/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:43:17,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:43:17,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:43:17,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:43:17,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:43:17,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:43:17,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:43:17,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:43:17,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:43:17,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:43:17,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:43:17,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:43:17,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:43:17,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:43:17,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:43:17,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:43:17,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:43:17,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:43:17,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:43:17,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:43:17,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:43:17,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:43:17,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:43:17,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:43:17,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:43:17,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:43:17,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:43:17,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:43:17,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:43:17,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:43:17,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:43:17,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:43:17,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:43:17,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:43:17,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:43:17,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:43:17,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:43:17,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:43:17,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:43:17,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:43:17,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:43:17,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:43:17,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:43:17,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:43:17,804 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:43:17,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:43:17,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:43:17,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:17,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:43:17,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:43:17,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:43:17,805 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:43:18,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:43:18,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:43:18,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:43:18,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:43:18,310 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:43:18,311 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-04 17:43:18,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a01697b26/3de536a48e4d4bd0827498e96db821a1/FLAG5695fa219 [2020-09-04 17:43:18,958 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:43:18,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-04 17:43:18,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a01697b26/3de536a48e4d4bd0827498e96db821a1/FLAG5695fa219 [2020-09-04 17:43:19,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a01697b26/3de536a48e4d4bd0827498e96db821a1 [2020-09-04 17:43:19,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:43:19,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:43:19,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:19,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:43:19,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:43:19,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c3ff97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19, skipping insertion in model container [2020-09-04 17:43:19,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:43:19,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:43:19,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:19,611 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:43:19,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:19,658 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:43:19,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19 WrapperNode [2020-09-04 17:43:19,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:19,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:43:19,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:43:19,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:43:19,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... [2020-09-04 17:43:19,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:43:19,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:43:19,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:43:19,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:43:19,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:19,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:43:19,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:43:19,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:43:19,888 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-04 17:43:19,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:43:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:43:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:43:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:43:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-04 17:43:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 17:43:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:43:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 17:43:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:43:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:43:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 17:43:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:43:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:43:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:43:20,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:43:20,223 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:43:20,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:20 BoogieIcfgContainer [2020-09-04 17:43:20,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:43:20,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:43:20,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:43:20,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:43:20,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:43:19" (1/3) ... [2020-09-04 17:43:20,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f61139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:20, skipping insertion in model container [2020-09-04 17:43:20,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:19" (2/3) ... [2020-09-04 17:43:20,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f61139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:20, skipping insertion in model container [2020-09-04 17:43:20,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:20" (3/3) ... [2020-09-04 17:43:20,243 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-04 17:43:20,259 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:43:20,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:43:20,300 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:43:20,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:43:20,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:43:20,341 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:43:20,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:43:20,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:43:20,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:43:20,342 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:43:20,342 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:43:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-04 17:43:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:43:20,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:20,391 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] [2020-09-04 17:43:20,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-04 17:43:20,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:20,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068925283] [2020-09-04 17:43:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:20,488 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:20,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068925283] [2020-09-04 17:43:20,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:20,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:43:20,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236153246] [2020-09-04 17:43:20,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:43:20,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:43:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:43:20,733 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-04 17:43:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:20,984 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-04 17:43:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:43:20,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-04 17:43:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:21,002 INFO L225 Difference]: With dead ends: 94 [2020-09-04 17:43:21,002 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 17:43:21,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 17:43:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-04 17:43:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 17:43:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-04 17:43:21,071 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-04 17:43:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:21,072 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-04 17:43:21,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:43:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-04 17:43:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:43:21,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:21,074 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] [2020-09-04 17:43:21,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:43:21,075 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:21,076 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-04 17:43:21,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:21,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189039374] [2020-09-04 17:43:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:21,080 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:21,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189039374] [2020-09-04 17:43:21,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:21,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:43:21,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151316294] [2020-09-04 17:43:21,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:43:21,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:43:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:21,333 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-04 17:43:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:21,656 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-04 17:43:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:43:21,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-04 17:43:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:21,658 INFO L225 Difference]: With dead ends: 81 [2020-09-04 17:43:21,659 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 17:43:21,661 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 [2020-09-04 17:43:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 17:43:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-04 17:43:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 17:43:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-04 17:43:21,676 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-04 17:43:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:21,676 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-04 17:43:21,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:43:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-04 17:43:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:43:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:21,678 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] [2020-09-04 17:43:21,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:43:21,679 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-09-04 17:43:21,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:21,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211463749] [2020-09-04 17:43:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:21,709 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:21,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211463749] [2020-09-04 17:43:21,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:21,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:43:21,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091617899] [2020-09-04 17:43:21,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:43:21,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:21,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:43:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:43:21,988 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-04 17:43:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:22,318 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-04 17:43:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:43:22,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-04 17:43:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:22,321 INFO L225 Difference]: With dead ends: 87 [2020-09-04 17:43:22,321 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 17:43:22,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:43:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 17:43:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-04 17:43:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 17:43:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-04 17:43:22,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-04 17:43:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:22,337 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-04 17:43:22,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:43:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-04 17:43:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:43:22,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:22,339 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] [2020-09-04 17:43:22,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:43:22,340 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-09-04 17:43:22,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:22,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067442182] [2020-09-04 17:43:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:22,357 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:22,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067442182] [2020-09-04 17:43:22,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:22,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:43:22,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982111877] [2020-09-04 17:43:22,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:43:22,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:43:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:22,460 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-09-04 17:43:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:22,662 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-09-04 17:43:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:43:22,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-04 17:43:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:22,667 INFO L225 Difference]: With dead ends: 86 [2020-09-04 17:43:22,667 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 17:43:22,668 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 [2020-09-04 17:43:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 17:43:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-09-04 17:43:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 17:43:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-09-04 17:43:22,686 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-09-04 17:43:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:22,687 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-09-04 17:43:22,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:43:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-09-04 17:43:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 17:43:22,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:22,689 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] [2020-09-04 17:43:22,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:43:22,689 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash -632447720, now seen corresponding path program 1 times [2020-09-04 17:43:22,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:22,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958482432] [2020-09-04 17:43:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:22,697 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:22,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958482432] [2020-09-04 17:43:22,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:22,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:43:22,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639900533] [2020-09-04 17:43:22,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:43:22,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:43:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:22,809 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-09-04 17:43:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:23,006 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-09-04 17:43:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:43:23,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-09-04 17:43:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:23,008 INFO L225 Difference]: With dead ends: 95 [2020-09-04 17:43:23,008 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 17:43:23,009 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 [2020-09-04 17:43:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 17:43:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-04 17:43:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 17:43:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-04 17:43:23,022 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-09-04 17:43:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:23,022 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-04 17:43:23,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:43:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-04 17:43:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 17:43:23,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:23,025 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] [2020-09-04 17:43:23,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:43:23,026 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1369017959, now seen corresponding path program 2 times [2020-09-04 17:43:23,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:23,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568873999] [2020-09-04 17:43:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:23,032 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:23,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568873999] [2020-09-04 17:43:23,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:23,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:43:23,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031730561] [2020-09-04 17:43:23,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:43:23,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:43:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:43:23,349 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-09-04 17:43:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:23,740 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-09-04 17:43:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:43:23,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-04 17:43:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:23,743 INFO L225 Difference]: With dead ends: 113 [2020-09-04 17:43:23,743 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 17:43:23,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:43:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 17:43:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-04 17:43:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 17:43:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-04 17:43:23,759 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-09-04 17:43:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:23,760 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-04 17:43:23,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:43:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-04 17:43:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 17:43:23,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:23,767 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] [2020-09-04 17:43:23,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:43:23,768 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1346847595, now seen corresponding path program 3 times [2020-09-04 17:43:23,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:23,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520132250] [2020-09-04 17:43:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:23,776 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520132250] [2020-09-04 17:43:24,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:43:24,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560425533] [2020-09-04 17:43:24,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:43:24,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:43:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:43:24,183 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-09-04 17:43:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,643 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-09-04 17:43:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:43:24,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-04 17:43:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,645 INFO L225 Difference]: With dead ends: 119 [2020-09-04 17:43:24,645 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 17:43:24,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:43:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 17:43:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-04 17:43:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 17:43:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-04 17:43:24,658 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-09-04 17:43:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,658 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-04 17:43:24,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:43:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-04 17:43:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 17:43:24,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,660 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] [2020-09-04 17:43:24,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:43:24,661 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1957832047, now seen corresponding path program 4 times [2020-09-04 17:43:24,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532307853] [2020-09-04 17:43:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,666 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:25,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532307853] [2020-09-04 17:43:25,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:25,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:43:25,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610481327] [2020-09-04 17:43:25,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:43:25,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:43:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:43:25,171 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-04 17:43:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:25,714 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-09-04 17:43:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:43:25,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 17:43:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:25,716 INFO L225 Difference]: With dead ends: 125 [2020-09-04 17:43:25,716 INFO L226 Difference]: Without dead ends: 88 [2020-09-04 17:43:25,718 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 [2020-09-04 17:43:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-04 17:43:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-04 17:43:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 17:43:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-09-04 17:43:25,730 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-09-04 17:43:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:25,730 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-09-04 17:43:25,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:43:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-09-04 17:43:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 17:43:25,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:25,732 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] [2020-09-04 17:43:25,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:43:25,732 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -897873011, now seen corresponding path program 5 times [2020-09-04 17:43:25,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:25,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510796236] [2020-09-04 17:43:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:25,738 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:26,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510796236] [2020-09-04 17:43:26,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:26,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 17:43:26,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795531312] [2020-09-04 17:43:26,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 17:43:26,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 17:43:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:43:26,298 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-09-04 17:43:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:26,927 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-09-04 17:43:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:43:26,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 17:43:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:26,929 INFO L225 Difference]: With dead ends: 131 [2020-09-04 17:43:26,929 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 17:43:26,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:43:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 17:43:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-04 17:43:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 17:43:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-09-04 17:43:26,942 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-09-04 17:43:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:26,943 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-09-04 17:43:26,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 17:43:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-09-04 17:43:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 17:43:26,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:26,944 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] [2020-09-04 17:43:26,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:43:26,945 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1891135607, now seen corresponding path program 6 times [2020-09-04 17:43:26,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:26,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292410107] [2020-09-04 17:43:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:26,953 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:27,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:27,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:27,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292410107] [2020-09-04 17:43:27,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:27,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-04 17:43:27,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623373370] [2020-09-04 17:43:27,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 17:43:27,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 17:43:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:43:27,642 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-09-04 17:43:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:28,468 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-09-04 17:43:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 17:43:28,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-04 17:43:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:28,470 INFO L225 Difference]: With dead ends: 137 [2020-09-04 17:43:28,470 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 17:43:28,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 17:43:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 17:43:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-04 17:43:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 17:43:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-09-04 17:43:28,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-09-04 17:43:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:28,491 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-09-04 17:43:28,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 17:43:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-09-04 17:43:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 17:43:28,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:28,493 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] [2020-09-04 17:43:28,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:43:28,493 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1348970117, now seen corresponding path program 7 times [2020-09-04 17:43:28,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:28,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647118819] [2020-09-04 17:43:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:28,498 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:28,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:28,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:29,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647118819] [2020-09-04 17:43:29,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:29,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-04 17:43:29,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086662896] [2020-09-04 17:43:29,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 17:43:29,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:29,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 17:43:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-04 17:43:29,353 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-09-04 17:43:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:30,224 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-04 17:43:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 17:43:30,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-09-04 17:43:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:30,227 INFO L225 Difference]: With dead ends: 143 [2020-09-04 17:43:30,227 INFO L226 Difference]: Without dead ends: 106 [2020-09-04 17:43:30,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 17:43:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-04 17:43:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-04 17:43:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 17:43:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-09-04 17:43:30,242 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-09-04 17:43:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:30,243 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-09-04 17:43:30,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 17:43:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-09-04 17:43:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 17:43:30,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:30,244 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] [2020-09-04 17:43:30,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:43:30,244 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1790865279, now seen corresponding path program 8 times [2020-09-04 17:43:30,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:30,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347552285] [2020-09-04 17:43:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:30,253 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:31,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347552285] [2020-09-04 17:43:31,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:31,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-09-04 17:43:31,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400500491] [2020-09-04 17:43:31,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 17:43:31,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:31,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 17:43:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:43:31,239 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-09-04 17:43:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:32,365 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-09-04 17:43:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 17:43:32,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-09-04 17:43:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:32,367 INFO L225 Difference]: With dead ends: 149 [2020-09-04 17:43:32,367 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 17:43:32,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 17:43:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 17:43:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-09-04 17:43:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-04 17:43:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-09-04 17:43:32,388 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-09-04 17:43:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:32,388 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-09-04 17:43:32,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 17:43:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-09-04 17:43:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 17:43:32,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:32,390 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] [2020-09-04 17:43:32,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:43:32,390 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1309995651, now seen corresponding path program 9 times [2020-09-04 17:43:32,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:32,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934317623] [2020-09-04 17:43:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:32,397 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:32,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:32,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:33,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934317623] [2020-09-04 17:43:33,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:33,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-09-04 17:43:33,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367341512] [2020-09-04 17:43:33,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 17:43:33,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 17:43:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:43:33,487 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-09-04 17:43:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:34,834 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-09-04 17:43:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-04 17:43:34,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-09-04 17:43:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:34,836 INFO L225 Difference]: With dead ends: 155 [2020-09-04 17:43:34,836 INFO L226 Difference]: Without dead ends: 118 [2020-09-04 17:43:34,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 17:43:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-04 17:43:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-09-04 17:43:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 17:43:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-04 17:43:34,851 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-09-04 17:43:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:34,851 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-04 17:43:34,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 17:43:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-04 17:43:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 17:43:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:34,852 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] [2020-09-04 17:43:34,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:43:34,853 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2094408327, now seen corresponding path program 10 times [2020-09-04 17:43:34,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:34,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054659051] [2020-09-04 17:43:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:34,862 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:36,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054659051] [2020-09-04 17:43:36,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:36,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-09-04 17:43:36,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609528352] [2020-09-04 17:43:36,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 17:43:36,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 17:43:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:43:36,260 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-09-04 17:43:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:37,498 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-04 17:43:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 17:43:37,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-09-04 17:43:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:37,500 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:43:37,500 INFO L226 Difference]: Without dead ends: 124 [2020-09-04 17:43:37,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 17:43:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-04 17:43:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-04 17:43:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-04 17:43:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-09-04 17:43:37,513 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-09-04 17:43:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:37,513 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-09-04 17:43:37,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 17:43:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-09-04 17:43:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 17:43:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:37,515 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] [2020-09-04 17:43:37,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:43:37,515 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 712228981, now seen corresponding path program 11 times [2020-09-04 17:43:37,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:37,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669547200] [2020-09-04 17:43:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:37,525 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:37,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:37,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669547200] [2020-09-04 17:43:38,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:38,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-09-04 17:43:38,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364696033] [2020-09-04 17:43:38,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 17:43:38,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 17:43:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:43:38,831 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-09-04 17:43:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:40,262 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-09-04 17:43:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-04 17:43:40,263 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-09-04 17:43:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:40,264 INFO L225 Difference]: With dead ends: 167 [2020-09-04 17:43:40,264 INFO L226 Difference]: Without dead ends: 130 [2020-09-04 17:43:40,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 17:43:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-04 17:43:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-04 17:43:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-04 17:43:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-09-04 17:43:40,279 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-09-04 17:43:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:40,280 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-09-04 17:43:40,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 17:43:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-09-04 17:43:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 17:43:40,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:40,282 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] [2020-09-04 17:43:40,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:43:40,282 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash -907118991, now seen corresponding path program 12 times [2020-09-04 17:43:40,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:40,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895837525] [2020-09-04 17:43:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:40,288 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:40,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:41,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895837525] [2020-09-04 17:43:41,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:41,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-09-04 17:43:41,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484292415] [2020-09-04 17:43:41,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 17:43:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 17:43:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:43:41,774 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-09-04 17:43:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:43,405 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-09-04 17:43:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 17:43:43,405 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-09-04 17:43:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:43,407 INFO L225 Difference]: With dead ends: 173 [2020-09-04 17:43:43,407 INFO L226 Difference]: Without dead ends: 136 [2020-09-04 17:43:43,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 17:43:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-04 17:43:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-04 17:43:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 17:43:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-04 17:43:43,424 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-09-04 17:43:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:43,424 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-04 17:43:43,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 17:43:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-04 17:43:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 17:43:43,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:43,426 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] [2020-09-04 17:43:43,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:43:43,426 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1081065325, now seen corresponding path program 13 times [2020-09-04 17:43:43,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:43,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902884510] [2020-09-04 17:43:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:43,436 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:43,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:43,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:45,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902884510] [2020-09-04 17:43:45,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:45,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-09-04 17:43:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836532054] [2020-09-04 17:43:45,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 17:43:45,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:45,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 17:43:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 17:43:45,157 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-09-04 17:43:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:47,086 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-09-04 17:43:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-04 17:43:47,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-09-04 17:43:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:47,089 INFO L225 Difference]: With dead ends: 179 [2020-09-04 17:43:47,089 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 17:43:47,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 17:43:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 17:43:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-04 17:43:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 17:43:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-04 17:43:47,104 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-09-04 17:43:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:47,104 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-04 17:43:47,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 17:43:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-04 17:43:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 17:43:47,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:47,106 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] [2020-09-04 17:43:47,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:43:47,106 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -444769431, now seen corresponding path program 14 times [2020-09-04 17:43:47,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:47,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178189300] [2020-09-04 17:43:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:47,112 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:47,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:47,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:49,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178189300] [2020-09-04 17:43:49,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:49,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-09-04 17:43:49,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627719784] [2020-09-04 17:43:49,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 17:43:49,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 17:43:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 17:43:49,048 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-09-04 17:43:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:51,141 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-09-04 17:43:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 17:43:51,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-09-04 17:43:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:51,144 INFO L225 Difference]: With dead ends: 185 [2020-09-04 17:43:51,144 INFO L226 Difference]: Without dead ends: 148 [2020-09-04 17:43:51,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 17:43:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-04 17:43:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-04 17:43:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 17:43:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-04 17:43:51,161 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-09-04 17:43:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:51,161 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-04 17:43:51,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 17:43:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-04 17:43:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 17:43:51,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:51,163 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] [2020-09-04 17:43:51,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:43:51,163 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1162676837, now seen corresponding path program 15 times [2020-09-04 17:43:51,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:51,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747027674] [2020-09-04 17:43:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:51,174 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:51,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:51,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:53,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747027674] [2020-09-04 17:43:53,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:53,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-09-04 17:43:53,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048590865] [2020-09-04 17:43:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 17:43:53,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 17:43:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 17:43:53,330 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-09-04 17:43:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:55,505 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-04 17:43:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-04 17:43:55,505 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-09-04 17:43:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:55,507 INFO L225 Difference]: With dead ends: 191 [2020-09-04 17:43:55,508 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 17:43:55,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 17:43:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 17:43:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-04 17:43:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 17:43:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-09-04 17:43:55,528 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-09-04 17:43:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:55,528 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-09-04 17:43:55,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 17:43:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-09-04 17:43:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 17:43:55,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:55,530 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] [2020-09-04 17:43:55,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:43:55,531 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash -591098783, now seen corresponding path program 16 times [2020-09-04 17:43:55,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:55,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241493815] [2020-09-04 17:43:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:55,542 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:55,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:55,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:57,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241493815] [2020-09-04 17:43:57,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:57,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-09-04 17:43:57,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373474607] [2020-09-04 17:43:57,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 17:43:57,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:57,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 17:43:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 17:43:57,785 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-09-04 17:44:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:00,246 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-09-04 17:44:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 17:44:00,247 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-09-04 17:44:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:00,249 INFO L225 Difference]: With dead ends: 197 [2020-09-04 17:44:00,249 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 17:44:00,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 17:44:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 17:44:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-04 17:44:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-04 17:44:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-09-04 17:44:00,267 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-09-04 17:44:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:00,267 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-09-04 17:44:00,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 17:44:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-09-04 17:44:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-04 17:44:00,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:00,269 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] [2020-09-04 17:44:00,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:44:00,270 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash -713449123, now seen corresponding path program 17 times [2020-09-04 17:44:00,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:00,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427320914] [2020-09-04 17:44:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:00,280 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:00,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:02,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427320914] [2020-09-04 17:44:02,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:02,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-09-04 17:44:02,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503910840] [2020-09-04 17:44:02,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 17:44:02,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 17:44:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 17:44:02,796 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-09-04 17:44:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:05,572 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-04 17:44:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-04 17:44:05,572 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-09-04 17:44:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:05,574 INFO L225 Difference]: With dead ends: 203 [2020-09-04 17:44:05,574 INFO L226 Difference]: Without dead ends: 166 [2020-09-04 17:44:05,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 17:44:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-04 17:44:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-09-04 17:44:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 17:44:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-09-04 17:44:05,597 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-09-04 17:44:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:05,598 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-09-04 17:44:05,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 17:44:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-09-04 17:44:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 17:44:05,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:05,599 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] [2020-09-04 17:44:05,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 17:44:05,600 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1045296807, now seen corresponding path program 18 times [2020-09-04 17:44:05,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:05,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033857554] [2020-09-04 17:44:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:05,605 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:05,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:05,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033857554] [2020-09-04 17:44:08,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:08,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-09-04 17:44:08,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232541875] [2020-09-04 17:44:08,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 17:44:08,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 17:44:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 17:44:08,329 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-09-04 17:44:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:11,448 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-09-04 17:44:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-04 17:44:11,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-09-04 17:44:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:11,453 INFO L225 Difference]: With dead ends: 209 [2020-09-04 17:44:11,453 INFO L226 Difference]: Without dead ends: 172 [2020-09-04 17:44:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 17:44:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-04 17:44:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-09-04 17:44:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 17:44:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-09-04 17:44:11,476 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-09-04 17:44:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:11,477 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-09-04 17:44:11,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 17:44:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-09-04 17:44:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-04 17:44:11,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:11,478 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] [2020-09-04 17:44:11,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 17:44:11,479 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1482916949, now seen corresponding path program 19 times [2020-09-04 17:44:11,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:11,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497369380] [2020-09-04 17:44:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:11,490 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:11,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:11,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:14,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497369380] [2020-09-04 17:44:14,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:14,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-09-04 17:44:14,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441677132] [2020-09-04 17:44:14,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 17:44:14,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:14,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 17:44:14,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 17:44:14,420 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-09-04 17:44:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:17,492 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-09-04 17:44:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-04 17:44:17,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-09-04 17:44:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:17,495 INFO L225 Difference]: With dead ends: 215 [2020-09-04 17:44:17,495 INFO L226 Difference]: Without dead ends: 178 [2020-09-04 17:44:17,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 17:44:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-04 17:44:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-09-04 17:44:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-04 17:44:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-09-04 17:44:17,512 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-09-04 17:44:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:17,512 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-09-04 17:44:17,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 17:44:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-09-04 17:44:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-04 17:44:17,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:17,513 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] [2020-09-04 17:44:17,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 17:44:17,514 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash 825479761, now seen corresponding path program 20 times [2020-09-04 17:44:17,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:17,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47075282] [2020-09-04 17:44:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:17,521 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:17,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:17,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:20,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47075282] [2020-09-04 17:44:20,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:20,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-09-04 17:44:20,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486660271] [2020-09-04 17:44:20,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-04 17:44:20,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-04 17:44:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 17:44:20,802 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-09-04 17:44:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:24,409 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-09-04 17:44:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-04 17:44:24,410 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-09-04 17:44:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:24,411 INFO L225 Difference]: With dead ends: 221 [2020-09-04 17:44:24,411 INFO L226 Difference]: Without dead ends: 184 [2020-09-04 17:44:24,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 17:44:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-04 17:44:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-09-04 17:44:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-04 17:44:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-09-04 17:44:24,435 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-09-04 17:44:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:24,436 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-09-04 17:44:24,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-04 17:44:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-09-04 17:44:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 17:44:24,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:24,437 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] [2020-09-04 17:44:24,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 17:44:24,437 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2139573427, now seen corresponding path program 21 times [2020-09-04 17:44:24,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:24,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247021351] [2020-09-04 17:44:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:24,445 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:24,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:24,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247021351] [2020-09-04 17:44:27,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:27,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-09-04 17:44:27,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979812566] [2020-09-04 17:44:27,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 17:44:27,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 17:44:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 17:44:27,979 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-09-04 17:44:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:31,756 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-09-04 17:44:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-09-04 17:44:31,757 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-09-04 17:44:31,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:31,760 INFO L225 Difference]: With dead ends: 227 [2020-09-04 17:44:31,760 INFO L226 Difference]: Without dead ends: 190 [2020-09-04 17:44:31,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 17:44:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-04 17:44:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-09-04 17:44:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 17:44:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-09-04 17:44:31,787 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-09-04 17:44:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:31,788 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-09-04 17:44:31,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 17:44:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-09-04 17:44:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-04 17:44:31,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:31,789 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] [2020-09-04 17:44:31,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 17:44:31,790 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -751311031, now seen corresponding path program 22 times [2020-09-04 17:44:31,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:31,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674203723] [2020-09-04 17:44:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:31,798 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:31,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:31,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:35,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674203723] [2020-09-04 17:44:35,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:35,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-09-04 17:44:35,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252571628] [2020-09-04 17:44:35,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-04 17:44:35,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:35,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-04 17:44:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 17:44:35,546 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-09-04 17:44:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:39,565 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-09-04 17:44:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-04 17:44:39,566 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-09-04 17:44:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:39,569 INFO L225 Difference]: With dead ends: 233 [2020-09-04 17:44:39,569 INFO L226 Difference]: Without dead ends: 196 [2020-09-04 17:44:39,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 17:44:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-04 17:44:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-09-04 17:44:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-04 17:44:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-09-04 17:44:39,591 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-09-04 17:44:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:39,591 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-09-04 17:44:39,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-04 17:44:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-09-04 17:44:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-04 17:44:39,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:39,592 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] [2020-09-04 17:44:39,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 17:44:39,593 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash -886624699, now seen corresponding path program 23 times [2020-09-04 17:44:39,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:39,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822618742] [2020-09-04 17:44:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:39,599 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:39,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:43,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822618742] [2020-09-04 17:44:43,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:43,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-09-04 17:44:43,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28790378] [2020-09-04 17:44:43,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 17:44:43,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 17:44:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 17:44:43,641 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-09-04 17:44:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:47,932 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-09-04 17:44:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-09-04 17:44:47,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-09-04 17:44:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:47,935 INFO L225 Difference]: With dead ends: 239 [2020-09-04 17:44:47,935 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 17:44:47,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 17:44:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 17:44:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-09-04 17:44:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-04 17:44:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-09-04 17:44:47,962 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-09-04 17:44:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:47,963 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-09-04 17:44:47,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 17:44:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-09-04 17:44:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-04 17:44:47,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:47,964 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] [2020-09-04 17:44:47,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 17:44:47,964 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash -626243519, now seen corresponding path program 24 times [2020-09-04 17:44:47,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:47,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230419502] [2020-09-04 17:44:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:47,969 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:52,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230419502] [2020-09-04 17:44:52,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:52,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-09-04 17:44:52,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781822720] [2020-09-04 17:44:52,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 17:44:52,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:52,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 17:44:52,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 17:44:52,322 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-09-04 17:44:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:56,915 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-09-04 17:44:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-04 17:44:56,916 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-09-04 17:44:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:56,918 INFO L225 Difference]: With dead ends: 245 [2020-09-04 17:44:56,918 INFO L226 Difference]: Without dead ends: 208 [2020-09-04 17:44:56,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-09-04 17:44:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-04 17:44:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-09-04 17:44:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 17:44:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-09-04 17:44:56,963 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-09-04 17:44:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:56,964 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-09-04 17:44:56,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 17:44:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-09-04 17:44:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-04 17:44:56,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:56,965 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] [2020-09-04 17:44:56,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 17:44:56,966 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 14480701, now seen corresponding path program 25 times [2020-09-04 17:44:56,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:56,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296297126] [2020-09-04 17:44:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:56,975 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:57,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:01,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296297126] [2020-09-04 17:45:01,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:01,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-09-04 17:45:01,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347070405] [2020-09-04 17:45:01,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 17:45:01,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 17:45:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 17:45:01,713 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-09-04 17:45:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:06,763 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-09-04 17:45:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-09-04 17:45:06,763 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-09-04 17:45:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:06,765 INFO L225 Difference]: With dead ends: 251 [2020-09-04 17:45:06,765 INFO L226 Difference]: Without dead ends: 214 [2020-09-04 17:45:06,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-09-04 17:45:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-04 17:45:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-09-04 17:45:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-09-04 17:45:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-09-04 17:45:06,809 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-09-04 17:45:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:06,810 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-09-04 17:45:06,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 17:45:06,810 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-09-04 17:45:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-04 17:45:06,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:06,813 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] [2020-09-04 17:45:06,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 17:45:06,813 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2055277255, now seen corresponding path program 26 times [2020-09-04 17:45:06,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:06,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957259054] [2020-09-04 17:45:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:06,825 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:06,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:07,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:11,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957259054] [2020-09-04 17:45:11,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:11,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-09-04 17:45:11,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696023469] [2020-09-04 17:45:11,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-04 17:45:11,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:11,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-04 17:45:11,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 17:45:11,911 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-09-04 17:45:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:17,230 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-09-04 17:45:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-04 17:45:17,231 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-09-04 17:45:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:17,232 INFO L225 Difference]: With dead ends: 257 [2020-09-04 17:45:17,233 INFO L226 Difference]: Without dead ends: 220 [2020-09-04 17:45:17,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-09-04 17:45:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-04 17:45:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-09-04 17:45:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-04 17:45:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-09-04 17:45:17,267 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-09-04 17:45:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:17,268 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-09-04 17:45:17,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-04 17:45:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-09-04 17:45:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-04 17:45:17,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:17,270 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] [2020-09-04 17:45:17,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 17:45:17,270 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1257764811, now seen corresponding path program 27 times [2020-09-04 17:45:17,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:17,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215392427] [2020-09-04 17:45:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:17,280 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:17,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:17,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:22,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215392427] [2020-09-04 17:45:22,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:22,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-09-04 17:45:22,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582632555] [2020-09-04 17:45:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 17:45:22,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 17:45:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 17:45:22,636 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-09-04 17:45:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:28,409 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-09-04 17:45:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-09-04 17:45:28,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-09-04 17:45:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:28,412 INFO L225 Difference]: With dead ends: 263 [2020-09-04 17:45:28,412 INFO L226 Difference]: Without dead ends: 226 [2020-09-04 17:45:28,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-09-04 17:45:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-04 17:45:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-09-04 17:45:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 17:45:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-09-04 17:45:28,447 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-09-04 17:45:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:28,448 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-09-04 17:45:28,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 17:45:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-09-04 17:45:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 17:45:28,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:28,449 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] [2020-09-04 17:45:28,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 17:45:28,450 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1667371471, now seen corresponding path program 28 times [2020-09-04 17:45:28,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:28,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647903187] [2020-09-04 17:45:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:28,460 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:28,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:34,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647903187] [2020-09-04 17:45:34,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:34,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-09-04 17:45:34,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664912065] [2020-09-04 17:45:34,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-04 17:45:34,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-04 17:45:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 17:45:34,263 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-09-04 17:45:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:40,498 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-09-04 17:45:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-09-04 17:45:40,499 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-09-04 17:45:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:40,502 INFO L225 Difference]: With dead ends: 269 [2020-09-04 17:45:40,502 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 17:45:40,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-09-04 17:45:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 17:45:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-09-04 17:45:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-09-04 17:45:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-09-04 17:45:40,550 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-09-04 17:45:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:40,550 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-09-04 17:45:40,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-04 17:45:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-09-04 17:45:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-04 17:45:40,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:40,552 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] [2020-09-04 17:45:40,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 17:45:40,553 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash -971610323, now seen corresponding path program 29 times [2020-09-04 17:45:40,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:40,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488130768] [2020-09-04 17:45:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:40,557 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:40,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:40,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:46,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488130768] [2020-09-04 17:45:46,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:46,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-09-04 17:45:46,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025796663] [2020-09-04 17:45:46,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 17:45:46,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 17:45:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 17:45:46,804 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-09-04 17:45:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:53,509 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-09-04 17:45:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-09-04 17:45:53,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-09-04 17:45:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:53,512 INFO L225 Difference]: With dead ends: 275 [2020-09-04 17:45:53,512 INFO L226 Difference]: Without dead ends: 238 [2020-09-04 17:45:53,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-09-04 17:45:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-04 17:45:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-09-04 17:45:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 17:45:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-09-04 17:45:53,540 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-09-04 17:45:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:53,540 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-09-04 17:45:53,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 17:45:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-09-04 17:45:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-04 17:45:53,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:53,542 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] [2020-09-04 17:45:53,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 17:45:53,542 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash -201903319, now seen corresponding path program 30 times [2020-09-04 17:45:53,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:53,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356033710] [2020-09-04 17:45:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:53,553 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:53,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:00,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356033710] [2020-09-04 17:46:00,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:00,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-09-04 17:46:00,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396033577] [2020-09-04 17:46:00,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-09-04 17:46:00,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-09-04 17:46:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 17:46:00,313 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-09-04 17:46:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:07,579 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-09-04 17:46:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-09-04 17:46:07,580 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-09-04 17:46:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:07,581 INFO L225 Difference]: With dead ends: 281 [2020-09-04 17:46:07,582 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 17:46:07,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-09-04 17:46:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 17:46:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-09-04 17:46:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 17:46:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-09-04 17:46:07,622 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-09-04 17:46:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:07,622 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-09-04 17:46:07,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-09-04 17:46:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-09-04 17:46:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 17:46:07,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:07,624 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] [2020-09-04 17:46:07,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 17:46:07,624 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash -579464667, now seen corresponding path program 31 times [2020-09-04 17:46:07,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:07,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165517674] [2020-09-04 17:46:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:07,634 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:14,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165517674] [2020-09-04 17:46:14,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:14,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-09-04 17:46:14,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312676141] [2020-09-04 17:46:14,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 17:46:14,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 17:46:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 17:46:14,913 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-09-04 17:46:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:22,457 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-09-04 17:46:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-09-04 17:46:22,458 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-09-04 17:46:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:22,460 INFO L225 Difference]: With dead ends: 287 [2020-09-04 17:46:22,460 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 17:46:22,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-09-04 17:46:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 17:46:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-09-04 17:46:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-04 17:46:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-09-04 17:46:22,499 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-09-04 17:46:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:22,499 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-09-04 17:46:22,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 17:46:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-09-04 17:46:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-04 17:46:22,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:22,500 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] [2020-09-04 17:46:22,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 17:46:22,500 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -361184223, now seen corresponding path program 32 times [2020-09-04 17:46:22,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:22,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862870244] [2020-09-04 17:46:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:22,506 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:22,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:30,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862870244] [2020-09-04 17:46:30,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:30,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-09-04 17:46:30,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359483793] [2020-09-04 17:46:30,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-09-04 17:46:30,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-09-04 17:46:30,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 17:46:30,020 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-09-04 17:46:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:38,384 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-09-04 17:46:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-09-04 17:46:38,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-09-04 17:46:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:38,387 INFO L225 Difference]: With dead ends: 293 [2020-09-04 17:46:38,387 INFO L226 Difference]: Without dead ends: 256 [2020-09-04 17:46:38,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-09-04 17:46:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-04 17:46:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-09-04 17:46:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 17:46:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-09-04 17:46:38,419 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-09-04 17:46:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:38,419 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-09-04 17:46:38,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-09-04 17:46:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-09-04 17:46:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-04 17:46:38,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:38,421 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] [2020-09-04 17:46:38,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 17:46:38,421 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash -275445475, now seen corresponding path program 33 times [2020-09-04 17:46:38,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:38,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173908] [2020-09-04 17:46:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:38,426 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:38,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:38,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:46,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173908] [2020-09-04 17:46:46,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:46,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-09-04 17:46:46,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223982838] [2020-09-04 17:46:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-09-04 17:46:46,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-09-04 17:46:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 17:46:46,248 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-09-04 17:46:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:54,731 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-09-04 17:46:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-09-04 17:46:54,732 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-09-04 17:46:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:54,734 INFO L225 Difference]: With dead ends: 299 [2020-09-04 17:46:54,734 INFO L226 Difference]: Without dead ends: 262 [2020-09-04 17:46:54,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-09-04 17:46:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-04 17:46:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-09-04 17:46:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 17:46:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-09-04 17:46:54,782 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-09-04 17:46:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:54,782 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-09-04 17:46:54,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-09-04 17:46:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-09-04 17:46:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-04 17:46:54,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:54,784 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] [2020-09-04 17:46:54,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 17:46:54,784 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -368008935, now seen corresponding path program 34 times [2020-09-04 17:46:54,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:54,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873044486] [2020-09-04 17:46:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:54,789 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:54,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:03,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873044486] [2020-09-04 17:47:03,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-09-04 17:47:03,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658099268] [2020-09-04 17:47:03,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-09-04 17:47:03,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-09-04 17:47:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 17:47:03,224 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-09-04 17:47:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:12,309 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-09-04 17:47:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-09-04 17:47:12,310 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-09-04 17:47:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:12,312 INFO L225 Difference]: With dead ends: 305 [2020-09-04 17:47:12,312 INFO L226 Difference]: Without dead ends: 268 [2020-09-04 17:47:12,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-09-04 17:47:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-09-04 17:47:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-09-04 17:47:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-04 17:47:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-09-04 17:47:12,366 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-09-04 17:47:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:12,366 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-09-04 17:47:12,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-09-04 17:47:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-09-04 17:47:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-09-04 17:47:12,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:12,368 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] [2020-09-04 17:47:12,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 17:47:12,369 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1142862827, now seen corresponding path program 35 times [2020-09-04 17:47:12,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:12,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990349370] [2020-09-04 17:47:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:12,384 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:21,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990349370] [2020-09-04 17:47:21,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:21,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-09-04 17:47:21,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108880737] [2020-09-04 17:47:21,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-09-04 17:47:21,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-09-04 17:47:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 17:47:21,456 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-09-04 17:47:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:31,322 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-09-04 17:47:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-09-04 17:47:31,323 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-09-04 17:47:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:31,325 INFO L225 Difference]: With dead ends: 311 [2020-09-04 17:47:31,325 INFO L226 Difference]: Without dead ends: 274 [2020-09-04 17:47:31,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-09-04 17:47:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-04 17:47:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-09-04 17:47:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-04 17:47:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-09-04 17:47:31,376 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-09-04 17:47:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:31,377 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-09-04 17:47:31,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-09-04 17:47:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-09-04 17:47:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-04 17:47:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:31,379 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] [2020-09-04 17:47:31,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 17:47:31,379 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash -408106479, now seen corresponding path program 36 times [2020-09-04 17:47:31,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:31,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007713221] [2020-09-04 17:47:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:31,389 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:31,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:41,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007713221] [2020-09-04 17:47:41,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:41,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-09-04 17:47:41,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710156353] [2020-09-04 17:47:41,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-09-04 17:47:41,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-09-04 17:47:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 17:47:41,327 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-09-04 17:47:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:52,100 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-09-04 17:47:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-09-04 17:47:52,101 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-09-04 17:47:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:52,103 INFO L225 Difference]: With dead ends: 317 [2020-09-04 17:47:52,103 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 17:47:52,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-09-04 17:47:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 17:47:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-09-04 17:47:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-04 17:47:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-09-04 17:47:52,146 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-09-04 17:47:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:52,146 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-09-04 17:47:52,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-09-04 17:47:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-09-04 17:47:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-04 17:47:52,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:52,148 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] [2020-09-04 17:47:52,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 17:47:52,149 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1288231693, now seen corresponding path program 37 times [2020-09-04 17:47:52,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:52,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091837455] [2020-09-04 17:47:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:52,159 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:52,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:52,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:03,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091837455] [2020-09-04 17:48:03,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:03,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-09-04 17:48:03,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536931139] [2020-09-04 17:48:03,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-09-04 17:48:03,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-09-04 17:48:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 17:48:03,063 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-09-04 17:48:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:14,892 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-09-04 17:48:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-09-04 17:48:14,894 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-09-04 17:48:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:14,896 INFO L225 Difference]: With dead ends: 323 [2020-09-04 17:48:14,896 INFO L226 Difference]: Without dead ends: 286 [2020-09-04 17:48:14,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-09-04 17:48:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-04 17:48:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-09-04 17:48:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-04 17:48:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-09-04 17:48:14,944 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-09-04 17:48:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:14,945 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-09-04 17:48:14,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-09-04 17:48:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-09-04 17:48:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 17:48:14,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:14,947 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] [2020-09-04 17:48:14,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 17:48:14,947 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash -482656503, now seen corresponding path program 38 times [2020-09-04 17:48:14,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:14,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262055052] [2020-09-04 17:48:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:14,959 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:15,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:48:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:27,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262055052] [2020-09-04 17:48:27,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:27,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-09-04 17:48:27,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84027807] [2020-09-04 17:48:27,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-09-04 17:48:27,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:27,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-09-04 17:48:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 17:48:27,005 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-09-04 17:48:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:40,970 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-09-04 17:48:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-09-04 17:48:40,972 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-09-04 17:48:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:40,974 INFO L225 Difference]: With dead ends: 329 [2020-09-04 17:48:40,974 INFO L226 Difference]: Without dead ends: 292 [2020-09-04 17:48:40,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-09-04 17:48:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-04 17:48:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-09-04 17:48:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-09-04 17:48:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-09-04 17:48:41,027 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-09-04 17:48:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:41,028 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-09-04 17:48:41,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-09-04 17:48:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-09-04 17:48:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-04 17:48:41,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:41,030 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] [2020-09-04 17:48:41,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 17:48:41,030 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2008659461, now seen corresponding path program 39 times [2020-09-04 17:48:41,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:41,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814718909] [2020-09-04 17:48:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:41,041 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:41,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:41,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:48:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:54,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814718909] [2020-09-04 17:48:54,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:54,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-09-04 17:48:54,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136182756] [2020-09-04 17:48:54,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-09-04 17:48:54,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:54,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-09-04 17:48:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 17:48:54,769 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-09-04 17:49:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:10,251 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-09-04 17:49:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-09-04 17:49:10,254 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-09-04 17:49:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:10,255 INFO L225 Difference]: With dead ends: 335 [2020-09-04 17:49:10,256 INFO L226 Difference]: Without dead ends: 298 [2020-09-04 17:49:10,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-09-04 17:49:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-04 17:49:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-09-04 17:49:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 17:49:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-09-04 17:49:10,311 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-09-04 17:49:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:10,312 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-09-04 17:49:10,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-09-04 17:49:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-09-04 17:49:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-09-04 17:49:10,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:10,314 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] [2020-09-04 17:49:10,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 17:49:10,315 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1739194369, now seen corresponding path program 40 times [2020-09-04 17:49:10,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:10,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685201710] [2020-09-04 17:49:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:10,322 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:10,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:10,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:49:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:26,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685201710] [2020-09-04 17:49:26,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:26,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-09-04 17:49:26,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969953277] [2020-09-04 17:49:26,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-09-04 17:49:26,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-09-04 17:49:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 17:49:26,158 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-09-04 17:49:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:45,733 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-09-04 17:49:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-04 17:49:45,735 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-09-04 17:49:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:45,737 INFO L225 Difference]: With dead ends: 341 [2020-09-04 17:49:45,738 INFO L226 Difference]: Without dead ends: 304 [2020-09-04 17:49:45,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-09-04 17:49:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-04 17:49:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-09-04 17:49:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-09-04 17:49:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-09-04 17:49:45,799 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-09-04 17:49:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:45,800 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-09-04 17:49:45,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-09-04 17:49:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-09-04 17:49:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-04 17:49:45,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:45,802 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] [2020-09-04 17:49:45,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 17:49:45,802 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1562500349, now seen corresponding path program 41 times [2020-09-04 17:49:45,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:45,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186537815] [2020-09-04 17:49:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:45,819 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:45,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:46,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:49:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:05,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186537815] [2020-09-04 17:50:05,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:05,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-09-04 17:50:05,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700744975] [2020-09-04 17:50:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-09-04 17:50:05,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-09-04 17:50:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 17:50:05,133 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-09-04 17:50:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:28,678 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-09-04 17:50:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-09-04 17:50:28,680 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-09-04 17:50:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:28,682 INFO L225 Difference]: With dead ends: 347 [2020-09-04 17:50:28,682 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 17:50:28,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-09-04 17:50:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 17:50:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-09-04 17:50:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-04 17:50:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-09-04 17:50:28,770 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-09-04 17:50:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:28,770 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-09-04 17:50:28,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-09-04 17:50:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-09-04 17:50:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-09-04 17:50:28,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:28,773 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] [2020-09-04 17:50:28,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 17:50:28,773 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash 182914297, now seen corresponding path program 42 times [2020-09-04 17:50:28,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:28,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564913778] [2020-09-04 17:50:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:28,783 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:29,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:50:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:51,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564913778] [2020-09-04 17:50:51,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:51,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-09-04 17:50:51,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11866710] [2020-09-04 17:50:51,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-09-04 17:50:51,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-09-04 17:50:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 17:50:51,891 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-09-04 17:51:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:17,411 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-09-04 17:51:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-09-04 17:51:17,414 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-09-04 17:51:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:17,416 INFO L225 Difference]: With dead ends: 353 [2020-09-04 17:51:17,417 INFO L226 Difference]: Without dead ends: 316 [2020-09-04 17:51:17,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-09-04 17:51:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-09-04 17:51:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-09-04 17:51:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 17:51:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-09-04 17:51:17,482 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-09-04 17:51:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:17,482 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-09-04 17:51:17,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-09-04 17:51:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-09-04 17:51:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 17:51:17,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:17,485 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] [2020-09-04 17:51:17,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 17:51:17,485 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash -395358219, now seen corresponding path program 43 times [2020-09-04 17:51:17,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:17,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752449937] [2020-09-04 17:51:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:17,497 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:17,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:51:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:19,833 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:51:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:51:44,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752449937] [2020-09-04 17:51:44,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:51:44,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-09-04 17:51:44,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116182395] [2020-09-04 17:51:44,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-09-04 17:51:44,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:51:44,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-09-04 17:51:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 17:51:44,831 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-09-04 17:52:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:52:17,300 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-09-04 17:52:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-09-04 17:52:17,303 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-09-04 17:52:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:52:17,305 INFO L225 Difference]: With dead ends: 359 [2020-09-04 17:52:17,306 INFO L226 Difference]: Without dead ends: 322 [2020-09-04 17:52:17,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-09-04 17:52:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-04 17:52:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-09-04 17:52:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-04 17:52:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-09-04 17:52:17,401 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-09-04 17:52:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:52:17,401 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-09-04 17:52:17,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-09-04 17:52:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-09-04 17:52:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-09-04 17:52:17,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:52:17,404 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] [2020-09-04 17:52:17,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 17:52:17,404 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:52:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:52:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash -304060943, now seen corresponding path program 44 times [2020-09-04 17:52:17,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:52:17,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179900968] [2020-09-04 17:52:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:52:17,411 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:52:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:17,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:52:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:17,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:52:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:18,461 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:18,613 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:18,773 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:19,097 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:19,272 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:19,455 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:19,645 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:19,835 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:20,028 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:20,413 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:20,622 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:20,840 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:21,055 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:21,509 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:22,223 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:22,467 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:22,708 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:23,536 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:23,814 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:24,384 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:24,985 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:25,287 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:25,587 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:26,210 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:26,840 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:28,866 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:29,236 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:32,230 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:34,271 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:35,545 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:35,989 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:36,408 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:36,868 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:39,107 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:39,575 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:40,075 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:42,571 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:43,088 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:43,637 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:44,177 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:44,735 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:45,295 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:45,874 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:46,438 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:46,988 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:47,555 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:48,137 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:48,745 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:49,349 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:52:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:52:49,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179900968] [2020-09-04 17:52:49,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:49,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-09-04 17:52:49,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788458039] [2020-09-04 17:52:49,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-09-04 17:52:49,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:49,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-09-04 17:52:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 17:52:49,816 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-09-04 17:53:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:53:27,034 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-09-04 17:53:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-09-04 17:53:27,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-09-04 17:53:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:53:27,040 INFO L225 Difference]: With dead ends: 365 [2020-09-04 17:53:27,040 INFO L226 Difference]: Without dead ends: 328 [2020-09-04 17:53:27,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-09-04 17:53:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-04 17:53:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-09-04 17:53:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-04 17:53:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-09-04 17:53:27,130 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-09-04 17:53:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:53:27,131 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-09-04 17:53:27,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-09-04 17:53:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-09-04 17:53:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-09-04 17:53:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:53:27,134 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] [2020-09-04 17:53:27,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 17:53:27,134 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:53:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:53:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1343229677, now seen corresponding path program 45 times [2020-09-04 17:53:27,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:53:27,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945002528] [2020-09-04 17:53:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:53:27,146 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:53:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:27,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:53:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:27,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:53:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:27,860 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,003 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,161 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,318 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,481 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,656 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:28,828 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:29,021 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:29,205 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:29,392 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:29,763 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:29,961 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:30,369 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:30,598 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:30,837 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:31,080 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:31,330 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:31,596 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:31,863 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:32,125 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:32,398 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:32,687 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:33,473 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:34,578 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:34,918 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:35,263 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:35,616 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:35,977 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:36,353 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:36,726 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:37,094 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:37,468 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:37,855 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:38,251 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:38,654 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:39,059 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:39,469 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:39,886 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:40,297 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:40,730 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,168 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,608 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:42,057 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:42,517 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:42,975 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:43,435 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:43,902 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:44,377 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:44,869 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:45,360 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:45,862 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:46,365 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:46,874 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:47,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:47,904 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:48,451 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:48,992 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:49,563 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:50,099 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:50,653 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:51,217 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:51,783 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:52,365 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:52,942 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:53,518 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:54,121 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:54,718 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:55,324 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:55,891 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:58,006 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:58,660 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:59,328 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:00,002 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:00,662 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:01,951 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:02,667 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:03,390 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:04,128 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:04,862 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:05,603 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:54:06,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945002528] [2020-09-04 17:54:06,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:54:06,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-09-04 17:54:06,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156409567] [2020-09-04 17:54:06,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-09-04 17:54:06,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:54:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-09-04 17:54:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 17:54:06,073 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-09-04 17:54:08,939 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-09-04 17:54:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:54:49,807 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-09-04 17:54:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-09-04 17:54:49,812 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-09-04 17:54:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:54:49,814 INFO L225 Difference]: With dead ends: 371 [2020-09-04 17:54:49,814 INFO L226 Difference]: Without dead ends: 334 [2020-09-04 17:54:49,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-09-04 17:54:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-04 17:54:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-09-04 17:54:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 17:54:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-09-04 17:54:49,870 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-09-04 17:54:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:54:49,870 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-09-04 17:54:49,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-09-04 17:54:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-09-04 17:54:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-04 17:54:49,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:54:49,873 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] [2020-09-04 17:54:49,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 17:54:49,874 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:54:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:54:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1015286505, now seen corresponding path program 46 times [2020-09-04 17:54:49,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:54:49,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052499491] [2020-09-04 17:54:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:54:49,881 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:54:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:54:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:50,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:54:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:50,694 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:50,848 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,032 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,215 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,415 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,619 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,824 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,042 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,253 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,468 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,707 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,955 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,200 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,446 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,702 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,964 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,241 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,516 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,801 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:55,080 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:55,389 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:55,699 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:56,007 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:56,312 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:56,640 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:56,971 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:57,306 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:57,643 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:57,969 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:58,327 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:58,690 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:59,044 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:59,422 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:59,807 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:00,196 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:00,571 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:00,981 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:01,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:01,785 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:02,234 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:02,670 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:03,105 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:03,540 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:03,995 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:04,451 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:04,895 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:05,351 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:05,822 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:06,282 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:06,743 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:07,245 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:07,735 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:08,239 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:08,759 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:09,252 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:09,778 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:10,304 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:10,830 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:11,366 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:11,919 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:12,443 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:12,966 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:13,518 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:14,096 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:14,692 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:15,306 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:16,431 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:18,517 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:19,203 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:19,893 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:20,577 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:21,257 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:21,955 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:22,648 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:23,353 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:24,065 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:24,776 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:25,520 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:26,260 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:26,995 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:27,751 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:28,503 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:29,246 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:30,009 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:30,765 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:31,532 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:32,300 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:33,079 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:33,869 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:55:34,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052499491] [2020-09-04 17:55:34,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:34,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-09-04 17:55:34,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496836760] [2020-09-04 17:55:34,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-09-04 17:55:34,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-09-04 17:55:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 17:55:34,388 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-09-04 17:55:36,033 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-09-04 17:55:43,146 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-09-04 17:56:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:21,526 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-09-04 17:56:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-09-04 17:56:21,532 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-09-04 17:56:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:21,534 INFO L225 Difference]: With dead ends: 377 [2020-09-04 17:56:21,534 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 17:56:21,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-09-04 17:56:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 17:56:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-09-04 17:56:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-09-04 17:56:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-09-04 17:56:21,592 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-09-04 17:56:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:21,593 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-09-04 17:56:21,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-09-04 17:56:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-09-04 17:56:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-09-04 17:56:21,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:21,595 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] [2020-09-04 17:56:21,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 17:56:21,595 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1787684379, now seen corresponding path program 47 times [2020-09-04 17:56:21,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:21,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618082839] [2020-09-04 17:56:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:21,604 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:21,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:21,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:56:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:22,429 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:22,620 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:22,826 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:23,032 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:23,249 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:23,470 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:23,698 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:23,924 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:24,163 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:24,416 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:24,676 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:24,933 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:25,215 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:25,495 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:25,788 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:26,082 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:26,387 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12