/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:13,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:13,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:13,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:13,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:13,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:13,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:13,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:13,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:13,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:13,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:13,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:13,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:13,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:13,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:13,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:13,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:13,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:23:14,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:14,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:14,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:14,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:14,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:14,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:14,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:14,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:14,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:14,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:14,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:14,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:14,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:14,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:14,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:14,028 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:14,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:14,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:14,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:14,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:14,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:14,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:14,030 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:14,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:14,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:14,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:14,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:14,477 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:14,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-24 02:23:14,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b279d59c7/e3900a3dd0a04330a36212f042d35064/FLAGbfde04998 [2020-10-24 02:23:15,153 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:15,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-24 02:23:15,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b279d59c7/e3900a3dd0a04330a36212f042d35064/FLAGbfde04998 [2020-10-24 02:23:15,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b279d59c7/e3900a3dd0a04330a36212f042d35064 [2020-10-24 02:23:15,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:15,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:15,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:15,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:15,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:15,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f26024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15, skipping insertion in model container [2020-10-24 02:23:15,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:15,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:15,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:15,775 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:15,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:15,846 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:15,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15 WrapperNode [2020-10-24 02:23:15,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:15,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:15,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:15,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:15,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... [2020-10-24 02:23:15,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:15,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:15,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:15,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:15,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:16,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:16,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-24 02:23:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:23:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:23:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-10-24 02:23:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-24 02:23:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 02:23:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 02:23:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:16,581 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:16,581 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:23:16,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:16 BoogieIcfgContainer [2020-10-24 02:23:16,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:16,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:16,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:16,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:16,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:15" (1/3) ... [2020-10-24 02:23:16,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d250033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:16, skipping insertion in model container [2020-10-24 02:23:16,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:15" (2/3) ... [2020-10-24 02:23:16,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d250033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:16, skipping insertion in model container [2020-10-24 02:23:16,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:16" (3/3) ... [2020-10-24 02:23:16,594 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-10-24 02:23:16,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:16,613 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:16,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:16,656 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:16,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:16,656 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:16,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:16,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:16,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:16,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:16,657 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-24 02:23:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:23:16,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:16,691 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] [2020-10-24 02:23:16,691 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-10-24 02:23:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:16,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889673792] [2020-10-24 02:23:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:17,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889673792] [2020-10-24 02:23:17,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:17,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:17,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110854570] [2020-10-24 02:23:17,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:17,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:17,193 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-24 02:23:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:17,573 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-24 02:23:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:23:17,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-24 02:23:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:17,587 INFO L225 Difference]: With dead ends: 121 [2020-10-24 02:23:17,588 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:23:17,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:23:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-24 02:23:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 02:23:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-24 02:23:17,676 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-10-24 02:23:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:17,677 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-24 02:23:17,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-24 02:23:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:23:17,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:17,679 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:17,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:17,680 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-10-24 02:23:17,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654297586] [2020-10-24 02:23:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:17,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654297586] [2020-10-24 02:23:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:23:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285615412] [2020-10-24 02:23:17,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:23:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:23:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:23:17,867 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-10-24 02:23:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:18,161 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-24 02:23:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:23:18,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 02:23:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:18,165 INFO L225 Difference]: With dead ends: 100 [2020-10-24 02:23:18,165 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 02:23:18,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:23:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 02:23:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-24 02:23:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-24 02:23:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-24 02:23:18,182 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-10-24 02:23:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:18,183 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-24 02:23:18,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:23:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-24 02:23:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 02:23:18,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:18,186 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:18,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:18,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:18,187 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-10-24 02:23:18,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:18,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341781937] [2020-10-24 02:23:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:18,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341781937] [2020-10-24 02:23:18,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:18,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:23:18,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917636100] [2020-10-24 02:23:18,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:23:18,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:23:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:23:18,398 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-10-24 02:23:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:18,720 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-24 02:23:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:23:18,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-24 02:23:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:18,723 INFO L225 Difference]: With dead ends: 109 [2020-10-24 02:23:18,723 INFO L226 Difference]: Without dead ends: 70 [2020-10-24 02:23:18,724 INFO L677 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 [2020-10-24 02:23:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-24 02:23:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-24 02:23:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:23:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-24 02:23:18,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-10-24 02:23:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:18,737 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-24 02:23:18,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:23:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-24 02:23:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 02:23:18,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:18,739 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:18,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:18,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-10-24 02:23:18,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:18,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694783730] [2020-10-24 02:23:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:19,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694783730] [2020-10-24 02:23:19,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:19,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:23:19,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738475849] [2020-10-24 02:23:19,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:23:19,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:23:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:23:19,090 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-10-24 02:23:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:19,563 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-10-24 02:23:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:23:19,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-24 02:23:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:19,567 INFO L225 Difference]: With dead ends: 115 [2020-10-24 02:23:19,568 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 02:23:19,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:23:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 02:23:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-24 02:23:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-24 02:23:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-24 02:23:19,582 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-10-24 02:23:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:19,583 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-24 02:23:19,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:23:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-24 02:23:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-24 02:23:19,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:19,585 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:19,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:23:19,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-10-24 02:23:19,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:19,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850497413] [2020-10-24 02:23:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:20,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850497413] [2020-10-24 02:23:20,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:20,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:23:20,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948358766] [2020-10-24 02:23:20,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:23:20,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:23:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:23:20,041 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-10-24 02:23:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,596 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-10-24 02:23:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:23:20,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-24 02:23:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,599 INFO L225 Difference]: With dead ends: 121 [2020-10-24 02:23:20,599 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:23:20,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:23:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:23:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-24 02:23:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 02:23:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-24 02:23:20,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-10-24 02:23:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,616 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-24 02:23:20,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:23:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-24 02:23:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:23:20,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,618 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:20,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:23:20,619 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-10-24 02:23:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596584921] [2020-10-24 02:23:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:21,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596584921] [2020-10-24 02:23:21,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:21,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:23:21,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953797669] [2020-10-24 02:23:21,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:23:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:23:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:23:21,129 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-10-24 02:23:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:21,726 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-10-24 02:23:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:23:21,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-24 02:23:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:21,729 INFO L225 Difference]: With dead ends: 127 [2020-10-24 02:23:21,729 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 02:23:21,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:23:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 02:23:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-24 02:23:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:23:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-24 02:23:21,748 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-10-24 02:23:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:21,749 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-24 02:23:21,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:23:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-24 02:23:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 02:23:21,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:21,751 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:21,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:23:21,751 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-10-24 02:23:21,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:21,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123211872] [2020-10-24 02:23:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123211872] [2020-10-24 02:23:22,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:22,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:23:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160884723] [2020-10-24 02:23:22,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:23:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:23:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:23:22,366 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-24 02:23:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:23,032 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-24 02:23:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:23:23,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-24 02:23:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:23,035 INFO L225 Difference]: With dead ends: 133 [2020-10-24 02:23:23,036 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 02:23:23,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:23:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 02:23:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-24 02:23:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-24 02:23:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-24 02:23:23,072 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-10-24 02:23:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:23,073 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-24 02:23:23,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:23:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-24 02:23:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-24 02:23:23,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:23,083 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:23,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:23:23,084 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-10-24 02:23:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855206777] [2020-10-24 02:23:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:23,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:23,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855206777] [2020-10-24 02:23:23,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:23:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240367622] [2020-10-24 02:23:23,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:23:23,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:23:23,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:23:23,735 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-10-24 02:23:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:24,493 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-10-24 02:23:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:23:24,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-24 02:23:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:24,495 INFO L225 Difference]: With dead ends: 139 [2020-10-24 02:23:24,495 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 02:23:24,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:23:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 02:23:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-24 02:23:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-24 02:23:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-24 02:23:24,530 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-10-24 02:23:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:24,530 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-24 02:23:24,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:23:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-24 02:23:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 02:23:24,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:24,535 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:24,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:23:24,535 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:24,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-10-24 02:23:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:24,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012558838] [2020-10-24 02:23:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:25,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012558838] [2020-10-24 02:23:25,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:25,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:23:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762636600] [2020-10-24 02:23:25,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:23:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:23:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:23:25,369 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-10-24 02:23:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:26,277 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-10-24 02:23:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 02:23:26,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-24 02:23:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:26,280 INFO L225 Difference]: With dead ends: 145 [2020-10-24 02:23:26,280 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 02:23:26,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:23:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 02:23:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-24 02:23:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-24 02:23:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-24 02:23:26,300 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-10-24 02:23:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:26,301 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-24 02:23:26,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:23:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-24 02:23:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 02:23:26,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:26,302 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:26,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:23:26,302 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-10-24 02:23:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:26,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494480950] [2020-10-24 02:23:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:26,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:26,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:27,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494480950] [2020-10-24 02:23:27,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:27,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:23:27,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734355691] [2020-10-24 02:23:27,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:23:27,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:23:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:23:27,171 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-10-24 02:23:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:28,156 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-10-24 02:23:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:23:28,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-24 02:23:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:28,159 INFO L225 Difference]: With dead ends: 151 [2020-10-24 02:23:28,159 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:23:28,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:23:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:23:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-24 02:23:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-24 02:23:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-24 02:23:28,194 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-10-24 02:23:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:28,194 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-24 02:23:28,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:23:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-24 02:23:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 02:23:28,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:28,196 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:28,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:23:28,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-10-24 02:23:28,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:28,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213283706] [2020-10-24 02:23:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:28,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:28,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:29,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213283706] [2020-10-24 02:23:29,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:29,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:23:29,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008027970] [2020-10-24 02:23:29,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:23:29,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:23:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:23:29,202 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-10-24 02:23:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:30,333 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-10-24 02:23:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 02:23:30,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-24 02:23:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:30,335 INFO L225 Difference]: With dead ends: 157 [2020-10-24 02:23:30,335 INFO L226 Difference]: Without dead ends: 118 [2020-10-24 02:23:30,337 INFO L677 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 [2020-10-24 02:23:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-24 02:23:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-24 02:23:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-24 02:23:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-24 02:23:30,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-10-24 02:23:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:30,352 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-24 02:23:30,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:23:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-24 02:23:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-24 02:23:30,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:30,353 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:30,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:23:30,354 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-10-24 02:23:30,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:30,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133776653] [2020-10-24 02:23:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:30,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:31,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133776653] [2020-10-24 02:23:31,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:23:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087243547] [2020-10-24 02:23:31,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:23:31,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:23:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:23:31,458 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-10-24 02:23:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:32,675 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-10-24 02:23:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:23:32,676 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-24 02:23:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:32,679 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:23:32,679 INFO L226 Difference]: Without dead ends: 124 [2020-10-24 02:23:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:23:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-24 02:23:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-24 02:23:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-24 02:23:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-24 02:23:32,695 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-10-24 02:23:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:32,696 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-24 02:23:32,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:23:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-24 02:23:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-24 02:23:32,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:32,697 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:32,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:23:32,698 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:32,698 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-10-24 02:23:32,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:32,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319078578] [2020-10-24 02:23:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:32,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:32,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319078578] [2020-10-24 02:23:34,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:34,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:23:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404918557] [2020-10-24 02:23:34,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:23:34,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:23:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:23:34,115 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-10-24 02:23:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:35,565 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-10-24 02:23:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 02:23:35,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-24 02:23:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:35,568 INFO L225 Difference]: With dead ends: 169 [2020-10-24 02:23:35,568 INFO L226 Difference]: Without dead ends: 130 [2020-10-24 02:23:35,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:23:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-24 02:23:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-24 02:23:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-24 02:23:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-24 02:23:35,588 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-10-24 02:23:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:35,589 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-24 02:23:35,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:23:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-24 02:23:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 02:23:35,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:35,591 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:35,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:23:35,591 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-10-24 02:23:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:35,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809643204] [2020-10-24 02:23:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:35,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:37,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809643204] [2020-10-24 02:23:37,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:37,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:23:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919173066] [2020-10-24 02:23:37,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:23:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:23:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:23:37,021 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-10-24 02:23:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:38,579 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-10-24 02:23:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 02:23:38,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 02:23:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:38,581 INFO L225 Difference]: With dead ends: 175 [2020-10-24 02:23:38,581 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 02:23:38,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:23:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 02:23:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-24 02:23:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-24 02:23:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-24 02:23:38,600 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-10-24 02:23:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:38,601 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-24 02:23:38,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 02:23:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-24 02:23:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-24 02:23:38,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:38,602 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:38,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:23:38,603 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-10-24 02:23:38,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:38,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480941043] [2020-10-24 02:23:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:38,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:40,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480941043] [2020-10-24 02:23:40,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:40,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:23:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256797323] [2020-10-24 02:23:40,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:23:40,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:23:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:23:40,131 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-10-24 02:23:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:41,898 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-10-24 02:23:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 02:23:41,899 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-24 02:23:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:41,900 INFO L225 Difference]: With dead ends: 181 [2020-10-24 02:23:41,901 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 02:23:41,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:23:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 02:23:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-24 02:23:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-24 02:23:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-24 02:23:41,920 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-10-24 02:23:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:41,921 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-24 02:23:41,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:23:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-24 02:23:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-24 02:23:41,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:41,922 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:41,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:23:41,923 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-10-24 02:23:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:41,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705883182] [2020-10-24 02:23:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:42,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:43,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705883182] [2020-10-24 02:23:43,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:43,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 02:23:43,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294168915] [2020-10-24 02:23:43,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 02:23:43,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 02:23:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:23:43,584 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-10-24 02:23:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:45,426 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-10-24 02:23:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-24 02:23:45,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-10-24 02:23:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:45,429 INFO L225 Difference]: With dead ends: 187 [2020-10-24 02:23:45,429 INFO L226 Difference]: Without dead ends: 148 [2020-10-24 02:23:45,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:23:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-24 02:23:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-24 02:23:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-24 02:23:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-24 02:23:45,449 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-10-24 02:23:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:45,449 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-24 02:23:45,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 02:23:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-24 02:23:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-24 02:23:45,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:45,451 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:45,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:23:45,451 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-10-24 02:23:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:45,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312107244] [2020-10-24 02:23:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:47,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312107244] [2020-10-24 02:23:47,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:47,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 02:23:47,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189621369] [2020-10-24 02:23:47,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 02:23:47,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 02:23:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:23:47,269 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-10-24 02:23:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:49,634 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-10-24 02:23:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-24 02:23:49,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-24 02:23:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:49,636 INFO L225 Difference]: With dead ends: 193 [2020-10-24 02:23:49,637 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 02:23:49,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:23:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 02:23:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-24 02:23:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-24 02:23:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-10-24 02:23:49,658 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-10-24 02:23:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:49,658 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-10-24 02:23:49,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 02:23:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-10-24 02:23:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-24 02:23:49,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:49,660 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:49,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:23:49,661 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-10-24 02:23:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:49,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283484066] [2020-10-24 02:23:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:49,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:51,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283484066] [2020-10-24 02:23:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 02:23:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197454652] [2020-10-24 02:23:51,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 02:23:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 02:23:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:23:51,675 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-10-24 02:23:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:54,183 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-10-24 02:23:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-24 02:23:54,184 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-10-24 02:23:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:54,185 INFO L225 Difference]: With dead ends: 199 [2020-10-24 02:23:54,185 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 02:23:54,187 INFO L677 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 [2020-10-24 02:23:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 02:23:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-24 02:23:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 02:23:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-24 02:23:54,205 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-10-24 02:23:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:54,205 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-24 02:23:54,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 02:23:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-24 02:23:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 02:23:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:54,207 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:54,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:23:54,207 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-10-24 02:23:54,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:54,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131011615] [2020-10-24 02:23:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:54,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:23:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131011615] [2020-10-24 02:23:56,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:56,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:23:56,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159703918] [2020-10-24 02:23:56,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:23:56,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:23:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:23:56,440 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-10-24 02:23:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:58,907 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-10-24 02:23:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-24 02:23:58,908 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-10-24 02:23:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:58,910 INFO L225 Difference]: With dead ends: 205 [2020-10-24 02:23:58,910 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:23:58,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:23:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:23:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-24 02:23:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-24 02:23:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-10-24 02:23:58,929 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-10-24 02:23:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:58,929 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-10-24 02:23:58,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:23:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-10-24 02:23:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-24 02:23:58,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:58,931 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:23:58,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:23:58,932 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-10-24 02:23:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:58,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58377381] [2020-10-24 02:23:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:59,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:01,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58377381] [2020-10-24 02:24:01,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:01,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 02:24:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605364970] [2020-10-24 02:24:01,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 02:24:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:01,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 02:24:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:24:01,363 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-10-24 02:24:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:03,932 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-10-24 02:24:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-24 02:24:03,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-10-24 02:24:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:03,934 INFO L225 Difference]: With dead ends: 211 [2020-10-24 02:24:03,934 INFO L226 Difference]: Without dead ends: 172 [2020-10-24 02:24:03,937 INFO L677 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 [2020-10-24 02:24:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-24 02:24:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-24 02:24:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-24 02:24:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-24 02:24:03,961 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-10-24 02:24:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:03,961 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-24 02:24:03,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 02:24:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-24 02:24:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-24 02:24:03,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:03,963 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:03,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:24:03,963 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-10-24 02:24:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:03,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941170468] [2020-10-24 02:24:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:04,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:04,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:06,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941170468] [2020-10-24 02:24:06,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:06,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 02:24:06,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308650085] [2020-10-24 02:24:06,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 02:24:06,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 02:24:06,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:24:06,666 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-10-24 02:24:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:09,578 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-10-24 02:24:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-24 02:24:09,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-10-24 02:24:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:09,582 INFO L225 Difference]: With dead ends: 217 [2020-10-24 02:24:09,582 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 02:24:09,585 INFO L677 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 [2020-10-24 02:24:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 02:24:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-24 02:24:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-24 02:24:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-10-24 02:24:09,609 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-10-24 02:24:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:09,610 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-10-24 02:24:09,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 02:24:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-10-24 02:24:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-24 02:24:09,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:09,611 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:09,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:24:09,611 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-10-24 02:24:09,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:09,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067963224] [2020-10-24 02:24:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:09,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:12,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067963224] [2020-10-24 02:24:12,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:12,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 02:24:12,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479068114] [2020-10-24 02:24:12,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 02:24:12,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 02:24:12,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:24:12,493 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-10-24 02:24:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:15,623 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-10-24 02:24:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-24 02:24:15,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-10-24 02:24:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:15,629 INFO L225 Difference]: With dead ends: 223 [2020-10-24 02:24:15,629 INFO L226 Difference]: Without dead ends: 184 [2020-10-24 02:24:15,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:24:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-24 02:24:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-24 02:24:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-24 02:24:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-10-24 02:24:15,650 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-10-24 02:24:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:15,651 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-10-24 02:24:15,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 02:24:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-10-24 02:24:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-24 02:24:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:15,652 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:15,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:24:15,652 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-10-24 02:24:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:15,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51014084] [2020-10-24 02:24:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:15,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:15,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:18,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51014084] [2020-10-24 02:24:18,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:18,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-24 02:24:18,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207995691] [2020-10-24 02:24:18,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 02:24:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 02:24:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:18,776 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-10-24 02:24:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:22,225 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-10-24 02:24:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-24 02:24:22,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-10-24 02:24:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:22,228 INFO L225 Difference]: With dead ends: 229 [2020-10-24 02:24:22,228 INFO L226 Difference]: Without dead ends: 190 [2020-10-24 02:24:22,230 INFO L677 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 [2020-10-24 02:24:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-24 02:24:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-24 02:24:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-24 02:24:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-24 02:24:22,258 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-10-24 02:24:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:22,258 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-24 02:24:22,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 02:24:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-24 02:24:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 02:24:22,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:22,260 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:22,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:24:22,260 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-10-24 02:24:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945709971] [2020-10-24 02:24:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:22,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945709971] [2020-10-24 02:24:25,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:25,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-24 02:24:25,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694555134] [2020-10-24 02:24:25,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-24 02:24:25,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-24 02:24:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:24:25,689 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-10-24 02:24:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:29,376 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-10-24 02:24:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-24 02:24:29,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-10-24 02:24:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:29,378 INFO L225 Difference]: With dead ends: 235 [2020-10-24 02:24:29,378 INFO L226 Difference]: Without dead ends: 196 [2020-10-24 02:24:29,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:24:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-24 02:24:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-24 02:24:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-24 02:24:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-10-24 02:24:29,411 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-10-24 02:24:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:29,412 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-10-24 02:24:29,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-24 02:24:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-10-24 02:24:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-24 02:24:29,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:29,413 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:24:29,414 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-10-24 02:24:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:29,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863162772] [2020-10-24 02:24:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:33,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863162772] [2020-10-24 02:24:33,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:33,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-24 02:24:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621472386] [2020-10-24 02:24:33,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 02:24:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 02:24:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:24:33,333 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-10-24 02:24:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:37,620 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-10-24 02:24:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-24 02:24:37,621 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-10-24 02:24:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:37,622 INFO L225 Difference]: With dead ends: 241 [2020-10-24 02:24:37,622 INFO L226 Difference]: Without dead ends: 202 [2020-10-24 02:24:37,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 02:24:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-24 02:24:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-10-24 02:24:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-24 02:24:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-24 02:24:37,657 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-10-24 02:24:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:37,658 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-24 02:24:37,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 02:24:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-24 02:24:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-24 02:24:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:37,660 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:37,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:24:37,660 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-10-24 02:24:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:37,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948979145] [2020-10-24 02:24:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:41,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948979145] [2020-10-24 02:24:41,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:41,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-24 02:24:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99918953] [2020-10-24 02:24:41,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-24 02:24:41,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-24 02:24:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:24:41,862 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-10-24 02:24:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:46,522 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-10-24 02:24:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-24 02:24:46,522 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-10-24 02:24:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:46,525 INFO L225 Difference]: With dead ends: 247 [2020-10-24 02:24:46,525 INFO L226 Difference]: Without dead ends: 208 [2020-10-24 02:24:46,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-10-24 02:24:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-24 02:24:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-24 02:24:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 02:24:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-10-24 02:24:46,561 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-10-24 02:24:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:46,561 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-10-24 02:24:46,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-24 02:24:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-10-24 02:24:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-24 02:24:46,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:46,563 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:46,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:24:46,563 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-10-24 02:24:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75593534] [2020-10-24 02:24:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:46,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:51,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75593534] [2020-10-24 02:24:51,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:51,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-24 02:24:51,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658716279] [2020-10-24 02:24:51,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-24 02:24:51,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:51,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-24 02:24:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:24:51,121 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-10-24 02:24:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:56,398 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-10-24 02:24:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-24 02:24:56,400 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-10-24 02:24:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:56,402 INFO L225 Difference]: With dead ends: 253 [2020-10-24 02:24:56,402 INFO L226 Difference]: Without dead ends: 214 [2020-10-24 02:24:56,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-10-24 02:24:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-24 02:24:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-24 02:24:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-24 02:24:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-10-24 02:24:56,439 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-10-24 02:24:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:56,440 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-10-24 02:24:56,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-24 02:24:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-10-24 02:24:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-24 02:24:56,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:56,441 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:56,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:24:56,442 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-10-24 02:24:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:56,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754915021] [2020-10-24 02:24:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:56,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:01,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754915021] [2020-10-24 02:25:01,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:01,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-24 02:25:01,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484351078] [2020-10-24 02:25:01,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-24 02:25:01,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:01,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-24 02:25:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:25:01,393 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-10-24 02:25:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:06,626 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-10-24 02:25:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-24 02:25:06,626 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-10-24 02:25:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:06,628 INFO L225 Difference]: With dead ends: 259 [2020-10-24 02:25:06,628 INFO L226 Difference]: Without dead ends: 220 [2020-10-24 02:25:06,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-10-24 02:25:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-24 02:25:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-24 02:25:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-24 02:25:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-10-24 02:25:06,668 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-10-24 02:25:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:06,669 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-10-24 02:25:06,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-24 02:25:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-10-24 02:25:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-24 02:25:06,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:06,671 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:06,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:25:06,671 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-10-24 02:25:06,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:06,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003960871] [2020-10-24 02:25:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:06,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:06,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:12,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003960871] [2020-10-24 02:25:12,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-24 02:25:12,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281795659] [2020-10-24 02:25:12,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-24 02:25:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-24 02:25:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:25:12,014 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-10-24 02:25:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:17,777 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-10-24 02:25:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-24 02:25:17,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-10-24 02:25:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:17,780 INFO L225 Difference]: With dead ends: 265 [2020-10-24 02:25:17,783 INFO L226 Difference]: Without dead ends: 226 [2020-10-24 02:25:17,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-10-24 02:25:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-24 02:25:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-24 02:25:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-24 02:25:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-10-24 02:25:17,822 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-10-24 02:25:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-10-24 02:25:17,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-24 02:25:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-10-24 02:25:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-24 02:25:17,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:17,825 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:17,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:25:17,825 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-10-24 02:25:17,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:17,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583274346] [2020-10-24 02:25:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:23,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583274346] [2020-10-24 02:25:23,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:23,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-24 02:25:23,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057265182] [2020-10-24 02:25:23,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-24 02:25:23,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:23,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-24 02:25:23,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:25:23,599 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-10-24 02:25:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:29,609 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-10-24 02:25:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-24 02:25:29,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-10-24 02:25:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:29,613 INFO L225 Difference]: With dead ends: 271 [2020-10-24 02:25:29,613 INFO L226 Difference]: Without dead ends: 232 [2020-10-24 02:25:29,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-10-24 02:25:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-24 02:25:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-24 02:25:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-24 02:25:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-10-24 02:25:29,645 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-10-24 02:25:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:29,646 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-10-24 02:25:29,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-24 02:25:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-10-24 02:25:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-24 02:25:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:29,648 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:29,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:25:29,648 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-10-24 02:25:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:29,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427301023] [2020-10-24 02:25:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:35,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427301023] [2020-10-24 02:25:35,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:35,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-24 02:25:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090949294] [2020-10-24 02:25:35,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-24 02:25:35,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:35,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-24 02:25:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:25:35,473 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-10-24 02:25:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:41,853 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-10-24 02:25:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-24 02:25:41,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-10-24 02:25:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:41,856 INFO L225 Difference]: With dead ends: 277 [2020-10-24 02:25:41,857 INFO L226 Difference]: Without dead ends: 238 [2020-10-24 02:25:41,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-10-24 02:25:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-24 02:25:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-24 02:25:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-24 02:25:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-10-24 02:25:41,901 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-10-24 02:25:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:41,902 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-10-24 02:25:41,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-24 02:25:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-10-24 02:25:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-24 02:25:41,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:41,903 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:41,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:25:41,904 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-10-24 02:25:41,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:41,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406389494] [2020-10-24 02:25:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:48,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406389494] [2020-10-24 02:25:48,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:48,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-24 02:25:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081129817] [2020-10-24 02:25:48,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-24 02:25:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:48,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-24 02:25:48,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:25:48,013 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-10-24 02:25:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:54,476 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-10-24 02:25:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-24 02:25:54,478 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-10-24 02:25:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:54,480 INFO L225 Difference]: With dead ends: 283 [2020-10-24 02:25:54,480 INFO L226 Difference]: Without dead ends: 244 [2020-10-24 02:25:54,481 INFO L677 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 [2020-10-24 02:25:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-24 02:25:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-10-24 02:25:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-24 02:25:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-10-24 02:25:54,526 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-10-24 02:25:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:54,526 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-10-24 02:25:54,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-24 02:25:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-10-24 02:25:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-24 02:25:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:54,528 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:54,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:25:54,528 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-10-24 02:25:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296950882] [2020-10-24 02:25:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:54,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:54,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:26:01,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296950882] [2020-10-24 02:26:01,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:01,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-24 02:26:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591444287] [2020-10-24 02:26:01,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-24 02:26:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-24 02:26:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:26:01,115 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-10-24 02:26:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:08,487 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-10-24 02:26:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-24 02:26:08,488 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-10-24 02:26:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:08,490 INFO L225 Difference]: With dead ends: 289 [2020-10-24 02:26:08,490 INFO L226 Difference]: Without dead ends: 250 [2020-10-24 02:26:08,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-10-24 02:26:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-24 02:26:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-10-24 02:26:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-24 02:26:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-10-24 02:26:08,541 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-10-24 02:26:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:08,542 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-10-24 02:26:08,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-24 02:26:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-10-24 02:26:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-24 02:26:08,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:08,543 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:08,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:26:08,544 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-10-24 02:26:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:08,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405516236] [2020-10-24 02:26:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:08,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:26:15,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405516236] [2020-10-24 02:26:15,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:15,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-24 02:26:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265534122] [2020-10-24 02:26:15,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-24 02:26:15,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-24 02:26:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 02:26:15,466 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-10-24 02:26:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:23,129 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-10-24 02:26:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-24 02:26:23,130 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-10-24 02:26:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:23,132 INFO L225 Difference]: With dead ends: 295 [2020-10-24 02:26:23,132 INFO L226 Difference]: Without dead ends: 256 [2020-10-24 02:26:23,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-10-24 02:26:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-24 02:26:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-10-24 02:26:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-24 02:26:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-10-24 02:26:23,185 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-10-24 02:26:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:23,186 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-10-24 02:26:23,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-24 02:26:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-10-24 02:26:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-24 02:26:23,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:23,188 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:23,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:26:23,188 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-10-24 02:26:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:23,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674002475] [2020-10-24 02:26:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:23,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:26:30,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674002475] [2020-10-24 02:26:30,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:30,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-24 02:26:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105855153] [2020-10-24 02:26:30,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-24 02:26:30,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-24 02:26:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:26:30,593 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-10-24 02:26:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:39,475 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-10-24 02:26:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-24 02:26:39,476 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-10-24 02:26:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:39,478 INFO L225 Difference]: With dead ends: 301 [2020-10-24 02:26:39,478 INFO L226 Difference]: Without dead ends: 262 [2020-10-24 02:26:39,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-10-24 02:26:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-24 02:26:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-10-24 02:26:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-24 02:26:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-10-24 02:26:39,530 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-10-24 02:26:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:39,530 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-10-24 02:26:39,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-24 02:26:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-10-24 02:26:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-24 02:26:39,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:39,532 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:39,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:26:39,533 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-10-24 02:26:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:39,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735618750] [2020-10-24 02:26:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:39,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:26:47,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735618750] [2020-10-24 02:26:47,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:47,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-24 02:26:47,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776627806] [2020-10-24 02:26:47,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-24 02:26:47,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-24 02:26:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 02:26:47,571 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-10-24 02:26:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:57,312 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-10-24 02:26:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-24 02:26:57,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-10-24 02:26:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:57,316 INFO L225 Difference]: With dead ends: 307 [2020-10-24 02:26:57,316 INFO L226 Difference]: Without dead ends: 268 [2020-10-24 02:26:57,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-10-24 02:26:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-24 02:26:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-10-24 02:26:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-24 02:26:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-10-24 02:26:57,387 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-10-24 02:26:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:57,388 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-10-24 02:26:57,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-24 02:26:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-10-24 02:26:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-24 02:26:57,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:57,391 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:57,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:26:57,392 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-10-24 02:26:57,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:57,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467826314] [2020-10-24 02:26:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:57,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:27:06,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467826314] [2020-10-24 02:27:06,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:06,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-24 02:27:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618662624] [2020-10-24 02:27:06,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-24 02:27:06,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-24 02:27:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:27:06,033 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-10-24 02:27:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:15,568 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-10-24 02:27:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-10-24 02:27:15,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-10-24 02:27:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:15,571 INFO L225 Difference]: With dead ends: 313 [2020-10-24 02:27:15,571 INFO L226 Difference]: Without dead ends: 274 [2020-10-24 02:27:15,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-10-24 02:27:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-24 02:27:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-10-24 02:27:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-24 02:27:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-10-24 02:27:15,621 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-10-24 02:27:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:15,621 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-10-24 02:27:15,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-24 02:27:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-10-24 02:27:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-24 02:27:15,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:15,623 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:15,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:27:15,624 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:15,624 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-10-24 02:27:15,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:15,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51735395] [2020-10-24 02:27:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:15,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:15,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:27:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:27:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51735395] [2020-10-24 02:27:24,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:24,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-24 02:27:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751771960] [2020-10-24 02:27:24,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-24 02:27:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-24 02:27:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 02:27:24,946 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-10-24 02:27:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:35,890 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-10-24 02:27:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-10-24 02:27:35,892 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-10-24 02:27:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:35,894 INFO L225 Difference]: With dead ends: 319 [2020-10-24 02:27:35,894 INFO L226 Difference]: Without dead ends: 280 [2020-10-24 02:27:35,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:27:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-24 02:27:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-10-24 02:27:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-24 02:27:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-10-24 02:27:35,961 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-10-24 02:27:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:35,961 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-10-24 02:27:35,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-24 02:27:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-10-24 02:27:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-24 02:27:35,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:35,964 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:35,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:27:35,964 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-10-24 02:27:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:35,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248275419] [2020-10-24 02:27:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:36,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:36,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:27:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:27:46,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248275419] [2020-10-24 02:27:46,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:46,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-24 02:27:46,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797119012] [2020-10-24 02:27:46,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-24 02:27:46,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-24 02:27:46,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:27:46,032 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-10-24 02:27:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:57,666 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-10-24 02:27:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-24 02:27:57,668 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-10-24 02:27:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:57,670 INFO L225 Difference]: With dead ends: 325 [2020-10-24 02:27:57,670 INFO L226 Difference]: Without dead ends: 286 [2020-10-24 02:27:57,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-10-24 02:27:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-24 02:27:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-10-24 02:27:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-24 02:27:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-10-24 02:27:57,736 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-10-24 02:27:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:57,736 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-10-24 02:27:57,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-24 02:27:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-10-24 02:27:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-24 02:27:57,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:57,738 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:57,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:27:57,739 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-10-24 02:27:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:57,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893039553] [2020-10-24 02:27:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:57,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:27:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:28:09,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893039553] [2020-10-24 02:28:09,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:09,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-24 02:28:09,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931976352] [2020-10-24 02:28:09,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-24 02:28:09,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-24 02:28:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:28:09,047 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-10-24 02:28:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:22,289 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-10-24 02:28:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-10-24 02:28:22,291 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-10-24 02:28:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:22,293 INFO L225 Difference]: With dead ends: 331 [2020-10-24 02:28:22,294 INFO L226 Difference]: Without dead ends: 292 [2020-10-24 02:28:22,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-10-24 02:28:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-24 02:28:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-10-24 02:28:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-24 02:28:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-10-24 02:28:22,357 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-10-24 02:28:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:22,358 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-10-24 02:28:22,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-24 02:28:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-10-24 02:28:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-24 02:28:22,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:22,360 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:22,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:28:22,360 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-10-24 02:28:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498237393] [2020-10-24 02:28:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:22,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:22,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:28:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:28:34,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498237393] [2020-10-24 02:28:34,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:34,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-24 02:28:34,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3405202] [2020-10-24 02:28:34,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-24 02:28:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-24 02:28:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 02:28:34,476 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-10-24 02:28:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:48,093 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-10-24 02:28:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-24 02:28:48,095 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-10-24 02:28:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:48,098 INFO L225 Difference]: With dead ends: 337 [2020-10-24 02:28:48,098 INFO L226 Difference]: Without dead ends: 298 [2020-10-24 02:28:48,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-10-24 02:28:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-24 02:28:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-10-24 02:28:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-24 02:28:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-10-24 02:28:48,156 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-10-24 02:28:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:48,156 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-10-24 02:28:48,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-24 02:28:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-10-24 02:28:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-24 02:28:48,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:48,159 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:48,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:28:48,159 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-10-24 02:28:48,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:48,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867014161] [2020-10-24 02:28:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:48,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:48,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:28:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:29:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867014161] [2020-10-24 02:29:01,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:01,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-24 02:29:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156544609] [2020-10-24 02:29:01,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-24 02:29:01,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:01,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-24 02:29:01,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:29:01,810 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-10-24 02:29:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:16,928 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-10-24 02:29:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-10-24 02:29:16,931 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-10-24 02:29:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:16,933 INFO L225 Difference]: With dead ends: 343 [2020-10-24 02:29:16,933 INFO L226 Difference]: Without dead ends: 304 [2020-10-24 02:29:16,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-10-24 02:29:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-24 02:29:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-10-24 02:29:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-24 02:29:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-10-24 02:29:17,010 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-10-24 02:29:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:17,011 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-10-24 02:29:17,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-24 02:29:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-10-24 02:29:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-24 02:29:17,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:17,013 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:17,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:29:17,013 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-10-24 02:29:17,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494112554] [2020-10-24 02:29:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:29:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:29:32,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494112554] [2020-10-24 02:29:32,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:32,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-24 02:29:32,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464836357] [2020-10-24 02:29:32,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-24 02:29:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-24 02:29:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:29:32,634 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-10-24 02:29:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:50,017 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-10-24 02:29:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-10-24 02:29:50,019 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-10-24 02:29:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:50,021 INFO L225 Difference]: With dead ends: 349 [2020-10-24 02:29:50,022 INFO L226 Difference]: Without dead ends: 310 [2020-10-24 02:29:50,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-10-24 02:29:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-24 02:29:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-10-24 02:29:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-24 02:29:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-10-24 02:29:50,104 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-10-24 02:29:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-10-24 02:29:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-24 02:29:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-10-24 02:29:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-24 02:29:50,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:50,106 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:29:50,107 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-10-24 02:29:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:50,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312647229] [2020-10-24 02:29:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:50,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:50,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:29:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:30:08,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312647229] [2020-10-24 02:30:08,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:08,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-24 02:30:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559030201] [2020-10-24 02:30:08,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-24 02:30:08,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-24 02:30:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 02:30:08,321 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-10-24 02:30:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:27,737 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-10-24 02:30:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-24 02:30:27,740 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-10-24 02:30:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:27,742 INFO L225 Difference]: With dead ends: 355 [2020-10-24 02:30:27,742 INFO L226 Difference]: Without dead ends: 316 [2020-10-24 02:30:27,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:30:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-24 02:30:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-10-24 02:30:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-24 02:30:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-10-24 02:30:27,832 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-10-24 02:30:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:27,832 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-10-24 02:30:27,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-24 02:30:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-10-24 02:30:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-24 02:30:27,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:27,835 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:27,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:30:27,835 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-10-24 02:30:27,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:27,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879569242] [2020-10-24 02:30:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:28,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:30:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:28,761 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:30:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:30:49,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879569242] [2020-10-24 02:30:49,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:49,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-10-24 02:30:49,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748704295] [2020-10-24 02:30:49,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-24 02:30:49,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-24 02:30:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 02:30:49,074 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-10-24 02:31:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:14,144 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-10-24 02:31:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-10-24 02:31:14,148 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-10-24 02:31:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:14,151 INFO L225 Difference]: With dead ends: 361 [2020-10-24 02:31:14,151 INFO L226 Difference]: Without dead ends: 322 [2020-10-24 02:31:14,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-10-24 02:31:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-24 02:31:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-10-24 02:31:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:31:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-10-24 02:31:14,268 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-10-24 02:31:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:14,268 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-10-24 02:31:14,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-24 02:31:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-10-24 02:31:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-24 02:31:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:14,271 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:14,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:31:14,271 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-10-24 02:31:14,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:14,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405128369] [2020-10-24 02:31:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:31:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,879 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:15,029 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:15,179 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:16,772 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:31:39,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405128369] [2020-10-24 02:31:39,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:39,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-10-24 02:31:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166361109] [2020-10-24 02:31:39,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-24 02:31:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-24 02:31:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-10-24 02:31:39,480 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-10-24 02:31:41,139 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:32:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:08,717 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-10-24 02:32:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-10-24 02:32:08,722 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-10-24 02:32:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:08,724 INFO L225 Difference]: With dead ends: 367 [2020-10-24 02:32:08,724 INFO L226 Difference]: Without dead ends: 328 [2020-10-24 02:32:08,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-10-24 02:32:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-24 02:32:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-10-24 02:32:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-24 02:32:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-10-24 02:32:08,831 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-10-24 02:32:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:08,831 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-10-24 02:32:08,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-24 02:32:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-10-24 02:32:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-24 02:32:08,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:08,834 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:08,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:32:08,835 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-10-24 02:32:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:08,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318266967] [2020-10-24 02:32:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:32:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:12,610 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:18,262 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:24,214 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:27,950 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:32:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318266967] [2020-10-24 02:32:38,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:38,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-10-24 02:32:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037730204] [2020-10-24 02:32:38,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-24 02:32:38,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-24 02:32:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:32:38,961 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-10-24 02:32:41,249 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:33:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:14,481 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-10-24 02:33:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-10-24 02:33:14,486 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-10-24 02:33:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:14,489 INFO L225 Difference]: With dead ends: 373 [2020-10-24 02:33:14,489 INFO L226 Difference]: Without dead ends: 334 [2020-10-24 02:33:14,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-10-24 02:33:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-24 02:33:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-10-24 02:33:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-24 02:33:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-10-24 02:33:14,574 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-10-24 02:33:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:14,574 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-10-24 02:33:14,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-24 02:33:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-10-24 02:33:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-24 02:33:14,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:14,576 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:33:14,576 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-10-24 02:33:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:14,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139303162] [2020-10-24 02:33:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:14,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:33:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:15,245 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:15,396 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:15,696 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:15,855 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:16,177 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:16,521 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:16,695 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:16,884 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:17,077 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:17,472 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:17,681 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:17,895 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:18,122 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:18,346 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:18,574 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:18,819 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:19,062 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:19,309 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:20,082 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:20,351 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:20,627 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:20,907 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:21,191 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:21,778 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:22,084 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:22,720 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:23,040 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:23,701 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:24,041 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:24,731 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:25,084 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:25,433 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:25,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:26,166 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:26,539 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:26,922 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:27,311 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:27,703 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:28,104 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:28,505 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:28,909 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:29,338 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:30,153 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:30,577 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:31,016 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:31,895 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:32,353 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:32,808 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:33,270 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:34,203 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:34,672 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:35,156 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:35,643 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:36,149 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:37,166 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:37,689 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:38,222 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:38,761 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:39,308 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:39,852 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:40,412 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:40,963 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:41,528 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:42,098 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:42,672 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:43,274 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:43,842 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,479 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,105 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,721 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,348 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,986 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:48,628 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:49,277 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:49,936 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:33:50,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139303162] [2020-10-24 02:33:50,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:50,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-10-24 02:33:50,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307433371] [2020-10-24 02:33:50,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-10-24 02:33:50,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-10-24 02:33:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 02:33:50,523 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-10-24 02:33:51,234 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-24 02:33:51,553 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:34:24,528 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:34:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:28,308 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-10-24 02:34:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-10-24 02:34:28,314 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-10-24 02:34:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:28,316 INFO L225 Difference]: With dead ends: 379 [2020-10-24 02:34:28,316 INFO L226 Difference]: Without dead ends: 340 [2020-10-24 02:34:28,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-10-24 02:34:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-24 02:34:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-10-24 02:34:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:34:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-10-24 02:34:28,419 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-10-24 02:34:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:28,420 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-10-24 02:34:28,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-10-24 02:34:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-10-24 02:34:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-24 02:34:28,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:28,422 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:28,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:34:28,422 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-10-24 02:34:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:28,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413655039] [2020-10-24 02:34:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:28,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:34:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:29,063 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:29,207 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:29,373 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:29,541 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:29,713 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:29,893 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:30,077 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:30,263 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:30,459 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:30,656 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:30,863 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:31,077 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:31,298 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:31,520 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:31,753 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:31,993 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:32,235 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:32,482 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:32,742 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:33,030 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:33,293 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:33,562 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:33,847 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:34,135 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:34,426 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:34,726 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:35,042 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:35,345 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:35,658 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:35,948 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:36,277 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:36,611 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:36,955 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:37,303 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:37,654 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:38,011 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:38,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:38,765 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:39,152 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:39,523 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:39,924 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:40,334 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:40,764 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:41,176 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:41,605 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:42,033 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:42,465 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:42,898 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:43,349 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:43,799 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:44,274 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:44,726 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:45,204 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:45,676 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:46,163 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:46,634 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:47,118 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:47,608 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:48,122 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:48,636 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:49,159 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:49,678 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:50,214 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:50,747 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:51,287 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:51,825 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:52,377 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:53,447 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:54,031 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:54,623 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:55,218 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:55,845 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:56,448 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:57,052 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:57,672 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:58,297 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:58,938 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:59,567 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:00,202 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:00,860 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:01,518 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:02,188 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:02,873 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:03,564 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:04,265 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:04,955 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:05,640 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:06,349 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:07,062 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:08,333 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,073 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:35:09,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413655039] [2020-10-24 02:35:09,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:09,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-10-24 02:35:09,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774585059] [2020-10-24 02:35:09,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-10-24 02:35:09,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-10-24 02:35:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 02:35:09,693 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-10-24 02:35:10,650 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-24 02:35:11,468 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:35:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:54,216 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2020-10-24 02:35:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-10-24 02:35:54,222 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 325 [2020-10-24 02:35:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:54,224 INFO L225 Difference]: With dead ends: 385 [2020-10-24 02:35:54,224 INFO L226 Difference]: Without dead ends: 346 [2020-10-24 02:35:54,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-10-24 02:35:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-24 02:35:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-10-24 02:35:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-24 02:35:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-10-24 02:35:54,368 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-10-24 02:35:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:54,369 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-10-24 02:35:54,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-10-24 02:35:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-10-24 02:35:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-24 02:35:54,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:54,373 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:54,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:35:54,374 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:54,375 INFO L82 PathProgramCache]: Analyzing trace with hash 418165828, now seen corresponding path program 47 times [2020-10-24 02:35:54,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:54,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873633121] [2020-10-24 02:35:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:54,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:54,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:35:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:55,119 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:55,378 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:55,545 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:55,725 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:55,921 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:56,124 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:56,341 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:56,556 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:56,787 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:57,025 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:57,269 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:57,547 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:57,803 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:58,063 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:58,330 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:58,612 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:58,888 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:59,175 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:59,473 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:59,779 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:00,088 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:00,401 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:00,722 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:01,052 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:01,388 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:01,724 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:02,081 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:02,439 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:02,799 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:03,170 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:03,550 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:03,932 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:04,327 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:04,726 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:05,133 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:05,546 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:05,979 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:06,406 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:06,837 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:07,276 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:07,725 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:08,181 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:08,641 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:09,116 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:09,589 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:10,068 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:10,557 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:11,053 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:11,551 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:12,060 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:12,568 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:13,066 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:13,607 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:14,142 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:14,701 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:15,242 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:15,786 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:16,345 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:16,911 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:17,491 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:18,068 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:18,667 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:19,267 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:19,872 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:20,484 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:21,098 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:21,729 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:22,370 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:23,021 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:23,651 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:24,322 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:24,985 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:25,657 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:26,337 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:27,027 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:27,735 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:28,442 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:29,170 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:29,904 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:30,635 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:31,364 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:32,128 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:32,862 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:36:33,614 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12