/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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:11,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:11,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:11,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:11,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:11,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:11,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:11,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:11,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:11,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:11,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:11,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:11,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:11,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:11,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:11,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:11,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:11,856 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 02:23:11,870 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:11,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:11,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:11,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:11,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:11,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:11,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:11,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:11,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:11,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:11,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:11,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:11,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:11,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:11,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:11,875 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:11,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:11,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:11,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:11,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:11,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:11,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:11,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:12,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:12,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:12,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:12,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:12,326 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:12,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-24 02:23:12,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272485e83/a79ac490a8524be1ab704007911e648d/FLAGb6fc73dec [2020-10-24 02:23:13,174 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:13,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-24 02:23:13,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272485e83/a79ac490a8524be1ab704007911e648d/FLAGb6fc73dec [2020-10-24 02:23:13,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272485e83/a79ac490a8524be1ab704007911e648d [2020-10-24 02:23:13,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:13,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:13,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:13,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:13,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:13,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168a814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13, skipping insertion in model container [2020-10-24 02:23:13,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:13,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:13,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:13,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:13,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:13,917 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:13,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13 WrapperNode [2020-10-24 02:23:13,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:13,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:13,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:13,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:13,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (1/1) ... [2020-10-24 02:23:13,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:13,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:13,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:13,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:13,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (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 02:23:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-24 02:23:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-24 02:23:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:14,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:14,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:14,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:14,512 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:14,513 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:23:14,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:14 BoogieIcfgContainer [2020-10-24 02:23:14,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:14,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:14,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:14,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:14,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:13" (1/3) ... [2020-10-24 02:23:14,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f4a7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:14, skipping insertion in model container [2020-10-24 02:23:14,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:13" (2/3) ... [2020-10-24 02:23:14,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f4a7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:14, skipping insertion in model container [2020-10-24 02:23:14,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:14" (3/3) ... [2020-10-24 02:23:14,524 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-10-24 02:23:14,537 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:14,542 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:14,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:14,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:14,579 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:14,579 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:14,579 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:14,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:14,580 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:14,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:14,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-24 02:23:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:23:14,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:14,608 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 02:23:14,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-10-24 02:23:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:14,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620658675] [2020-10-24 02:23:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:14,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:14,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:14,999 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 02:23:15,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620658675] [2020-10-24 02:23:15,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:15,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514179924] [2020-10-24 02:23:15,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:15,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:15,027 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-24 02:23:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:15,357 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-24 02:23:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:23:15,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-24 02:23:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:15,371 INFO L225 Difference]: With dead ends: 121 [2020-10-24 02:23:15,371 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:23:15,375 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 02:23:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:23:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-24 02:23:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 02:23:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-24 02:23:15,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-10-24 02:23:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:15,436 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-24 02:23:15,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-24 02:23:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:23:15,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:15,438 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 02:23:15,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:15,439 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-10-24 02:23:15,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:15,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619880524] [2020-10-24 02:23:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:15,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:15,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:15,706 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 02:23:15,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619880524] [2020-10-24 02:23:15,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:15,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:23:15,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136888119] [2020-10-24 02:23:15,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:23:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:23:15,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:23:15,713 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-10-24 02:23:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:16,021 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-24 02:23:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:23:16,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 02:23:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:16,024 INFO L225 Difference]: With dead ends: 100 [2020-10-24 02:23:16,024 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 02:23:16,026 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 02:23:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 02:23:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-24 02:23:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-24 02:23:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-24 02:23:16,040 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-10-24 02:23:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:16,041 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-24 02:23:16,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:23:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-24 02:23:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 02:23:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:16,043 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 02:23:16,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:16,043 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-10-24 02:23:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:16,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906640126] [2020-10-24 02:23:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,248 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 02:23:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906640126] [2020-10-24 02:23:16,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:23:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816627091] [2020-10-24 02:23:16,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:23:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:23:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:23:16,252 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-10-24 02:23:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:16,605 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-24 02:23:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:23:16,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-24 02:23:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:16,608 INFO L225 Difference]: With dead ends: 109 [2020-10-24 02:23:16,608 INFO L226 Difference]: Without dead ends: 70 [2020-10-24 02:23:16,609 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 02:23:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-24 02:23:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-24 02:23:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:23:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-24 02:23:16,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-10-24 02:23:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:16,622 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-24 02:23:16,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:23:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-24 02:23:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 02:23:16,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:16,624 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 02:23:16,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:16,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:16,625 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-10-24 02:23:16,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:16,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662829662] [2020-10-24 02:23:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:16,894 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 02:23:16,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662829662] [2020-10-24 02:23:16,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:16,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:23:16,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554923206] [2020-10-24 02:23:16,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:23:16,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:23:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:23:16,898 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-10-24 02:23:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:17,354 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-10-24 02:23:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:23:17,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-24 02:23:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:17,358 INFO L225 Difference]: With dead ends: 115 [2020-10-24 02:23:17,358 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 02:23:17,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:23:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 02:23:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-24 02:23:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-24 02:23:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-24 02:23:17,377 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-10-24 02:23:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:17,377 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-24 02:23:17,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:23:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-24 02:23:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-24 02:23:17,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:17,379 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 02:23:17,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:23:17,380 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-10-24 02:23:17,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:17,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487441848] [2020-10-24 02:23:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:17,729 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 02:23:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487441848] [2020-10-24 02:23:17,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:17,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:23:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698721433] [2020-10-24 02:23:17,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:23:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:23:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:23:17,733 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-10-24 02:23:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:18,262 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-10-24 02:23:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:23:18,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-24 02:23:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:18,265 INFO L225 Difference]: With dead ends: 121 [2020-10-24 02:23:18,265 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:23:18,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:23:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:23:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-24 02:23:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 02:23:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-24 02:23:18,278 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-10-24 02:23:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:18,279 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-24 02:23:18,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:23:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-24 02:23:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:23:18,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:18,281 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 02:23:18,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:23:18,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:18,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-10-24 02:23:18,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:18,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453432462] [2020-10-24 02:23:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:18,727 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 02:23:18,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453432462] [2020-10-24 02:23:18,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:18,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:23:18,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369339933] [2020-10-24 02:23:18,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:23:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:18,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:23:18,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:23:18,743 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-10-24 02:23:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:19,425 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-10-24 02:23:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:23:19,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-24 02:23:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:19,428 INFO L225 Difference]: With dead ends: 127 [2020-10-24 02:23:19,429 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 02:23:19,430 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 02:23:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 02:23:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-24 02:23:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:23:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-24 02:23:19,452 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-10-24 02:23:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:19,453 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-24 02:23:19,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:23:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-24 02:23:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 02:23:19,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:19,457 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 02:23:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:23:19,458 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-10-24 02:23:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:19,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332723846] [2020-10-24 02:23:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:19,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,072 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 02:23:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332723846] [2020-10-24 02:23:20,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:20,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:23:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022414427] [2020-10-24 02:23:20,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:23:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:23:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:23:20,075 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-24 02:23:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:20,757 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-24 02:23:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:23:20,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-24 02:23:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:20,769 INFO L225 Difference]: With dead ends: 133 [2020-10-24 02:23:20,769 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 02:23:20,774 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 02:23:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 02:23:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-24 02:23:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-24 02:23:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-24 02:23:20,802 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-10-24 02:23:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:20,803 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-24 02:23:20,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:23:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-24 02:23:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-24 02:23:20,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:20,808 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 02:23:20,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:23:20,808 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-10-24 02:23:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907840611] [2020-10-24 02:23:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:20,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:21,509 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 02:23:21,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907840611] [2020-10-24 02:23:21,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:21,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:23:21,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280015920] [2020-10-24 02:23:21,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:23:21,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:21,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:23:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:23:21,514 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-10-24 02:23:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:22,306 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-10-24 02:23:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:23:22,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-24 02:23:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:22,309 INFO L225 Difference]: With dead ends: 139 [2020-10-24 02:23:22,309 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 02:23:22,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:23:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 02:23:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-24 02:23:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-24 02:23:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-24 02:23:22,333 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-10-24 02:23:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:22,333 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-24 02:23:22,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:23:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-24 02:23:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 02:23:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:22,341 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 02:23:22,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:23:22,343 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-10-24 02:23:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:22,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709820773] [2020-10-24 02:23:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:23,096 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 02:23:23,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709820773] [2020-10-24 02:23:23,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:23,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:23:23,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659795856] [2020-10-24 02:23:23,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:23:23,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:23:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:23:23,099 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-10-24 02:23:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:24,038 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-10-24 02:23:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 02:23:24,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-24 02:23:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:24,041 INFO L225 Difference]: With dead ends: 145 [2020-10-24 02:23:24,041 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 02:23:24,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:23:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 02:23:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-24 02:23:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-24 02:23:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-24 02:23:24,057 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-10-24 02:23:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:24,057 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-24 02:23:24,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:23:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-24 02:23:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 02:23:24,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:24,059 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 02:23:24,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:23:24,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-10-24 02:23:24,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:24,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770572888] [2020-10-24 02:23:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:24,987 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 02:23:24,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770572888] [2020-10-24 02:23:24,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:24,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:23:24,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70989143] [2020-10-24 02:23:24,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:23:24,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:23:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:23:24,990 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-10-24 02:23:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:26,093 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-10-24 02:23:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:23:26,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-24 02:23:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:26,095 INFO L225 Difference]: With dead ends: 151 [2020-10-24 02:23:26,095 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:23:26,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:23:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:23:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-24 02:23:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-24 02:23:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-24 02:23:26,116 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-10-24 02:23:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:26,116 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-24 02:23:26,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:23:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-24 02:23:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 02:23:26,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:26,118 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 02:23:26,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:23:26,118 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-10-24 02:23:26,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:26,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744333022] [2020-10-24 02:23:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:26,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:26,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:27,148 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 02:23:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744333022] [2020-10-24 02:23:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:27,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:23:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799172553] [2020-10-24 02:23:27,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:23:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:23:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:23:27,151 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-10-24 02:23:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:28,310 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-10-24 02:23:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 02:23:28,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-24 02:23:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:28,313 INFO L225 Difference]: With dead ends: 157 [2020-10-24 02:23:28,313 INFO L226 Difference]: Without dead ends: 118 [2020-10-24 02:23:28,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:23:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-24 02:23:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-24 02:23:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-24 02:23:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-24 02:23:28,330 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-10-24 02:23:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:28,331 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-24 02:23:28,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:23:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-24 02:23:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-24 02:23:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:28,332 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 02:23:28,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:23:28,333 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-10-24 02:23:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:28,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983886304] [2020-10-24 02:23:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:28,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:28,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:29,473 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 02:23:29,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983886304] [2020-10-24 02:23:29,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:23:29,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974824415] [2020-10-24 02:23:29,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:23:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:23:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:23:29,475 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-10-24 02:23:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:30,778 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-10-24 02:23:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:23:30,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-24 02:23:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:30,782 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:23:30,782 INFO L226 Difference]: Without dead ends: 124 [2020-10-24 02:23:30,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:23:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-24 02:23:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-24 02:23:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-24 02:23:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-24 02:23:30,800 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-10-24 02:23:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:30,805 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-24 02:23:30,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:23:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-24 02:23:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-24 02:23:30,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:30,811 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 02:23:30,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:23:30,811 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-10-24 02:23:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:30,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688330517] [2020-10-24 02:23:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:30,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:32,132 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 02:23:32,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688330517] [2020-10-24 02:23:32,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:32,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:23:32,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892707369] [2020-10-24 02:23:32,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:23:32,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:23:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:23:32,135 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-10-24 02:23:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:33,724 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-10-24 02:23:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 02:23:33,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-24 02:23:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:33,731 INFO L225 Difference]: With dead ends: 169 [2020-10-24 02:23:33,731 INFO L226 Difference]: Without dead ends: 130 [2020-10-24 02:23:33,732 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 02:23:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-24 02:23:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-24 02:23:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-24 02:23:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-24 02:23:33,746 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-10-24 02:23:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:33,747 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-24 02:23:33,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:23:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-24 02:23:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 02:23:33,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:33,748 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 02:23:33,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:23:33,749 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-10-24 02:23:33,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:33,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370862184] [2020-10-24 02:23:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:35,214 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 02:23:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370862184] [2020-10-24 02:23:35,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:35,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:23:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243425077] [2020-10-24 02:23:35,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:23:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:23:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:23:35,218 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-10-24 02:23:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:36,864 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-10-24 02:23:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 02:23:36,864 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 02:23:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:36,866 INFO L225 Difference]: With dead ends: 175 [2020-10-24 02:23:36,867 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 02:23:36,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:23:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 02:23:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-24 02:23:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-24 02:23:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-24 02:23:36,885 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-10-24 02:23:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:36,886 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-24 02:23:36,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 02:23:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-24 02:23:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-24 02:23:36,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:36,887 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 02:23:36,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:23:36,888 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-10-24 02:23:36,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:36,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362464650] [2020-10-24 02:23:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:36,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:36,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:38,477 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 02:23:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362464650] [2020-10-24 02:23:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:38,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:23:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940823710] [2020-10-24 02:23:38,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:23:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:23:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:23:38,480 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-10-24 02:23:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:40,399 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-10-24 02:23:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 02:23:40,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-24 02:23:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:40,402 INFO L225 Difference]: With dead ends: 181 [2020-10-24 02:23:40,402 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 02:23:40,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:23:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 02:23:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-24 02:23:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-24 02:23:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-24 02:23:40,419 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-10-24 02:23:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:40,420 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-24 02:23:40,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:23:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-24 02:23:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-24 02:23:40,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:40,422 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 02:23:40,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:23:40,422 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-10-24 02:23:40,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:40,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621858729] [2020-10-24 02:23:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:40,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:40,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:42,199 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 02:23:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621858729] [2020-10-24 02:23:42,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:42,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 02:23:42,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961312959] [2020-10-24 02:23:42,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 02:23:42,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 02:23:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:23:42,202 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-10-24 02:23:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:44,178 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-10-24 02:23:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-24 02:23:44,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-10-24 02:23:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:44,180 INFO L225 Difference]: With dead ends: 187 [2020-10-24 02:23:44,180 INFO L226 Difference]: Without dead ends: 148 [2020-10-24 02:23:44,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:23:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-24 02:23:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-24 02:23:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-24 02:23:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-24 02:23:44,195 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-10-24 02:23:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:44,196 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-24 02:23:44,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 02:23:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-24 02:23:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-24 02:23:44,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:44,198 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 02:23:44,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:23:44,198 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-10-24 02:23:44,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826718948] [2020-10-24 02:23:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:44,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:46,259 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 02:23:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826718948] [2020-10-24 02:23:46,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:46,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 02:23:46,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271732464] [2020-10-24 02:23:46,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 02:23:46,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:46,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 02:23:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:23:46,262 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-10-24 02:23:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:48,788 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-10-24 02:23:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-24 02:23:48,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-24 02:23:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:48,791 INFO L225 Difference]: With dead ends: 193 [2020-10-24 02:23:48,792 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 02:23:48,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:23:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 02:23:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-24 02:23:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-24 02:23:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-10-24 02:23:48,811 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-10-24 02:23:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:48,812 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-10-24 02:23:48,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 02:23:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-10-24 02:23:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-24 02:23:48,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:48,813 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 02:23:48,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:23:48,814 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:48,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-10-24 02:23:48,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:48,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556466994] [2020-10-24 02:23:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:48,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:48,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,886 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 02:23:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556466994] [2020-10-24 02:23:50,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:50,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 02:23:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026649669] [2020-10-24 02:23:50,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 02:23:50,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 02:23:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:23:50,888 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-10-24 02:23:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:53,600 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-10-24 02:23:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-24 02:23:53,601 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-10-24 02:23:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:53,602 INFO L225 Difference]: With dead ends: 199 [2020-10-24 02:23:53,602 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 02:23:53,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:23:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 02:23:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-24 02:23:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 02:23:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-24 02:23:53,638 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-10-24 02:23:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:53,639 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-24 02:23:53,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 02:23:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-24 02:23:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 02:23:53,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:53,641 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 02:23:53,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:23:53,641 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-10-24 02:23:53,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:53,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082731395] [2020-10-24 02:23:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:55,949 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 02:23:55,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082731395] [2020-10-24 02:23:55,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:23:55,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:23:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067463041] [2020-10-24 02:23:55,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:23:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:23:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:23:55,952 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-10-24 02:23:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:58,614 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-10-24 02:23:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-24 02:23:58,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-10-24 02:23:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:58,617 INFO L225 Difference]: With dead ends: 205 [2020-10-24 02:23:58,617 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:23:58,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:23:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:23:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-24 02:23:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-24 02:23:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-10-24 02:23:58,641 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-10-24 02:23:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:58,641 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-10-24 02:23:58,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:23:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-10-24 02:23:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-24 02:23:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:58,643 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 02:23:58,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:23:58,644 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-10-24 02:23:58,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:58,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961664271] [2020-10-24 02:23:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:58,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:23:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:01,274 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 02:24:01,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961664271] [2020-10-24 02:24:01,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:01,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 02:24:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036696172] [2020-10-24 02:24:01,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 02:24:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 02:24:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:24:01,277 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-10-24 02:24:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:04,075 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-10-24 02:24:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-24 02:24:04,076 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-10-24 02:24:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:04,078 INFO L225 Difference]: With dead ends: 211 [2020-10-24 02:24:04,078 INFO L226 Difference]: Without dead ends: 172 [2020-10-24 02:24:04,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:24:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-24 02:24:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-24 02:24:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-24 02:24:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-24 02:24:04,102 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-10-24 02:24:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-24 02:24:04,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 02:24:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-24 02:24:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-24 02:24:04,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:04,104 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 02:24:04,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:24:04,104 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-10-24 02:24:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:04,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003942699] [2020-10-24 02:24:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:06,902 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 02:24:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003942699] [2020-10-24 02:24:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:06,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 02:24:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824128638] [2020-10-24 02:24:06,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 02:24:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 02:24:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:24:06,905 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-10-24 02:24:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:10,072 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-10-24 02:24:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-24 02:24:10,073 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-10-24 02:24:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:10,075 INFO L225 Difference]: With dead ends: 217 [2020-10-24 02:24:10,075 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 02:24:10,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 02:24:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 02:24:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-24 02:24:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-24 02:24:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-10-24 02:24:10,104 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-10-24 02:24:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:10,104 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-10-24 02:24:10,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 02:24:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-10-24 02:24:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-24 02:24:10,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:10,106 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 02:24:10,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:24:10,106 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-10-24 02:24:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917275860] [2020-10-24 02:24:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:10,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:13,236 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 02:24:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917275860] [2020-10-24 02:24:13,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:13,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 02:24:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473583888] [2020-10-24 02:24:13,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 02:24:13,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 02:24:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:24:13,239 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-10-24 02:24:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:16,646 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-10-24 02:24:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-24 02:24:16,650 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-10-24 02:24:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:16,651 INFO L225 Difference]: With dead ends: 223 [2020-10-24 02:24:16,651 INFO L226 Difference]: Without dead ends: 184 [2020-10-24 02:24:16,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:24:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-24 02:24:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-24 02:24:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-24 02:24:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-10-24 02:24:16,671 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-10-24 02:24:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:16,672 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-10-24 02:24:16,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 02:24:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-10-24 02:24:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-24 02:24:16,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:16,673 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 02:24:16,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:24:16,673 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-10-24 02:24:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:16,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282122664] [2020-10-24 02:24:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:16,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:16,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:19,988 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 02:24:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282122664] [2020-10-24 02:24:19,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:19,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-24 02:24:19,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377695142] [2020-10-24 02:24:19,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 02:24:19,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 02:24:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:19,991 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-10-24 02:24:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:23,698 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-10-24 02:24:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-24 02:24:23,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-10-24 02:24:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:23,701 INFO L225 Difference]: With dead ends: 229 [2020-10-24 02:24:23,701 INFO L226 Difference]: Without dead ends: 190 [2020-10-24 02:24:23,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 02:24:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-24 02:24:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-24 02:24:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-24 02:24:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-24 02:24:23,730 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-10-24 02:24:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:23,730 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-24 02:24:23,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 02:24:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-24 02:24:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 02:24:23,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:23,731 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 02:24:23,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:24:23,731 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-10-24 02:24:23,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:23,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253812309] [2020-10-24 02:24:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:23,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:23,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:27,332 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 02:24:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253812309] [2020-10-24 02:24:27,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:27,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-24 02:24:27,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788235345] [2020-10-24 02:24:27,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-24 02:24:27,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-24 02:24:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:24:27,335 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-10-24 02:24:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:31,099 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-10-24 02:24:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-24 02:24:31,100 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-10-24 02:24:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:31,102 INFO L225 Difference]: With dead ends: 235 [2020-10-24 02:24:31,102 INFO L226 Difference]: Without dead ends: 196 [2020-10-24 02:24:31,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:24:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-24 02:24:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-24 02:24:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-24 02:24:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-10-24 02:24:31,126 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-10-24 02:24:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:31,127 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-10-24 02:24:31,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-24 02:24:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-10-24 02:24:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-24 02:24:31,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:31,128 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 02:24:31,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:24:31,128 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-10-24 02:24:31,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:31,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378842376] [2020-10-24 02:24:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:31,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,012 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 02:24:35,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378842376] [2020-10-24 02:24:35,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:35,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-24 02:24:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335823517] [2020-10-24 02:24:35,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 02:24:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 02:24:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:24:35,015 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-10-24 02:24:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:39,200 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-10-24 02:24:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-24 02:24:39,201 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-10-24 02:24:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:39,202 INFO L225 Difference]: With dead ends: 241 [2020-10-24 02:24:39,202 INFO L226 Difference]: Without dead ends: 202 [2020-10-24 02:24:39,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 02:24:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-24 02:24:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-10-24 02:24:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-24 02:24:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-24 02:24:39,237 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-10-24 02:24:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:39,238 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-24 02:24:39,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 02:24:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-24 02:24:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-24 02:24:39,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:39,239 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 02:24:39,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:24:39,240 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-10-24 02:24:39,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:39,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183107478] [2020-10-24 02:24:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:43,493 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 02:24:43,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183107478] [2020-10-24 02:24:43,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:43,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-24 02:24:43,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4037258] [2020-10-24 02:24:43,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-24 02:24:43,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-24 02:24:43,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:24:43,495 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-10-24 02:24:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:48,092 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-10-24 02:24:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-24 02:24:48,093 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-10-24 02:24:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:48,095 INFO L225 Difference]: With dead ends: 247 [2020-10-24 02:24:48,095 INFO L226 Difference]: Without dead ends: 208 [2020-10-24 02:24:48,097 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 02:24:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-24 02:24:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-24 02:24:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 02:24:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-10-24 02:24:48,132 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-10-24 02:24:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:48,132 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-10-24 02:24:48,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-24 02:24:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-10-24 02:24:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-24 02:24:48,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:48,134 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 02:24:48,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:24:48,134 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-10-24 02:24:48,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:48,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828332678] [2020-10-24 02:24:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:52,586 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 02:24:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828332678] [2020-10-24 02:24:52,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:52,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-24 02:24:52,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803582648] [2020-10-24 02:24:52,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-24 02:24:52,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-24 02:24:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:24:52,589 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-10-24 02:24:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:57,825 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-10-24 02:24:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-24 02:24:57,826 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-10-24 02:24:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:57,829 INFO L225 Difference]: With dead ends: 253 [2020-10-24 02:24:57,829 INFO L226 Difference]: Without dead ends: 214 [2020-10-24 02:24:57,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-10-24 02:24:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-24 02:24:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-24 02:24:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-24 02:24:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-10-24 02:24:57,859 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-10-24 02:24:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:57,859 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-10-24 02:24:57,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-24 02:24:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-10-24 02:24:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-24 02:24:57,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:57,861 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 02:24:57,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:24:57,861 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-10-24 02:24:57,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:57,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324490030] [2020-10-24 02:24:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:57,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:57,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:24:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:02,796 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 02:25:02,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324490030] [2020-10-24 02:25:02,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:02,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-24 02:25:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655238507] [2020-10-24 02:25:02,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-24 02:25:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-24 02:25:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:25:02,798 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-10-24 02:25:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:07,984 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-10-24 02:25:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-24 02:25:07,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-10-24 02:25:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:07,987 INFO L225 Difference]: With dead ends: 259 [2020-10-24 02:25:07,987 INFO L226 Difference]: Without dead ends: 220 [2020-10-24 02:25:07,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-10-24 02:25:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-24 02:25:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-24 02:25:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-24 02:25:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-10-24 02:25:08,031 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-10-24 02:25:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-10-24 02:25:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-24 02:25:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-10-24 02:25:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-24 02:25:08,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:08,033 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 02:25:08,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:25:08,034 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-10-24 02:25:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420580432] [2020-10-24 02:25:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:08,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,392 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 02:25:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420580432] [2020-10-24 02:25:13,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:13,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-24 02:25:13,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013411626] [2020-10-24 02:25:13,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-24 02:25:13,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:13,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-24 02:25:13,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:25:13,394 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-10-24 02:25:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:19,064 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-10-24 02:25:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-24 02:25:19,065 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-10-24 02:25:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:19,066 INFO L225 Difference]: With dead ends: 265 [2020-10-24 02:25:19,067 INFO L226 Difference]: Without dead ends: 226 [2020-10-24 02:25:19,068 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 02:25:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-24 02:25:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-24 02:25:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-24 02:25:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-10-24 02:25:19,107 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-10-24 02:25:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:19,107 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-10-24 02:25:19,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-24 02:25:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-10-24 02:25:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-24 02:25:19,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:19,109 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 02:25:19,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:25:19,109 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-10-24 02:25:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:19,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861550588] [2020-10-24 02:25:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,658 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 02:25:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861550588] [2020-10-24 02:25:24,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:24,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-24 02:25:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080832342] [2020-10-24 02:25:24,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-24 02:25:24,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-24 02:25:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:25:24,660 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-10-24 02:25:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:30,525 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-10-24 02:25:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-24 02:25:30,526 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-10-24 02:25:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:30,529 INFO L225 Difference]: With dead ends: 271 [2020-10-24 02:25:30,529 INFO L226 Difference]: Without dead ends: 232 [2020-10-24 02:25:30,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-10-24 02:25:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-24 02:25:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-24 02:25:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-24 02:25:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-10-24 02:25:30,573 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-10-24 02:25:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:30,573 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-10-24 02:25:30,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-24 02:25:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-10-24 02:25:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-24 02:25:30,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:30,575 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 02:25:30,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:25:30,575 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-10-24 02:25:30,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:30,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308837233] [2020-10-24 02:25:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:30,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:30,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:36,447 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 02:25:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308837233] [2020-10-24 02:25:36,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:36,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-24 02:25:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77686412] [2020-10-24 02:25:36,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-24 02:25:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-24 02:25:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:25:36,448 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-10-24 02:25:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:42,621 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-10-24 02:25:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-24 02:25:42,622 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-10-24 02:25:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:42,624 INFO L225 Difference]: With dead ends: 277 [2020-10-24 02:25:42,624 INFO L226 Difference]: Without dead ends: 238 [2020-10-24 02:25:42,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-10-24 02:25:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-24 02:25:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-24 02:25:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-24 02:25:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-10-24 02:25:42,656 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-10-24 02:25:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:42,656 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-10-24 02:25:42,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-24 02:25:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-10-24 02:25:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-24 02:25:42,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:42,658 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 02:25:42,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:25:42,658 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-10-24 02:25:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:42,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762623977] [2020-10-24 02:25:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:42,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:42,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:48,908 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 02:25:48,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762623977] [2020-10-24 02:25:48,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:48,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-24 02:25:48,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416295512] [2020-10-24 02:25:48,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-24 02:25:48,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-24 02:25:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:25:48,910 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-10-24 02:25:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:55,458 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-10-24 02:25:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-24 02:25:55,459 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-10-24 02:25:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:55,462 INFO L225 Difference]: With dead ends: 283 [2020-10-24 02:25:55,462 INFO L226 Difference]: Without dead ends: 244 [2020-10-24 02:25:55,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-10-24 02:25:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-24 02:25:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-10-24 02:25:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-24 02:25:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-10-24 02:25:55,508 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-10-24 02:25:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:55,508 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-10-24 02:25:55,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-24 02:25:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-10-24 02:25:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-24 02:25:55,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:55,510 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 02:25:55,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:25:55,510 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-10-24 02:25:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:55,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475846932] [2020-10-24 02:25:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:25:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:02,104 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 02:26:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475846932] [2020-10-24 02:26:02,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:02,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-24 02:26:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357682858] [2020-10-24 02:26:02,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-24 02:26:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-24 02:26:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:26:02,106 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-10-24 02:26:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:09,527 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-10-24 02:26:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-24 02:26:09,529 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-10-24 02:26:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:09,531 INFO L225 Difference]: With dead ends: 289 [2020-10-24 02:26:09,531 INFO L226 Difference]: Without dead ends: 250 [2020-10-24 02:26:09,532 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 02:26:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-24 02:26:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-10-24 02:26:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-24 02:26:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-10-24 02:26:09,581 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-10-24 02:26:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:09,582 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-10-24 02:26:09,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-24 02:26:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-10-24 02:26:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-24 02:26:09,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:09,584 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 02:26:09,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:26:09,584 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-10-24 02:26:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:09,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138095904] [2020-10-24 02:26:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:09,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:09,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:26:16,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138095904] [2020-10-24 02:26:16,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:16,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-24 02:26:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202914862] [2020-10-24 02:26:16,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-24 02:26:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-24 02:26:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 02:26:16,713 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-10-24 02:26:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:24,472 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-10-24 02:26:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-24 02:26:24,474 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-10-24 02:26:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:24,475 INFO L225 Difference]: With dead ends: 295 [2020-10-24 02:26:24,476 INFO L226 Difference]: Without dead ends: 256 [2020-10-24 02:26:24,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-10-24 02:26:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-24 02:26:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-10-24 02:26:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-24 02:26:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-10-24 02:26:24,527 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-10-24 02:26:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:24,527 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-10-24 02:26:24,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-24 02:26:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-10-24 02:26:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-24 02:26:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:24,529 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 02:26:24,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:26:24,529 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-10-24 02:26:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:24,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127604283] [2020-10-24 02:26:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:24,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:24,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:31,964 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 02:26:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127604283] [2020-10-24 02:26:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:31,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-24 02:26:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417918506] [2020-10-24 02:26:31,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-24 02:26:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-24 02:26:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:26:31,966 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-10-24 02:26:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:40,910 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-10-24 02:26:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-24 02:26:40,911 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-10-24 02:26:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:40,913 INFO L225 Difference]: With dead ends: 301 [2020-10-24 02:26:40,913 INFO L226 Difference]: Without dead ends: 262 [2020-10-24 02:26:40,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-10-24 02:26:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-24 02:26:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-10-24 02:26:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-24 02:26:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-10-24 02:26:40,967 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-10-24 02:26:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:40,967 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-10-24 02:26:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-24 02:26:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-10-24 02:26:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-24 02:26:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:40,969 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 02:26:40,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:26:40,970 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:40,970 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-10-24 02:26:40,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:40,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761588721] [2020-10-24 02:26:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:41,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:41,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:49,200 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 02:26:49,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761588721] [2020-10-24 02:26:49,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:49,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-24 02:26:49,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124468269] [2020-10-24 02:26:49,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-24 02:26:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-24 02:26:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 02:26:49,202 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-10-24 02:26:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:59,045 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-10-24 02:26:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-24 02:26:59,046 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-10-24 02:26:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:59,048 INFO L225 Difference]: With dead ends: 307 [2020-10-24 02:26:59,048 INFO L226 Difference]: Without dead ends: 268 [2020-10-24 02:26:59,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-10-24 02:26:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-24 02:26:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-10-24 02:26:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-24 02:26:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-10-24 02:26:59,116 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-10-24 02:26:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:59,117 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-10-24 02:26:59,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-24 02:26:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-10-24 02:26:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-24 02:26:59,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:59,119 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 02:26:59,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:26:59,119 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-10-24 02:26:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:59,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248609591] [2020-10-24 02:26:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:59,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:59,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:26:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:07,913 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 02:27:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248609591] [2020-10-24 02:27:07,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:07,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-24 02:27:07,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882332542] [2020-10-24 02:27:07,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-24 02:27:07,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-24 02:27:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:27:07,916 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-10-24 02:27:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:17,563 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-10-24 02:27:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-10-24 02:27:17,565 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-10-24 02:27:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:17,567 INFO L225 Difference]: With dead ends: 313 [2020-10-24 02:27:17,567 INFO L226 Difference]: Without dead ends: 274 [2020-10-24 02:27:17,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-10-24 02:27:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-24 02:27:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-10-24 02:27:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-24 02:27:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-10-24 02:27:17,613 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-10-24 02:27:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:17,613 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-10-24 02:27:17,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-24 02:27:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-10-24 02:27:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-24 02:27:17,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:17,616 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 02:27:17,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:27:17,616 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-10-24 02:27:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213297590] [2020-10-24 02:27:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:17,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:17,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:27:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:27,194 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 02:27:27,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213297590] [2020-10-24 02:27:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:27,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-24 02:27:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753212295] [2020-10-24 02:27:27,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-24 02:27:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-24 02:27:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 02:27:27,197 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-10-24 02:27:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:38,296 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-10-24 02:27:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-10-24 02:27:38,297 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-10-24 02:27:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:38,299 INFO L225 Difference]: With dead ends: 319 [2020-10-24 02:27:38,299 INFO L226 Difference]: Without dead ends: 280 [2020-10-24 02:27:38,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:27:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-24 02:27:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-10-24 02:27:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-24 02:27:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-10-24 02:27:38,363 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-10-24 02:27:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:38,363 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-10-24 02:27:38,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-24 02:27:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-10-24 02:27:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-24 02:27:38,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:38,365 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 02:27:38,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:27:38,365 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-10-24 02:27:38,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:38,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59597186] [2020-10-24 02:27:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:38,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:38,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:27:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:48,911 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 02:27:48,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59597186] [2020-10-24 02:27:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-24 02:27:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628109423] [2020-10-24 02:27:48,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-24 02:27:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-24 02:27:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:27:48,913 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-10-24 02:28:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:00,936 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-10-24 02:28:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-24 02:28:00,937 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-10-24 02:28:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:00,939 INFO L225 Difference]: With dead ends: 325 [2020-10-24 02:28:00,939 INFO L226 Difference]: Without dead ends: 286 [2020-10-24 02:28:00,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-10-24 02:28:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-24 02:28:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-10-24 02:28:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-24 02:28:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-10-24 02:28:01,002 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-10-24 02:28:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:01,003 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-10-24 02:28:01,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-24 02:28:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-10-24 02:28:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-24 02:28:01,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:01,005 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 02:28:01,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:28:01,005 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:01,006 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-10-24 02:28:01,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:01,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833527578] [2020-10-24 02:28:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:01,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:28:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:12,478 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 02:28:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833527578] [2020-10-24 02:28:12,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:12,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-24 02:28:12,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107114043] [2020-10-24 02:28:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-24 02:28:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-24 02:28:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:28:12,481 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-10-24 02:28:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:26,092 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-10-24 02:28:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-10-24 02:28:26,094 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-10-24 02:28:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:26,097 INFO L225 Difference]: With dead ends: 331 [2020-10-24 02:28:26,097 INFO L226 Difference]: Without dead ends: 292 [2020-10-24 02:28:26,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-10-24 02:28:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-24 02:28:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-10-24 02:28:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-24 02:28:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-10-24 02:28:26,189 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-10-24 02:28:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:26,189 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-10-24 02:28:26,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-24 02:28:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-10-24 02:28:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-24 02:28:26,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:26,192 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 02:28:26,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:28:26,192 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-10-24 02:28:26,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:26,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582717634] [2020-10-24 02:28:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:26,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:28:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:38,788 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 02:28:38,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582717634] [2020-10-24 02:28:38,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:38,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-24 02:28:38,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238767750] [2020-10-24 02:28:38,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-24 02:28:38,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-24 02:28:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 02:28:38,791 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-10-24 02:28:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:53,037 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-10-24 02:28:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-24 02:28:53,039 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-10-24 02:28:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:53,041 INFO L225 Difference]: With dead ends: 337 [2020-10-24 02:28:53,041 INFO L226 Difference]: Without dead ends: 298 [2020-10-24 02:28:53,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-10-24 02:28:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-24 02:28:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-10-24 02:28:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-24 02:28:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-10-24 02:28:53,132 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-10-24 02:28:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:53,133 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-10-24 02:28:53,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-24 02:28:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-10-24 02:28:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-24 02:28:53,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:53,135 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 02:28:53,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:28:53,135 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-10-24 02:28:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:53,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482649424] [2020-10-24 02:28:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:53,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:28:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,195 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 02:29:07,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482649424] [2020-10-24 02:29:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-24 02:29:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106722544] [2020-10-24 02:29:07,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-24 02:29:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-24 02:29:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:29:07,197 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-10-24 02:29:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,178 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-10-24 02:29:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-10-24 02:29:23,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-10-24 02:29:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,183 INFO L225 Difference]: With dead ends: 343 [2020-10-24 02:29:23,184 INFO L226 Difference]: Without dead ends: 304 [2020-10-24 02:29:23,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-10-24 02:29:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-24 02:29:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-10-24 02:29:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-24 02:29:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-10-24 02:29:23,264 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-10-24 02:29:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-10-24 02:29:23,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-24 02:29:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-10-24 02:29:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-24 02:29:23,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,267 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 02:29:23,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:29:23,267 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-10-24 02:29:23,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12525440] [2020-10-24 02:29:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:29:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:39,750 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 02:29:39,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12525440] [2020-10-24 02:29:39,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:39,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-24 02:29:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752874088] [2020-10-24 02:29:39,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-24 02:29:39,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-24 02:29:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:29:39,753 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-10-24 02:29:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:58,183 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-10-24 02:29:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-10-24 02:29:58,186 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-10-24 02:29:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:58,188 INFO L225 Difference]: With dead ends: 349 [2020-10-24 02:29:58,188 INFO L226 Difference]: Without dead ends: 310 [2020-10-24 02:29:58,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-10-24 02:29:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-24 02:29:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-10-24 02:29:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-24 02:29:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-10-24 02:29:58,277 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-10-24 02:29:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:58,277 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-10-24 02:29:58,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-24 02:29:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-10-24 02:29:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-24 02:29:58,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:58,280 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 02:29:58,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:29:58,280 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-10-24 02:29:58,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:58,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103788616] [2020-10-24 02:29:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:58,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:58,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:29:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:17,527 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 02:30:17,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103788616] [2020-10-24 02:30:17,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:17,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-24 02:30:17,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622903068] [2020-10-24 02:30:17,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-24 02:30:17,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-24 02:30:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 02:30:17,530 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-10-24 02:30:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:38,135 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-10-24 02:30:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-24 02:30:38,139 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-10-24 02:30:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:38,141 INFO L225 Difference]: With dead ends: 355 [2020-10-24 02:30:38,141 INFO L226 Difference]: Without dead ends: 316 [2020-10-24 02:30:38,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:30:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-24 02:30:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-10-24 02:30:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-24 02:30:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-10-24 02:30:38,211 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-10-24 02:30:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:38,212 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-10-24 02:30:38,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-24 02:30:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-10-24 02:30:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-24 02:30:38,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:38,214 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 02:30:38,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:30:38,215 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-10-24 02:30:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:38,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702004915] [2020-10-24 02:30:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:38,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:38,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:30:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:01,510 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 02:31:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702004915] [2020-10-24 02:31:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:01,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-10-24 02:31:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389239319] [2020-10-24 02:31:01,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-24 02:31:01,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-24 02:31:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 02:31:01,512 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-10-24 02:31:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:28,980 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-10-24 02:31:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-10-24 02:31:28,984 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-10-24 02:31:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:28,987 INFO L225 Difference]: With dead ends: 361 [2020-10-24 02:31:28,987 INFO L226 Difference]: Without dead ends: 322 [2020-10-24 02:31:28,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-10-24 02:31:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-24 02:31:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-10-24 02:31:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:31:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-10-24 02:31:29,093 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-10-24 02:31:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:29,093 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-10-24 02:31:29,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-24 02:31:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-10-24 02:31:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-24 02:31:29,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:29,096 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 02:31:29,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:31:29,096 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-10-24 02:31:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:29,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333875747] [2020-10-24 02:31:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:29,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:29,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:31:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:45,571 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:55,901 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:31:57,499 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 02:31:57,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333875747] [2020-10-24 02:31:57,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:57,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-10-24 02:31:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340963887] [2020-10-24 02:31:57,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-24 02:31:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-24 02:31:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-10-24 02:31:57,503 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-10-24 02:31:59,463 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:32:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:29,887 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-10-24 02:32:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-10-24 02:32:29,891 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-10-24 02:32:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:29,894 INFO L225 Difference]: With dead ends: 367 [2020-10-24 02:32:29,894 INFO L226 Difference]: Without dead ends: 328 [2020-10-24 02:32:29,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-10-24 02:32:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-24 02:32:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-10-24 02:32:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-24 02:32:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-10-24 02:32:30,008 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-10-24 02:32:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:30,009 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-10-24 02:32:30,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-24 02:32:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-10-24 02:32:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-24 02:32:30,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:30,012 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 02:32:30,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:32:30,013 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-10-24 02:32:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:30,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420200090] [2020-10-24 02:32:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:30,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:32:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:30,711 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:30,853 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,001 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,157 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,318 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,485 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,656 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:31,830 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,010 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,390 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,579 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,783 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:32,994 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:33,207 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:33,425 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:33,654 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:33,885 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:34,124 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:34,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:34,616 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:34,865 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:35,124 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:35,388 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:35,663 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:35,938 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:36,236 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:36,516 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:36,805 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:37,106 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:37,414 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:37,722 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:38,038 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:38,359 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:39,180 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:39,856 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:40,208 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:40,561 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:40,924 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:41,675 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:42,435 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:42,828 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:43,225 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:43,618 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:44,010 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:44,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:45,194 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:45,630 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:46,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:46,508 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:46,953 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:47,423 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:47,882 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:48,344 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:48,812 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:49,280 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:49,768 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:50,240 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:50,726 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:51,218 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:51,713 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:52,212 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:52,730 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:53,263 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:53,776 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:54,307 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:54,837 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:55,373 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:55,912 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:56,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:57,014 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:57,564 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:58,149 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:58,737 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:59,316 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:32:59,892 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:00,488 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:01,076 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:01,671 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:02,287 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:02,905 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:03,520 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:04,146 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:04,682 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 02:33:04,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420200090] [2020-10-24 02:33:04,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:04,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-10-24 02:33:04,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152905869] [2020-10-24 02:33:04,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-24 02:33:04,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-24 02:33:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:33:04,685 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-10-24 02:33:07,264 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:33:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:44,130 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-10-24 02:33:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-10-24 02:33:44,135 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-10-24 02:33:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:44,137 INFO L225 Difference]: With dead ends: 373 [2020-10-24 02:33:44,137 INFO L226 Difference]: Without dead ends: 334 [2020-10-24 02:33:44,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 66.9s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-10-24 02:33:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-24 02:33:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-10-24 02:33:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-24 02:33:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-10-24 02:33:44,257 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-10-24 02:33:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:44,258 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-10-24 02:33:44,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-24 02:33:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-10-24 02:33:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-24 02:33:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:44,261 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 02:33:44,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:33:44,262 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-10-24 02:33:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7675054] [2020-10-24 02:33:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:44,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:44,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:33:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:45,042 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,208 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,377 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,547 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,726 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:45,915 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,104 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,316 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,525 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,739 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:46,958 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,180 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,414 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,653 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:47,891 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:48,145 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:48,406 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:48,673 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:48,938 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:49,213 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:49,499 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:49,785 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:50,772 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:51,083 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:51,396 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:51,721 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:52,099 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:52,441 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:52,788 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:53,147 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:53,503 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:53,856 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:54,227 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:54,601 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:54,989 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:55,384 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:55,770 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:56,185 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:56,588 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:57,006 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:57,428 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:57,838 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:58,289 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:58,739 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:59,203 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:33:59,668 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:00,455 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:00,947 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:01,448 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:01,951 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:02,460 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:02,976 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:03,504 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:04,026 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:04,583 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:05,117 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:05,649 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:06,203 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:06,764 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:07,347 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:07,930 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:08,518 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:09,117 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:09,720 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:10,334 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:10,963 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:11,581 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:12,205 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:12,829 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:13,466 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:14,110 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:14,761 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:15,423 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:16,089 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:16,755 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:17,453 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:18,142 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:18,835 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:19,539 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:20,855 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:21,578 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:22,295 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:23,019 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:23,772 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:24,507 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:25,265 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:34:25,827 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 02:34:25,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7675054] [2020-10-24 02:34:25,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:25,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-10-24 02:34:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514760333] [2020-10-24 02:34:25,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-10-24 02:34:25,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-10-24 02:34:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 02:34:25,831 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-10-24 02:34:26,652 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-24 02:34:27,021 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:34:49,904 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:35:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:07,425 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-10-24 02:35:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-10-24 02:35:07,431 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-10-24 02:35:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:07,434 INFO L225 Difference]: With dead ends: 379 [2020-10-24 02:35:07,434 INFO L226 Difference]: Without dead ends: 340 [2020-10-24 02:35:07,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-10-24 02:35:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-24 02:35:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-10-24 02:35:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:35:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-10-24 02:35:07,551 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-10-24 02:35:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:07,552 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-10-24 02:35:07,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-10-24 02:35:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-10-24 02:35:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-24 02:35:07,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:07,555 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 02:35:07,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:35:07,556 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-10-24 02:35:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:07,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888575086] [2020-10-24 02:35:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:07,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:07,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:35:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:08,543 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:08,794 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,047 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,249 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,448 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,649 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:09,851 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:10,073 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:10,302 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:10,528 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:10,780 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:11,040 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:11,304 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:11,596 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:11,877 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:12,157 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:12,454 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:12,754 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:13,062 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:13,371 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:13,693 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:14,014 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:14,251 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:14,598 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:14,954 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:15,308 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:15,655 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:16,025 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:16,403 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:16,784 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:17,171 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:17,552 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:17,969 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:18,374 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:18,783 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:19,199 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:19,620 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:20,048 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:20,487 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:20,935 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:21,387 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:21,850 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:22,305 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:22,775 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:23,256 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:23,734 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:24,229 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:24,743 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:25,248 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:25,767 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:26,291 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:26,810 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:27,343 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:27,887 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:28,441 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:28,990 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:29,558 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:30,137 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:30,718 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:31,318 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:31,915 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:32,522 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:33,135 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:33,749 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:34,373 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:35,012 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:35,640 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:36,293 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:36,959 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:37,645 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:38,313 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:38,984 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:39,667 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:40,357 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:41,067 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:41,769 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:42,488 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:43,210 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:43,932 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:44,669 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:45,430 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:46,197 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:46,965 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:47,737 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:48,510 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:49,300 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:49,955 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:50,809 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:51,649 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:52,500 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:53,346 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:54,175 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:54,854 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-24 02:35:55,436 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 02:35:55,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888575086] [2020-10-24 02:35:55,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:55,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-10-24 02:35:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84449079] [2020-10-24 02:35:55,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-10-24 02:35:55,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-10-24 02:35:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 02:35:55,442 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-10-24 02:35:55,577 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 02:35:56,585 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-24 02:35:57,526 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:36:01,551 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-24 02:36:07,205 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:36:12,330 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:36:13,273 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:36:14,364 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-24 02:36:23,066 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 16