00:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:43,751 INFO L225 Difference]: With dead ends: 239 [2020-08-22 23:00:43,751 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 23:00:43,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:00:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 23:00:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-08-22 23:00:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 23:00:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-08-22 23:00:43,773 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-08-22 23:00:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:43,773 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-08-22 23:00:43,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 23:00:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-08-22 23:00:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-08-22 23:00:43,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:43,775 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:43,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:00:43,775 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash -904847943, now seen corresponding path program 24 times [2020-08-22 23:00:43,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:43,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227934254] [2020-08-22 23:00:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:43,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:47,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227934254] [2020-08-22 23:00:47,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:47,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 23:00:47,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042139348] [2020-08-22 23:00:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 23:00:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 23:00:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:00:47,359 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-08-22 23:00:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:51,216 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-08-22 23:00:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 23:00:51,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-08-22 23:00:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:51,224 INFO L225 Difference]: With dead ends: 245 [2020-08-22 23:00:51,224 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 23:00:51,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 23:00:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 23:00:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-08-22 23:00:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:00:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-08-22 23:00:51,254 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-08-22 23:00:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:51,255 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-08-22 23:00:51,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 23:00:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-08-22 23:00:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 23:00:51,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:51,257 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:51,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:00:51,257 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash 922976437, now seen corresponding path program 25 times [2020-08-22 23:00:51,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:51,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664911570] [2020-08-22 23:00:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:51,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:51,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:55,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664911570] [2020-08-22 23:00:55,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:55,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 23:00:55,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609738937] [2020-08-22 23:00:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 23:00:55,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 23:00:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:00:55,152 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-08-22 23:00:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:59,375 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-08-22 23:00:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-08-22 23:00:59,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-08-22 23:00:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:59,378 INFO L225 Difference]: With dead ends: 251 [2020-08-22 23:00:59,378 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 23:00:59,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-08-22 23:00:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 23:00:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-08-22 23:00:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 23:00:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-08-22 23:00:59,410 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-08-22 23:00:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:59,410 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-08-22 23:00:59,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 23:00:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-08-22 23:00:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-22 23:00:59,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:59,412 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:59,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:00:59,412 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -607734095, now seen corresponding path program 26 times [2020-08-22 23:00:59,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:59,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720250219] [2020-08-22 23:00:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:59,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:59,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:03,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720250219] [2020-08-22 23:01:03,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:03,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 23:01:03,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322509304] [2020-08-22 23:01:03,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 23:01:03,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:03,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 23:01:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 23:01:03,681 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-08-22 23:01:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:08,299 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-08-22 23:01:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 23:01:08,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-08-22 23:01:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:08,302 INFO L225 Difference]: With dead ends: 257 [2020-08-22 23:01:08,302 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 23:01:08,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-08-22 23:01:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 23:01:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-08-22 23:01:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 23:01:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-08-22 23:01:08,338 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-08-22 23:01:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:08,338 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-08-22 23:01:08,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 23:01:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-08-22 23:01:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 23:01:08,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:08,340 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:08,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:01:08,340 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1597013933, now seen corresponding path program 27 times [2020-08-22 23:01:08,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:08,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056197500] [2020-08-22 23:01:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:08,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:08,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:12,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056197500] [2020-08-22 23:01:12,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:12,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 23:01:12,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293728150] [2020-08-22 23:01:12,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 23:01:12,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 23:01:12,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:01:12,939 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-08-22 23:01:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:17,959 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-08-22 23:01:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-08-22 23:01:17,960 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-08-22 23:01:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:17,962 INFO L225 Difference]: With dead ends: 263 [2020-08-22 23:01:17,962 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 23:01:17,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-08-22 23:01:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 23:01:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-08-22 23:01:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:01:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-08-22 23:01:17,993 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-08-22 23:01:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:17,994 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-08-22 23:01:17,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 23:01:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-08-22 23:01:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-08-22 23:01:17,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:17,995 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:17,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:01:17,996 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash -523854935, now seen corresponding path program 28 times [2020-08-22 23:01:17,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:17,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780773157] [2020-08-22 23:01:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:18,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:18,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:22,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780773157] [2020-08-22 23:01:22,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:22,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-08-22 23:01:22,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412886698] [2020-08-22 23:01:22,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-08-22 23:01:22,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-08-22 23:01:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:01:22,927 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-08-22 23:01:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:28,258 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-08-22 23:01:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 23:01:28,259 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-08-22 23:01:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:28,261 INFO L225 Difference]: With dead ends: 269 [2020-08-22 23:01:28,262 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 23:01:28,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-08-22 23:01:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 23:01:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-08-22 23:01:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-08-22 23:01:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-08-22 23:01:28,296 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-08-22 23:01:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:28,296 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-08-22 23:01:28,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-08-22 23:01:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-08-22 23:01:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-08-22 23:01:28,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:28,298 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:28,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:01:28,298 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1262564699, now seen corresponding path program 29 times [2020-08-22 23:01:28,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:28,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881217185] [2020-08-22 23:01:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:33,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881217185] [2020-08-22 23:01:33,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:33,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-08-22 23:01:33,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255473825] [2020-08-22 23:01:33,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 23:01:33,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 23:01:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:01:33,793 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-08-22 23:01:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:39,534 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-08-22 23:01:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-08-22 23:01:39,534 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-08-22 23:01:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:39,536 INFO L225 Difference]: With dead ends: 275 [2020-08-22 23:01:39,536 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 23:01:39,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-08-22 23:01:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 23:01:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-08-22 23:01:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 23:01:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-08-22 23:01:39,573 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-08-22 23:01:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:39,573 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-08-22 23:01:39,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 23:01:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-08-22 23:01:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-08-22 23:01:39,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:39,574 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:39,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:01:39,575 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash 536792225, now seen corresponding path program 30 times [2020-08-22 23:01:39,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:39,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456432290] [2020-08-22 23:01:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:39,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:39,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:45,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456432290] [2020-08-22 23:01:45,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:45,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-08-22 23:01:45,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585412884] [2020-08-22 23:01:45,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-08-22 23:01:45,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:45,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-08-22 23:01:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:01:45,358 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-08-22 23:01:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:51,522 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-08-22 23:01:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 23:01:51,523 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-08-22 23:01:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:51,525 INFO L225 Difference]: With dead ends: 281 [2020-08-22 23:01:51,525 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 23:01:51,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-08-22 23:01:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 23:01:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-08-22 23:01:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 23:01:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-08-22 23:01:51,557 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-08-22 23:01:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:51,557 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-08-22 23:01:51,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-08-22 23:01:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-08-22 23:01:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-22 23:01:51,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:51,559 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:51,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:01:51,559 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 337404317, now seen corresponding path program 31 times [2020-08-22 23:01:51,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:51,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723402945] [2020-08-22 23:01:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:51,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:51,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:57,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723402945] [2020-08-22 23:01:57,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:57,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-08-22 23:01:57,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178298546] [2020-08-22 23:01:57,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 23:01:57,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 23:01:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:01:57,712 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-08-22 23:02:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:04,357 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-08-22 23:02:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-08-22 23:02:04,358 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-08-22 23:02:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:04,360 INFO L225 Difference]: With dead ends: 287 [2020-08-22 23:02:04,360 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 23:02:04,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-08-22 23:02:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 23:02:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-08-22 23:02:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 23:02:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-08-22 23:02:04,390 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-08-22 23:02:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:04,390 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-08-22 23:02:04,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 23:02:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-08-22 23:02:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-08-22 23:02:04,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:04,392 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:04,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:02:04,392 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash -346207847, now seen corresponding path program 32 times [2020-08-22 23:02:04,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:04,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474709613] [2020-08-22 23:02:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:11,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474709613] [2020-08-22 23:02:11,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:11,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-08-22 23:02:11,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309823887] [2020-08-22 23:02:11,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-08-22 23:02:11,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:11,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-08-22 23:02:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:02:11,089 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-08-22 23:02:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:18,306 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-08-22 23:02:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 23:02:18,307 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-08-22 23:02:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:18,309 INFO L225 Difference]: With dead ends: 293 [2020-08-22 23:02:18,309 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 23:02:18,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-08-22 23:02:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 23:02:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-08-22 23:02:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 23:02:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-08-22 23:02:18,352 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-08-22 23:02:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:18,352 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-08-22 23:02:18,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-08-22 23:02:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-08-22 23:02:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 23:02:18,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:18,354 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:18,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:02:18,354 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash 615990421, now seen corresponding path program 33 times [2020-08-22 23:02:18,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:18,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371495054] [2020-08-22 23:02:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:18,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:25,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371495054] [2020-08-22 23:02:25,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:25,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-08-22 23:02:25,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707846108] [2020-08-22 23:02:25,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 23:02:25,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 23:02:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:02:25,106 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-08-22 23:02:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:32,281 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-08-22 23:02:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-08-22 23:02:32,282 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-08-22 23:02:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:32,285 INFO L225 Difference]: With dead ends: 299 [2020-08-22 23:02:32,285 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 23:02:32,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-08-22 23:02:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 23:02:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-08-22 23:02:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 23:02:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-08-22 23:02:32,331 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-08-22 23:02:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:32,332 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-08-22 23:02:32,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 23:02:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-08-22 23:02:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-22 23:02:32,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:32,334 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:32,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:02:32,334 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:32,335 INFO L82 PathProgramCache]: Analyzing trace with hash 533729937, now seen corresponding path program 34 times [2020-08-22 23:02:32,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:32,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705014570] [2020-08-22 23:02:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:32,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:32,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:39,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705014570] [2020-08-22 23:02:39,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:39,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-08-22 23:02:39,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612542119] [2020-08-22 23:02:39,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-08-22 23:02:39,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-08-22 23:02:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:02:39,465 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-08-22 23:02:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:47,226 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-08-22 23:02:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-08-22 23:02:47,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-08-22 23:02:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:47,229 INFO L225 Difference]: With dead ends: 305 [2020-08-22 23:02:47,229 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 23:02:47,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-08-22 23:02:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 23:02:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-08-22 23:02:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 23:02:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-08-22 23:02:47,282 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-08-22 23:02:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:47,283 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-08-22 23:02:47,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-08-22 23:02:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-08-22 23:02:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-08-22 23:02:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:47,285 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:47,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:02:47,285 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash -654478451, now seen corresponding path program 35 times [2020-08-22 23:02:47,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:47,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562650461] [2020-08-22 23:02:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:47,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:55,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562650461] [2020-08-22 23:02:55,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:55,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-08-22 23:02:55,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739199190] [2020-08-22 23:02:55,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 23:02:55,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 23:02:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:02:55,009 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-08-22 23:03:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:03,317 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-08-22 23:03:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-08-22 23:03:03,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-08-22 23:03:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:03,320 INFO L225 Difference]: With dead ends: 311 [2020-08-22 23:03:03,320 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 23:03:03,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-08-22 23:03:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 23:03:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-08-22 23:03:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-22 23:03:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-08-22 23:03:03,370 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-08-22 23:03:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:03,370 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-08-22 23:03:03,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 23:03:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-08-22 23:03:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-08-22 23:03:03,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:03,372 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:03,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:03:03,373 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1522194551, now seen corresponding path program 36 times [2020-08-22 23:03:03,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:03,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560319559] [2020-08-22 23:03:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:03,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:11,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560319559] [2020-08-22 23:03:11,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:11,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-08-22 23:03:11,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898616062] [2020-08-22 23:03:11,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-08-22 23:03:11,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-08-22 23:03:11,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:03:11,941 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-08-22 23:03:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:21,078 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-08-22 23:03:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-08-22 23:03:21,081 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-08-22 23:03:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:21,082 INFO L225 Difference]: With dead ends: 317 [2020-08-22 23:03:21,082 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 23:03:21,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-08-22 23:03:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 23:03:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-08-22 23:03:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 23:03:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-08-22 23:03:21,127 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-08-22 23:03:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:21,127 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-08-22 23:03:21,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-08-22 23:03:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-08-22 23:03:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-22 23:03:21,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:21,129 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:21,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:03:21,129 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash -295899515, now seen corresponding path program 37 times [2020-08-22 23:03:21,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:21,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737955237] [2020-08-22 23:03:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:21,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:21,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:30,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737955237] [2020-08-22 23:03:30,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:30,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-08-22 23:03:30,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667789954] [2020-08-22 23:03:30,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 23:03:30,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 23:03:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:03:30,670 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-08-22 23:03:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:40,608 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-08-22 23:03:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-08-22 23:03:40,609 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-08-22 23:03:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:40,611 INFO L225 Difference]: With dead ends: 323 [2020-08-22 23:03:40,611 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 23:03:40,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-08-22 23:03:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 23:03:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-08-22 23:03:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-22 23:03:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-08-22 23:03:40,659 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-08-22 23:03:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:40,659 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-08-22 23:03:40,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 23:03:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-08-22 23:03:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-08-22 23:03:40,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:40,662 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:40,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:03:40,662 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:40,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:40,662 INFO L82 PathProgramCache]: Analyzing trace with hash -290813823, now seen corresponding path program 38 times [2020-08-22 23:03:40,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:40,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147135824] [2020-08-22 23:03:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:40,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:40,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:50,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147135824] [2020-08-22 23:03:50,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:50,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-08-22 23:03:50,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879644820] [2020-08-22 23:03:50,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-08-22 23:03:50,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-08-22 23:03:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:03:50,851 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-08-22 23:04:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:02,410 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-08-22 23:04:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-08-22 23:04:02,412 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-08-22 23:04:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:02,414 INFO L225 Difference]: With dead ends: 329 [2020-08-22 23:04:02,414 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 23:04:02,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-08-22 23:04:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 23:04:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-08-22 23:04:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-08-22 23:04:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-08-22 23:04:02,462 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-08-22 23:04:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:02,462 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-08-22 23:04:02,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-08-22 23:04:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-08-22 23:04:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-08-22 23:04:02,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:02,464 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:02,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:04:02,465 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1833153917, now seen corresponding path program 39 times [2020-08-22 23:04:02,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:02,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791250529] [2020-08-22 23:04:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:02,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:04:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:04:13,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791250529] [2020-08-22 23:04:13,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:13,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-08-22 23:04:13,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145253351] [2020-08-22 23:04:13,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 23:04:13,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 23:04:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:04:13,799 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-08-22 23:04:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:26,370 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-08-22 23:04:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-08-22 23:04:26,371 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-08-22 23:04:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:26,374 INFO L225 Difference]: With dead ends: 335 [2020-08-22 23:04:26,374 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 23:04:26,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 23:04:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 23:04:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-08-22 23:04:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 23:04:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-08-22 23:04:26,432 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-08-22 23:04:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:26,433 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-08-22 23:04:26,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 23:04:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-08-22 23:04:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-08-22 23:04:26,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:26,435 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:26,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:04:26,435 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2045654393, now seen corresponding path program 40 times [2020-08-22 23:04:26,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:26,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318614975] [2020-08-22 23:04:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:04:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:04:39,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318614975] [2020-08-22 23:04:39,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:39,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-08-22 23:04:39,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604634779] [2020-08-22 23:04:39,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-08-22 23:04:39,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-08-22 23:04:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:04:39,607 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-08-22 23:04:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:54,861 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-08-22 23:04:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-08-22 23:04:54,863 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-08-22 23:04:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:54,865 INFO L225 Difference]: With dead ends: 341 [2020-08-22 23:04:54,865 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 23:04:54,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-08-22 23:04:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 23:04:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-08-22 23:04:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-08-22 23:04:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-08-22 23:04:54,916 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-08-22 23:04:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:54,916 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-08-22 23:04:54,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-08-22 23:04:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-08-22 23:04:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-08-22 23:04:54,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:54,919 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:54,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:04:54,919 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 689948789, now seen corresponding path program 41 times [2020-08-22 23:04:54,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:54,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226896201] [2020-08-22 23:04:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:55,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:04:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:05:10,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226896201] [2020-08-22 23:05:10,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:10,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-08-22 23:05:10,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468142196] [2020-08-22 23:05:10,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 23:05:10,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 23:05:10,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:05:10,189 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-08-22 23:05:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:27,828 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-08-22 23:05:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-08-22 23:05:27,830 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-08-22 23:05:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:27,832 INFO L225 Difference]: With dead ends: 347 [2020-08-22 23:05:27,832 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 23:05:27,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-08-22 23:05:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 23:05:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-08-22 23:05:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 23:05:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-08-22 23:05:27,914 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-08-22 23:05:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:27,915 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-08-22 23:05:27,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 23:05:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-08-22 23:05:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-08-22 23:05:27,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:27,919 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:27,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:05:27,919 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1342058097, now seen corresponding path program 42 times [2020-08-22 23:05:27,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:27,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610375242] [2020-08-22 23:05:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:05:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:05:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610375242] [2020-08-22 23:05:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-08-22 23:05:45,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511211178] [2020-08-22 23:05:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-08-22 23:05:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:45,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-08-22 23:05:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:05:45,239 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-08-22 23:06:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:03,929 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-08-22 23:06:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-08-22 23:06:03,931 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-08-22 23:06:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:03,932 INFO L225 Difference]: With dead ends: 353 [2020-08-22 23:06:03,933 INFO L226 Difference]: Without dead ends: 316 [2020-08-22 23:06:03,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-08-22 23:06:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-08-22 23:06:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-08-22 23:06:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 23:06:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-08-22 23:06:04,002 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-08-22 23:06:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:04,003 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-08-22 23:06:04,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-08-22 23:06:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-08-22 23:06:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-08-22 23:06:04,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:04,005 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:04,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:06:04,006 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:04,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1079977837, now seen corresponding path program 43 times [2020-08-22 23:06:04,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:04,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826204130] [2020-08-22 23:06:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:06:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:06:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826204130] [2020-08-22 23:06:24,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:24,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-08-22 23:06:24,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292275663] [2020-08-22 23:06:24,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 23:06:24,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:24,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 23:06:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:06:24,082 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-08-22 23:06:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:47,115 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-08-22 23:06:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-08-22 23:06:47,117 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-08-22 23:06:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:47,119 INFO L225 Difference]: With dead ends: 359 [2020-08-22 23:06:47,119 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 23:06:47,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-08-22 23:06:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 23:06:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-08-22 23:06:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-08-22 23:06:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-08-22 23:06:47,192 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-08-22 23:06:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:47,193 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-08-22 23:06:47,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 23:06:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-08-22 23:06:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-08-22 23:06:47,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:47,196 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:47,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:06:47,196 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2067238039, now seen corresponding path program 44 times [2020-08-22 23:06:47,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:47,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288228138] [2020-08-22 23:06:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:47,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:47,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:06:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:07:10,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288228138] [2020-08-22 23:07:10,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:10,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-08-22 23:07:10,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560269769] [2020-08-22 23:07:10,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-08-22 23:07:10,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-08-22 23:07:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:07:10,854 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-08-22 23:07:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:37,206 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-08-22 23:07:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-08-22 23:07:37,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-08-22 23:07:37,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:37,212 INFO L225 Difference]: With dead ends: 365 [2020-08-22 23:07:37,212 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 23:07:37,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-08-22 23:07:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 23:07:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-08-22 23:07:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 23:07:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-08-22 23:07:37,267 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-08-22 23:07:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:37,268 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-08-22 23:07:37,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-08-22 23:07:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-08-22 23:07:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-08-22 23:07:37,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:37,271 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:37,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:07:37,271 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1670393243, now seen corresponding path program 45 times [2020-08-22 23:07:37,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:37,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725931349] [2020-08-22 23:07:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:37,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:37,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:07:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:47,235 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:08:05,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725931349] [2020-08-22 23:08:05,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:05,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-08-22 23:08:05,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744313283] [2020-08-22 23:08:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 23:08:05,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 23:08:05,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:08:05,704 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-08-22 23:08:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:38,020 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-08-22 23:08:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-08-22 23:08:38,024 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-08-22 23:08:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:38,026 INFO L225 Difference]: With dead ends: 371 [2020-08-22 23:08:38,026 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 23:08:38,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-08-22 23:08:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 23:08:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-08-22 23:08:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-08-22 23:08:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-08-22 23:08:38,088 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-08-22 23:08:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:38,088 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-08-22 23:08:38,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 23:08:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-08-22 23:08:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-08-22 23:08:38,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:38,091 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:38,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:08:38,091 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1220869023, now seen corresponding path program 46 times [2020-08-22 23:08:38,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:38,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577100107] [2020-08-22 23:08:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:38,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:08:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:41,796 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:42,017 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:42,258 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:46,986 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:54,090 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:55,384 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:56,729 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:57,133 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:57,612 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:58,571 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:00,039 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:01,053 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:01,576 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:04,775 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:06,435 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:07,004 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:08,135 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:08,716 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:09,298 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:09,903 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:10,499 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:12,308 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:09:12,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577100107] [2020-08-22 23:09:12,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:12,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-08-22 23:09:12,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37211253] [2020-08-22 23:09:12,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-08-22 23:09:12,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-08-22 23:09:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:09:12,811 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-08-22 23:09:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:49,205 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-08-22 23:09:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-08-22 23:09:49,209 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-08-22 23:09:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:49,211 INFO L225 Difference]: With dead ends: 377 [2020-08-22 23:09:49,212 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 23:09:49,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-08-22 23:09:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 23:09:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-08-22 23:09:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-22 23:09:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-08-22 23:09:49,270 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-08-22 23:09:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:49,270 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-08-22 23:09:49,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-08-22 23:09:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-08-22 23:09:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-08-22 23:09:49,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:49,273 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:49,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:09:49,274 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1908394333, now seen corresponding path program 47 times [2020-08-22 23:09:49,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:49,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637828562] [2020-08-22 23:09:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:49,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:49,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:09:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:49,737 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:49,884 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,042 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,198 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,364 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,533 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,710 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:50,887 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:51,077 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:51,268 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:51,467 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:51,672 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:51,885 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:52,101 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:52,319 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:52,550 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:52,786 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:53,025 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:53,272 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:53,521 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:53,778 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:54,043 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:54,313 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:54,584 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:54,874 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:55,155 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:55,442 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:55,748 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:56,084 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:56,398 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:56,712 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:57,035 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:57,362 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:57,697 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:58,039 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:58,386 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:58,741 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:59,098 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:59,469 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:59,841 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:00,224 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:00,595 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:00,989 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:01,395 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:01,807 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:02,251 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:02,673 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:03,127 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:03,560 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:04,028 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:04,493 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:04,944 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:05,368 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:05,844 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:06,351 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:06,866 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:07,366 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:07,910 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:08,413 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:08,913 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:09,421 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:09,953 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:10,490 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:11,013 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:11,545 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:12,074 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:12,616 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:13,154 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:13,703 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:14,257 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:14,824 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:15,400 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:15,979 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:16,564 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,163 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,775 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,390 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,998 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:19,616 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,238 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,870 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:21,510 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:22,155 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:22,808 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:23,467 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:24,070 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:24,780 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:25,459 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:26,160 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:26,851 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:27,542 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:28,241 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:28,947 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:29,652 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:30,368 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:10:30,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637828562] [2020-08-22 23:10:30,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:30,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-08-22 23:10:30,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706445516] [2020-08-22 23:10:30,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 23:10:30,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 23:10:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:10:30,884 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 101 states. [2020-08-22 23:10:32,384 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-08-22 23:11:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:13,523 INFO L93 Difference]: Finished difference Result 383 states and 393 transitions. [2020-08-22 23:11:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-08-22 23:11:13,528 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 325 [2020-08-22 23:11:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:13,531 INFO L225 Difference]: With dead ends: 383 [2020-08-22 23:11:13,531 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 23:11:13,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 79.9s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-08-22 23:11:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 23:11:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-08-22 23:11:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-08-22 23:11:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-08-22 23:11:13,593 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-08-22 23:11:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:13,593 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-08-22 23:11:13,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 23:11:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-08-22 23:11:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-08-22 23:11:13,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:13,596 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:13,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:11:13,596 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1857822375, now seen corresponding path program 48 times [2020-08-22 23:11:13,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:13,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010564076] [2020-08-22 23:11:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:11:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:14,098 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:14,270 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:14,447 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:14,629 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:14,816 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:15,013 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:15,215 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:15,425 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:15,644 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:15,865 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:16,094 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:16,327 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:16,572 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:16,827 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:17,086 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:17,348 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:17,617 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:17,891 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:18,172 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:18,459 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:18,755 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:19,048 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:19,360 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:19,675 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:19,993 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:20,336 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:20,667 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:21,004 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:21,345 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:21,724 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:22,090 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:22,454 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:22,828 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:23,208 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:23,597 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:23,993 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:24,390 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:24,798 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:25,215 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:25,634 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:26,062 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:26,494 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:26,933 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:27,386 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:27,850 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:28,314 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:28,798 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:29,275 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:29,758 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:30,262 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:30,769 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:31,277 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:31,797 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:32,326 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:32,861 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:33,405 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:33,954 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:34,511 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:35,082 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:35,648 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:36,231 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:36,816 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:37,416 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:38,022 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:38,624 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:39,260 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:39,884 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:40,511 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:41,147 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:41,786 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:42,443 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:43,103 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:43,770 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:44,438 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:45,119 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:45,802 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:46,438 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:47,157 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:47,893 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:48,630 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:49,377 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:50,114 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:50,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:51,619 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:52,385 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:53,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:53,934 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:54,706 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:55,504 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:56,304 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:57,131 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:57,956 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:58,790 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:59,627 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:00,468 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:01,315 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:02,178 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6825 backedges. 0 proven. 6816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:12:02,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010564076] [2020-08-22 23:12:02,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:02,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-08-22 23:12:02,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633479769] [2020-08-22 23:12:02,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-08-22 23:12:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-08-22 23:12:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2604, Invalid=7902, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:12:02,753 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 103 states. [2020-08-22 23:12:04,509 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-08-22 23:12:40,751 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16