/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:22,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:22,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:22,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:22,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:22,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:22,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:22,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:22,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:22,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:22,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:22,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:22,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:22,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:22,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:22,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:22,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:22,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:24:22,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:24:22,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:24:22,450 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 02:24:22,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:22,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:22,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:22,479 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:22,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:22,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:22,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:22,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:22,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:22,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:22,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:22,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:22,482 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:22,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:22,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:22,483 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:22,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:22,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:22,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:22,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:22,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:22,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:22,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:22,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:22,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:22,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:22,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:22,943 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:22,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-10-24 02:24:23,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8cab2fe/265b30cd4f0240e59296e9ed2b043802/FLAGb1855e163 [2020-10-24 02:24:23,699 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:23,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-10-24 02:24:23,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8cab2fe/265b30cd4f0240e59296e9ed2b043802/FLAGb1855e163 [2020-10-24 02:24:23,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8cab2fe/265b30cd4f0240e59296e9ed2b043802 [2020-10-24 02:24:23,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:24,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:24,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:24,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:24,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:24,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:23" (1/1) ... [2020-10-24 02:24:24,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23fa71e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24, skipping insertion in model container [2020-10-24 02:24:24,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:23" (1/1) ... [2020-10-24 02:24:24,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:24,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:24,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:24,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:24,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:24,388 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:24,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24 WrapperNode [2020-10-24 02:24:24,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:24,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:24,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:24,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:24,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (1/1) ... [2020-10-24 02:24:24,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:24,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:24,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:24,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:24,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (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 02:24:24,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:24,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:24,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:24,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-24 02:24:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:25,150 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:25,150 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:24:25,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:25 BoogieIcfgContainer [2020-10-24 02:24:25,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:25,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:25,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:25,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:25,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:23" (1/3) ... [2020-10-24 02:24:25,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ead2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:25, skipping insertion in model container [2020-10-24 02:24:25,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:24" (2/3) ... [2020-10-24 02:24:25,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ead2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:25, skipping insertion in model container [2020-10-24 02:24:25,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:25" (3/3) ... [2020-10-24 02:24:25,172 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-10-24 02:24:25,187 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:25,194 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:25,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:25,249 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:25,249 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:25,250 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:25,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:25,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:25,250 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:25,250 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:25,251 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-24 02:24:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-24 02:24:25,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:25,287 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] [2020-10-24 02:24:25,287 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1977025665, now seen corresponding path program 1 times [2020-10-24 02:24:25,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615428770] [2020-10-24 02:24:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:25,691 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 02:24:25,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615428770] [2020-10-24 02:24:25,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:25,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:24:25,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346556360] [2020-10-24 02:24:25,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:24:25,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:24:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:25,722 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-24 02:24:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:25,985 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-24 02:24:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:24:25,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-24 02:24:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:25,998 INFO L225 Difference]: With dead ends: 107 [2020-10-24 02:24:25,998 INFO L226 Difference]: Without dead ends: 61 [2020-10-24 02:24:26,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-24 02:24:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-10-24 02:24:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-24 02:24:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-24 02:24:26,056 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2020-10-24 02:24:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:26,057 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-24 02:24:26,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:24:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-24 02:24:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-24 02:24:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:26,059 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] [2020-10-24 02:24:26,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:26,059 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1975744652, now seen corresponding path program 1 times [2020-10-24 02:24:26,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:26,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713010046] [2020-10-24 02:24:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:26,293 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 02:24:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713010046] [2020-10-24 02:24:26,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:26,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:24:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001407984] [2020-10-24 02:24:26,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:24:26,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:24:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:24:26,298 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2020-10-24 02:24:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:26,633 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-10-24 02:24:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:26,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-24 02:24:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:26,636 INFO L225 Difference]: With dead ends: 94 [2020-10-24 02:24:26,637 INFO L226 Difference]: Without dead ends: 90 [2020-10-24 02:24:26,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:24:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-24 02:24:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2020-10-24 02:24:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:24:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-24 02:24:26,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-10-24 02:24:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:26,653 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-24 02:24:26,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:24:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-24 02:24:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:24:26,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:26,654 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] [2020-10-24 02:24:26,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:26,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1044572084, now seen corresponding path program 1 times [2020-10-24 02:24:26,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:26,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997437877] [2020-10-24 02:24:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:26,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:26,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997437877] [2020-10-24 02:24:26,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:26,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:24:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555791122] [2020-10-24 02:24:26,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:24:26,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:24:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:24:26,798 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-10-24 02:24:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:27,153 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-24 02:24:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:27,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-24 02:24:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:27,156 INFO L225 Difference]: With dead ends: 106 [2020-10-24 02:24:27,156 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 02:24:27,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:24:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 02:24:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2020-10-24 02:24:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 02:24:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-24 02:24:27,169 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 32 [2020-10-24 02:24:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:27,170 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-24 02:24:27,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:24:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-24 02:24:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 02:24:27,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:27,172 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] [2020-10-24 02:24:27,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:27,172 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2007761789, now seen corresponding path program 1 times [2020-10-24 02:24:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:27,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806392671] [2020-10-24 02:24:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:27,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:27,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806392671] [2020-10-24 02:24:27,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:27,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:24:27,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552455965] [2020-10-24 02:24:27,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:24:27,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:24:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:24:27,355 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 4 states. [2020-10-24 02:24:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:27,545 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-24 02:24:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:27,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-24 02:24:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:27,547 INFO L225 Difference]: With dead ends: 86 [2020-10-24 02:24:27,547 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:24:27,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:24:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:24:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-24 02:24:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-24 02:24:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-24 02:24:27,557 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 38 [2020-10-24 02:24:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:27,557 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-24 02:24:27,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:24:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-24 02:24:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:24:27,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:27,559 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, 1, 1, 1, 1, 1] [2020-10-24 02:24:27,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:24:27,560 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1905643360, now seen corresponding path program 1 times [2020-10-24 02:24:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:27,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575348066] [2020-10-24 02:24:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:27,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575348066] [2020-10-24 02:24:27,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:27,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:24:27,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692224394] [2020-10-24 02:24:27,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:27,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:27,852 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 6 states. [2020-10-24 02:24:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:28,158 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-10-24 02:24:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:24:28,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-24 02:24:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:28,160 INFO L225 Difference]: With dead ends: 96 [2020-10-24 02:24:28,160 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:24:28,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:24:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:24:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-10-24 02:24:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:24:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-24 02:24:28,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-10-24 02:24:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:28,173 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-24 02:24:28,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-24 02:24:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-24 02:24:28,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:28,176 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-24 02:24:28,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:24:28,176 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1738519261, now seen corresponding path program 2 times [2020-10-24 02:24:28,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:28,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535594237] [2020-10-24 02:24:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:28,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535594237] [2020-10-24 02:24:28,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:28,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:24:28,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029744692] [2020-10-24 02:24:28,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:24:28,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:28,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:24:28,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:28,437 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 8 states. [2020-10-24 02:24:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:28,777 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-10-24 02:24:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:24:28,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-24 02:24:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:28,780 INFO L225 Difference]: With dead ends: 114 [2020-10-24 02:24:28,780 INFO L226 Difference]: Without dead ends: 80 [2020-10-24 02:24:28,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:24:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-24 02:24:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-24 02:24:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:24:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-24 02:24:28,795 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 56 [2020-10-24 02:24:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:28,795 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-24 02:24:28,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:24:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-24 02:24:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-24 02:24:28,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:28,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:28,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:24:28,797 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1830720512, now seen corresponding path program 3 times [2020-10-24 02:24:28,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:28,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691815147] [2020-10-24 02:24:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:29,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691815147] [2020-10-24 02:24:29,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:29,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:24:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137649592] [2020-10-24 02:24:29,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:24:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:24:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:29,124 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 10 states. [2020-10-24 02:24:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:29,585 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-10-24 02:24:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:24:29,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-24 02:24:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:29,587 INFO L225 Difference]: With dead ends: 132 [2020-10-24 02:24:29,588 INFO L226 Difference]: Without dead ends: 89 [2020-10-24 02:24:29,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-24 02:24:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-24 02:24:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-24 02:24:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-24 02:24:29,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 65 [2020-10-24 02:24:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:29,624 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-24 02:24:29,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:24:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-24 02:24:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-24 02:24:29,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:29,626 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:29,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:24:29,626 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -108377539, now seen corresponding path program 4 times [2020-10-24 02:24:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:29,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340843985] [2020-10-24 02:24:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:29,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340843985] [2020-10-24 02:24:29,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:29,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89514014] [2020-10-24 02:24:29,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:29,920 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 12 states. [2020-10-24 02:24:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:30,458 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2020-10-24 02:24:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:24:30,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-10-24 02:24:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:30,461 INFO L225 Difference]: With dead ends: 150 [2020-10-24 02:24:30,461 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 02:24:30,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:24:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 02:24:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-10-24 02:24:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:24:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-24 02:24:30,481 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2020-10-24 02:24:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:30,483 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-24 02:24:30,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-24 02:24:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-24 02:24:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:30,489 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:30,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:24:30,489 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1971003552, now seen corresponding path program 5 times [2020-10-24 02:24:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:30,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513955523] [2020-10-24 02:24:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:30,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513955523] [2020-10-24 02:24:30,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:30,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:24:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682250194] [2020-10-24 02:24:30,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:24:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:24:30,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:24:30,966 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 14 states. [2020-10-24 02:24:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:31,661 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2020-10-24 02:24:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:24:31,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-24 02:24:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:31,664 INFO L225 Difference]: With dead ends: 168 [2020-10-24 02:24:31,664 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 02:24:31,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:24:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 02:24:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2020-10-24 02:24:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 02:24:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-24 02:24:31,680 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 83 [2020-10-24 02:24:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:31,680 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-24 02:24:31,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:24:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-24 02:24:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 02:24:31,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:31,686 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:31,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:24:31,687 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1149356445, now seen corresponding path program 6 times [2020-10-24 02:24:31,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:31,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533916916] [2020-10-24 02:24:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:32,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533916916] [2020-10-24 02:24:32,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:32,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:24:32,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511725207] [2020-10-24 02:24:32,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:24:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:32,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:24:32,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:24:32,085 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 16 states. [2020-10-24 02:24:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:32,978 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2020-10-24 02:24:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 02:24:32,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-10-24 02:24:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:32,980 INFO L225 Difference]: With dead ends: 186 [2020-10-24 02:24:32,980 INFO L226 Difference]: Without dead ends: 116 [2020-10-24 02:24:32,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:24:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-24 02:24:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-24 02:24:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-24 02:24:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-24 02:24:33,007 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 92 [2020-10-24 02:24:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:33,007 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-24 02:24:33,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:24:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-24 02:24:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-24 02:24:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:33,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:33,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:24:33,013 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1693651648, now seen corresponding path program 7 times [2020-10-24 02:24:33,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:33,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841147302] [2020-10-24 02:24:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:33,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841147302] [2020-10-24 02:24:33,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:33,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:24:33,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238244980] [2020-10-24 02:24:33,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:24:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:24:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:24:33,514 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 18 states. [2020-10-24 02:24:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:34,556 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2020-10-24 02:24:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:24:34,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-10-24 02:24:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:34,558 INFO L225 Difference]: With dead ends: 204 [2020-10-24 02:24:34,558 INFO L226 Difference]: Without dead ends: 125 [2020-10-24 02:24:34,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:24:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-24 02:24:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2020-10-24 02:24:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 02:24:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-24 02:24:34,572 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 101 [2020-10-24 02:24:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,572 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-24 02:24:34,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:24:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-24 02:24:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 02:24:34,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,574 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:34,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:24:34,574 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:34,575 INFO L82 PathProgramCache]: Analyzing trace with hash 102510845, now seen corresponding path program 8 times [2020-10-24 02:24:34,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:34,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837980676] [2020-10-24 02:24:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:35,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837980676] [2020-10-24 02:24:35,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:35,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:24:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743927142] [2020-10-24 02:24:35,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:24:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:24:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:24:35,100 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 20 states. [2020-10-24 02:24:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:36,346 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2020-10-24 02:24:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-24 02:24:36,348 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2020-10-24 02:24:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:36,349 INFO L225 Difference]: With dead ends: 222 [2020-10-24 02:24:36,349 INFO L226 Difference]: Without dead ends: 134 [2020-10-24 02:24:36,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:24:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-24 02:24:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2020-10-24 02:24:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-24 02:24:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-24 02:24:36,370 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-10-24 02:24:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:36,370 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-24 02:24:36,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:24:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-24 02:24:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-24 02:24:36,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:36,372 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:36,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:24:36,372 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 784388576, now seen corresponding path program 9 times [2020-10-24 02:24:36,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:36,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721406565] [2020-10-24 02:24:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 2 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:36,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721406565] [2020-10-24 02:24:36,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:36,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:24:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541368751] [2020-10-24 02:24:36,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:24:36,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:24:36,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:24:36,960 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 22 states. [2020-10-24 02:24:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:38,542 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2020-10-24 02:24:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 02:24:38,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 119 [2020-10-24 02:24:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:38,546 INFO L225 Difference]: With dead ends: 240 [2020-10-24 02:24:38,546 INFO L226 Difference]: Without dead ends: 143 [2020-10-24 02:24:38,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:24:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-24 02:24:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2020-10-24 02:24:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-24 02:24:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-24 02:24:38,561 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 119 [2020-10-24 02:24:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:38,562 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-24 02:24:38,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:24:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-24 02:24:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-24 02:24:38,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:38,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:38,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:24:38,564 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 40861789, now seen corresponding path program 10 times [2020-10-24 02:24:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:38,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319298481] [2020-10-24 02:24:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:39,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319298481] [2020-10-24 02:24:39,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:39,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:24:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292660355] [2020-10-24 02:24:39,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:24:39,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:24:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:24:39,346 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 24 states. [2020-10-24 02:24:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:41,094 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2020-10-24 02:24:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-24 02:24:41,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 128 [2020-10-24 02:24:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:41,100 INFO L225 Difference]: With dead ends: 258 [2020-10-24 02:24:41,101 INFO L226 Difference]: Without dead ends: 152 [2020-10-24 02:24:41,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:24:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-24 02:24:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 138. [2020-10-24 02:24:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-24 02:24:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-24 02:24:41,117 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 128 [2020-10-24 02:24:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:41,118 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-24 02:24:41,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:24:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-24 02:24:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-24 02:24:41,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:41,120 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:41,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:24:41,121 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1522479488, now seen corresponding path program 11 times [2020-10-24 02:24:41,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:41,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955231423] [2020-10-24 02:24:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:41,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955231423] [2020-10-24 02:24:41,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:41,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:24:41,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9335132] [2020-10-24 02:24:41,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:24:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:24:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:24:41,898 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 26 states. [2020-10-24 02:24:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:43,746 INFO L93 Difference]: Finished difference Result 276 states and 281 transitions. [2020-10-24 02:24:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 02:24:43,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 137 [2020-10-24 02:24:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:43,749 INFO L225 Difference]: With dead ends: 276 [2020-10-24 02:24:43,749 INFO L226 Difference]: Without dead ends: 161 [2020-10-24 02:24:43,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:24:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-24 02:24:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2020-10-24 02:24:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-24 02:24:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-10-24 02:24:43,765 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-10-24 02:24:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:43,766 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-10-24 02:24:43,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:24:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-10-24 02:24:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-24 02:24:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:43,768 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:43,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:24:43,769 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1678882749, now seen corresponding path program 12 times [2020-10-24 02:24:43,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:43,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240312467] [2020-10-24 02:24:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 2 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:44,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240312467] [2020-10-24 02:24:44,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:44,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:24:44,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541136146] [2020-10-24 02:24:44,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:24:44,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:24:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:24:44,691 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 28 states. [2020-10-24 02:24:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:47,060 INFO L93 Difference]: Finished difference Result 294 states and 299 transitions. [2020-10-24 02:24:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-24 02:24:47,062 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2020-10-24 02:24:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:47,063 INFO L225 Difference]: With dead ends: 294 [2020-10-24 02:24:47,063 INFO L226 Difference]: Without dead ends: 170 [2020-10-24 02:24:47,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:24:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-24 02:24:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 156. [2020-10-24 02:24:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 02:24:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2020-10-24 02:24:47,078 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 146 [2020-10-24 02:24:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:47,078 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2020-10-24 02:24:47,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:24:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2020-10-24 02:24:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 02:24:47,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:47,080 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:47,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:24:47,081 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1555489568, now seen corresponding path program 13 times [2020-10-24 02:24:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762895789] [2020-10-24 02:24:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:48,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762895789] [2020-10-24 02:24:48,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:48,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:24:48,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846679383] [2020-10-24 02:24:48,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:24:48,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:48,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:24:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:24:48,094 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 30 states. [2020-10-24 02:24:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:50,825 INFO L93 Difference]: Finished difference Result 312 states and 317 transitions. [2020-10-24 02:24:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-24 02:24:50,830 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2020-10-24 02:24:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:50,832 INFO L225 Difference]: With dead ends: 312 [2020-10-24 02:24:50,832 INFO L226 Difference]: Without dead ends: 179 [2020-10-24 02:24:50,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:24:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-24 02:24:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2020-10-24 02:24:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-24 02:24:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2020-10-24 02:24:50,846 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 155 [2020-10-24 02:24:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:50,847 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2020-10-24 02:24:50,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:24:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2020-10-24 02:24:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-24 02:24:50,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:50,849 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:50,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:24:50,849 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash 471389981, now seen corresponding path program 14 times [2020-10-24 02:24:50,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353695763] [2020-10-24 02:24:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:51,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 2 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:51,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353695763] [2020-10-24 02:24:51,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:51,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:24:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386588426] [2020-10-24 02:24:51,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:24:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:24:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:24:51,999 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 32 states. [2020-10-24 02:24:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:55,028 INFO L93 Difference]: Finished difference Result 330 states and 335 transitions. [2020-10-24 02:24:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-24 02:24:55,028 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 164 [2020-10-24 02:24:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:55,030 INFO L225 Difference]: With dead ends: 330 [2020-10-24 02:24:55,030 INFO L226 Difference]: Without dead ends: 188 [2020-10-24 02:24:55,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:24:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-24 02:24:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 174. [2020-10-24 02:24:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-24 02:24:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-24 02:24:55,046 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 164 [2020-10-24 02:24:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:55,047 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-24 02:24:55,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:24:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-24 02:24:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-24 02:24:55,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:55,049 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:55,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:24:55,049 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1020071872, now seen corresponding path program 15 times [2020-10-24 02:24:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:55,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752953863] [2020-10-24 02:24:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752953863] [2020-10-24 02:24:56,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:56,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:24:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781715822] [2020-10-24 02:24:56,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:24:56,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:24:56,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:24:56,289 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 34 states. [2020-10-24 02:24:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:59,777 INFO L93 Difference]: Finished difference Result 348 states and 353 transitions. [2020-10-24 02:24:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-24 02:24:59,780 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2020-10-24 02:24:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:59,782 INFO L225 Difference]: With dead ends: 348 [2020-10-24 02:24:59,782 INFO L226 Difference]: Without dead ends: 197 [2020-10-24 02:24:59,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:24:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-24 02:24:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2020-10-24 02:24:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-24 02:24:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-24 02:24:59,798 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2020-10-24 02:24:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:59,798 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-24 02:24:59,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:24:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-24 02:24:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-24 02:24:59,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:59,800 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:59,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:24:59,801 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1109057149, now seen corresponding path program 16 times [2020-10-24 02:24:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:59,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303637767] [2020-10-24 02:24:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:01,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 2 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303637767] [2020-10-24 02:25:01,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:01,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:25:01,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625143250] [2020-10-24 02:25:01,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:25:01,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:25:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:01,206 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 36 states. [2020-10-24 02:25:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:05,034 INFO L93 Difference]: Finished difference Result 366 states and 371 transitions. [2020-10-24 02:25:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-24 02:25:05,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 182 [2020-10-24 02:25:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:05,041 INFO L225 Difference]: With dead ends: 366 [2020-10-24 02:25:05,041 INFO L226 Difference]: Without dead ends: 206 [2020-10-24 02:25:05,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=250, Invalid=4442, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 02:25:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-24 02:25:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 192. [2020-10-24 02:25:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-24 02:25:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2020-10-24 02:25:05,061 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 182 [2020-10-24 02:25:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:05,062 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2020-10-24 02:25:05,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:25:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2020-10-24 02:25:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-24 02:25:05,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:05,064 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:05,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:25:05,064 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1454199904, now seen corresponding path program 17 times [2020-10-24 02:25:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:05,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841050148] [2020-10-24 02:25:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:06,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 2 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841050148] [2020-10-24 02:25:06,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:06,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:25:06,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501086126] [2020-10-24 02:25:06,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:25:06,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:25:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:25:06,586 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 38 states. [2020-10-24 02:25:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,826 INFO L93 Difference]: Finished difference Result 384 states and 389 transitions. [2020-10-24 02:25:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-24 02:25:10,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 191 [2020-10-24 02:25:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,828 INFO L225 Difference]: With dead ends: 384 [2020-10-24 02:25:10,828 INFO L226 Difference]: Without dead ends: 215 [2020-10-24 02:25:10,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 02:25:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-24 02:25:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2020-10-24 02:25:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-24 02:25:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2020-10-24 02:25:10,847 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 191 [2020-10-24 02:25:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,848 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2020-10-24 02:25:10,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:25:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2020-10-24 02:25:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-24 02:25:10,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,851 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:10,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:25:10,852 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1949158877, now seen corresponding path program 18 times [2020-10-24 02:25:10,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170043468] [2020-10-24 02:25:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 2 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:12,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170043468] [2020-10-24 02:25:12,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:25:12,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007523824] [2020-10-24 02:25:12,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:25:12,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:25:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:12,560 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 40 states. [2020-10-24 02:25:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:17,171 INFO L93 Difference]: Finished difference Result 402 states and 407 transitions. [2020-10-24 02:25:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-24 02:25:17,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 200 [2020-10-24 02:25:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:17,177 INFO L225 Difference]: With dead ends: 402 [2020-10-24 02:25:17,178 INFO L226 Difference]: Without dead ends: 224 [2020-10-24 02:25:17,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 02:25:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-24 02:25:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2020-10-24 02:25:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-24 02:25:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-10-24 02:25:17,198 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 200 [2020-10-24 02:25:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:17,198 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-10-24 02:25:17,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:25:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-10-24 02:25:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-24 02:25:17,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:17,200 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:17,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:25:17,200 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2063486720, now seen corresponding path program 19 times [2020-10-24 02:25:17,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:17,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115429270] [2020-10-24 02:25:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:18,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 2 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115429270] [2020-10-24 02:25:19,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:19,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:25:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108831379] [2020-10-24 02:25:19,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:25:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:25:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:25:19,010 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 42 states. [2020-10-24 02:25:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:24,079 INFO L93 Difference]: Finished difference Result 420 states and 425 transitions. [2020-10-24 02:25:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-24 02:25:24,079 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 209 [2020-10-24 02:25:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:24,083 INFO L225 Difference]: With dead ends: 420 [2020-10-24 02:25:24,083 INFO L226 Difference]: Without dead ends: 233 [2020-10-24 02:25:24,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=295, Invalid=6185, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:25:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-24 02:25:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 219. [2020-10-24 02:25:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-24 02:25:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2020-10-24 02:25:24,101 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 209 [2020-10-24 02:25:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:24,102 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2020-10-24 02:25:24,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:25:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2020-10-24 02:25:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-24 02:25:24,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:24,103 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:24,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:25:24,104 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 921150781, now seen corresponding path program 20 times [2020-10-24 02:25:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:24,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451196433] [2020-10-24 02:25:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:25,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 2 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:26,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451196433] [2020-10-24 02:25:26,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:26,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:25:26,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279973885] [2020-10-24 02:25:26,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:25:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:25:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:25:26,014 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 44 states. [2020-10-24 02:25:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:31,472 INFO L93 Difference]: Finished difference Result 438 states and 443 transitions. [2020-10-24 02:25:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-24 02:25:31,476 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 218 [2020-10-24 02:25:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:31,478 INFO L225 Difference]: With dead ends: 438 [2020-10-24 02:25:31,478 INFO L226 Difference]: Without dead ends: 242 [2020-10-24 02:25:31,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:25:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-24 02:25:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 228. [2020-10-24 02:25:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-24 02:25:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2020-10-24 02:25:31,494 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 218 [2020-10-24 02:25:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:31,494 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2020-10-24 02:25:31,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:25:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2020-10-24 02:25:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-24 02:25:31,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:31,496 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:31,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:25:31,496 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash 200549792, now seen corresponding path program 21 times [2020-10-24 02:25:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:31,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433748350] [2020-10-24 02:25:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 2 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:33,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433748350] [2020-10-24 02:25:33,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:33,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:25:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400959570] [2020-10-24 02:25:33,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:25:33,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:25:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:25:33,550 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand 46 states. [2020-10-24 02:25:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:39,509 INFO L93 Difference]: Finished difference Result 456 states and 461 transitions. [2020-10-24 02:25:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-24 02:25:39,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 227 [2020-10-24 02:25:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:39,512 INFO L225 Difference]: With dead ends: 456 [2020-10-24 02:25:39,512 INFO L226 Difference]: Without dead ends: 251 [2020-10-24 02:25:39,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 02:25:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-24 02:25:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 237. [2020-10-24 02:25:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-24 02:25:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2020-10-24 02:25:39,533 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 227 [2020-10-24 02:25:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:39,534 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2020-10-24 02:25:39,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:25:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2020-10-24 02:25:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-24 02:25:39,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:39,536 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:39,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:25:39,536 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1432249501, now seen corresponding path program 22 times [2020-10-24 02:25:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:39,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542748052] [2020-10-24 02:25:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:41,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542748052] [2020-10-24 02:25:41,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:41,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:25:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021493878] [2020-10-24 02:25:41,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:25:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:41,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:25:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:25:41,823 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand 48 states. [2020-10-24 02:25:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:48,348 INFO L93 Difference]: Finished difference Result 474 states and 479 transitions. [2020-10-24 02:25:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-24 02:25:48,349 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 236 [2020-10-24 02:25:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:48,351 INFO L225 Difference]: With dead ends: 474 [2020-10-24 02:25:48,352 INFO L226 Difference]: Without dead ends: 260 [2020-10-24 02:25:48,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=340, Invalid=8216, Unknown=0, NotChecked=0, Total=8556 [2020-10-24 02:25:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-24 02:25:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2020-10-24 02:25:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-24 02:25:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2020-10-24 02:25:48,368 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 236 [2020-10-24 02:25:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:48,368 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2020-10-24 02:25:48,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:25:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2020-10-24 02:25:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-24 02:25:48,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:48,370 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:48,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:25:48,370 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash 959361600, now seen corresponding path program 23 times [2020-10-24 02:25:48,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:48,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711475267] [2020-10-24 02:25:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:50,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 2 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:50,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711475267] [2020-10-24 02:25:50,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:50,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:25:50,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728339755] [2020-10-24 02:25:50,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:25:50,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:25:50,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:25:50,846 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 50 states. [2020-10-24 02:25:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:58,002 INFO L93 Difference]: Finished difference Result 492 states and 497 transitions. [2020-10-24 02:25:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-24 02:25:58,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 245 [2020-10-24 02:25:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:58,005 INFO L225 Difference]: With dead ends: 492 [2020-10-24 02:25:58,005 INFO L226 Difference]: Without dead ends: 269 [2020-10-24 02:25:58,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=355, Invalid=8957, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 02:25:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-24 02:25:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 255. [2020-10-24 02:25:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-24 02:25:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2020-10-24 02:25:58,023 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 245 [2020-10-24 02:25:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:58,024 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2020-10-24 02:25:58,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:25:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2020-10-24 02:25:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-24 02:25:58,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:58,026 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:58,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:25:58,026 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1093143549, now seen corresponding path program 24 times [2020-10-24 02:25:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:58,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232402638] [2020-10-24 02:25:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 2 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232402638] [2020-10-24 02:26:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:26:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070941755] [2020-10-24 02:26:00,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:26:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:26:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:26:00,733 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 52 states. [2020-10-24 02:26:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:08,520 INFO L93 Difference]: Finished difference Result 510 states and 515 transitions. [2020-10-24 02:26:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-24 02:26:08,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 254 [2020-10-24 02:26:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:08,523 INFO L225 Difference]: With dead ends: 510 [2020-10-24 02:26:08,524 INFO L226 Difference]: Without dead ends: 278 [2020-10-24 02:26:08,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=370, Invalid=9730, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 02:26:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-24 02:26:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 264. [2020-10-24 02:26:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-24 02:26:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2020-10-24 02:26:08,542 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 254 [2020-10-24 02:26:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:08,543 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2020-10-24 02:26:08,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:26:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2020-10-24 02:26:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-24 02:26:08,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:08,545 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:08,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:26:08,545 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:08,546 INFO L82 PathProgramCache]: Analyzing trace with hash 64706272, now seen corresponding path program 25 times [2020-10-24 02:26:08,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:08,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690303850] [2020-10-24 02:26:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:11,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 2 proven. 2725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:11,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690303850] [2020-10-24 02:26:11,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:11,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-24 02:26:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625217630] [2020-10-24 02:26:11,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 02:26:11,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 02:26:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:26:11,554 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand 54 states. [2020-10-24 02:26:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:19,772 INFO L93 Difference]: Finished difference Result 528 states and 533 transitions. [2020-10-24 02:26:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-24 02:26:19,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 263 [2020-10-24 02:26:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:19,776 INFO L225 Difference]: With dead ends: 528 [2020-10-24 02:26:19,776 INFO L226 Difference]: Without dead ends: 287 [2020-10-24 02:26:19,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=385, Invalid=10535, Unknown=0, NotChecked=0, Total=10920 [2020-10-24 02:26:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-24 02:26:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 273. [2020-10-24 02:26:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-24 02:26:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2020-10-24 02:26:19,796 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2020-10-24 02:26:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:19,796 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2020-10-24 02:26:19,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 02:26:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2020-10-24 02:26:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-24 02:26:19,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:19,799 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:19,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:26:19,799 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1918540637, now seen corresponding path program 26 times [2020-10-24 02:26:19,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:19,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103160875] [2020-10-24 02:26:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 2 proven. 2951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:22,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103160875] [2020-10-24 02:26:22,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:22,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:26:22,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889688287] [2020-10-24 02:26:22,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:26:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:26:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:26:22,984 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 56 states. [2020-10-24 02:26:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:32,137 INFO L93 Difference]: Finished difference Result 546 states and 551 transitions. [2020-10-24 02:26:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-24 02:26:32,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 272 [2020-10-24 02:26:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:32,140 INFO L225 Difference]: With dead ends: 546 [2020-10-24 02:26:32,140 INFO L226 Difference]: Without dead ends: 296 [2020-10-24 02:26:32,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=400, Invalid=11372, Unknown=0, NotChecked=0, Total=11772 [2020-10-24 02:26:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-24 02:26:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 282. [2020-10-24 02:26:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-24 02:26:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 284 transitions. [2020-10-24 02:26:32,160 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 284 transitions. Word has length 272 [2020-10-24 02:26:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:32,160 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 284 transitions. [2020-10-24 02:26:32,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:26:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 284 transitions. [2020-10-24 02:26:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-24 02:26:32,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:32,163 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:32,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:26:32,163 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1398533248, now seen corresponding path program 27 times [2020-10-24 02:26:32,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:32,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364897016] [2020-10-24 02:26:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 2 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:35,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364897016] [2020-10-24 02:26:35,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:35,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:26:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541802168] [2020-10-24 02:26:35,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:26:35,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:26:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:26:35,662 INFO L87 Difference]: Start difference. First operand 282 states and 284 transitions. Second operand 58 states. [2020-10-24 02:26:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:45,441 INFO L93 Difference]: Finished difference Result 564 states and 569 transitions. [2020-10-24 02:26:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-24 02:26:45,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 281 [2020-10-24 02:26:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:45,444 INFO L225 Difference]: With dead ends: 564 [2020-10-24 02:26:45,444 INFO L226 Difference]: Without dead ends: 305 [2020-10-24 02:26:45,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=415, Invalid=12241, Unknown=0, NotChecked=0, Total=12656 [2020-10-24 02:26:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-24 02:26:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 291. [2020-10-24 02:26:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-24 02:26:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2020-10-24 02:26:45,463 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 281 [2020-10-24 02:26:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:45,464 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2020-10-24 02:26:45,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:26:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2020-10-24 02:26:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-24 02:26:45,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:45,466 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:45,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:26:45,466 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash -947121475, now seen corresponding path program 28 times [2020-10-24 02:26:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731103857] [2020-10-24 02:26:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 2 proven. 3430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:49,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731103857] [2020-10-24 02:26:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:26:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489673330] [2020-10-24 02:26:49,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:26:49,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:26:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:26:49,136 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand 60 states. [2020-10-24 02:26:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:59,973 INFO L93 Difference]: Finished difference Result 582 states and 587 transitions. [2020-10-24 02:26:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-24 02:26:59,974 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 290 [2020-10-24 02:26:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:59,976 INFO L225 Difference]: With dead ends: 582 [2020-10-24 02:26:59,976 INFO L226 Difference]: Without dead ends: 314 [2020-10-24 02:26:59,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=430, Invalid=13142, Unknown=0, NotChecked=0, Total=13572 [2020-10-24 02:26:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-24 02:26:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 300. [2020-10-24 02:26:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-24 02:26:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 302 transitions. [2020-10-24 02:26:59,999 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 302 transitions. Word has length 290 [2020-10-24 02:27:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:00,000 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 302 transitions. [2020-10-24 02:27:00,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:27:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 302 transitions. [2020-10-24 02:27:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-24 02:27:00,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:00,002 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:00,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:27:00,002 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1572005920, now seen corresponding path program 29 times [2020-10-24 02:27:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232027557] [2020-10-24 02:27:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:03,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3685 backedges. 2 proven. 3683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:04,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232027557] [2020-10-24 02:27:04,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-24 02:27:04,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435888808] [2020-10-24 02:27:04,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 02:27:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 02:27:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 02:27:04,087 INFO L87 Difference]: Start difference. First operand 300 states and 302 transitions. Second operand 62 states. [2020-10-24 02:27:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:15,600 INFO L93 Difference]: Finished difference Result 600 states and 605 transitions. [2020-10-24 02:27:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-24 02:27:15,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 299 [2020-10-24 02:27:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:15,603 INFO L225 Difference]: With dead ends: 600 [2020-10-24 02:27:15,603 INFO L226 Difference]: Without dead ends: 323 [2020-10-24 02:27:15,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=445, Invalid=14075, Unknown=0, NotChecked=0, Total=14520 [2020-10-24 02:27:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-24 02:27:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 309. [2020-10-24 02:27:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-24 02:27:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 311 transitions. [2020-10-24 02:27:15,627 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 311 transitions. Word has length 299 [2020-10-24 02:27:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:15,627 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 311 transitions. [2020-10-24 02:27:15,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 02:27:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 311 transitions. [2020-10-24 02:27:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-24 02:27:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:15,630 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:15,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:27:15,631 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash -439193059, now seen corresponding path program 30 times [2020-10-24 02:27:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:15,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338034120] [2020-10-24 02:27:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 2 proven. 3945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338034120] [2020-10-24 02:27:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:27:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486667932] [2020-10-24 02:27:20,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:27:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:27:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:27:20,105 INFO L87 Difference]: Start difference. First operand 309 states and 311 transitions. Second operand 64 states. [2020-10-24 02:27:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:32,665 INFO L93 Difference]: Finished difference Result 618 states and 623 transitions. [2020-10-24 02:27:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-24 02:27:32,666 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 308 [2020-10-24 02:27:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:32,667 INFO L225 Difference]: With dead ends: 618 [2020-10-24 02:27:32,668 INFO L226 Difference]: Without dead ends: 332 [2020-10-24 02:27:32,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=460, Invalid=15040, Unknown=0, NotChecked=0, Total=15500 [2020-10-24 02:27:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-24 02:27:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 318. [2020-10-24 02:27:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:27:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 320 transitions. [2020-10-24 02:27:32,688 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 320 transitions. Word has length 308 [2020-10-24 02:27:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:32,689 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 320 transitions. [2020-10-24 02:27:32,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:27:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 320 transitions. [2020-10-24 02:27:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-24 02:27:32,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:32,691 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:32,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:27:32,691 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash -894315328, now seen corresponding path program 31 times [2020-10-24 02:27:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:32,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663524793] [2020-10-24 02:27:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 2 proven. 4216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:37,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663524793] [2020-10-24 02:27:37,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:37,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-24 02:27:37,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83053322] [2020-10-24 02:27:37,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 02:27:37,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 02:27:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:27:37,416 INFO L87 Difference]: Start difference. First operand 318 states and 320 transitions. Second operand 66 states. [2020-10-24 02:27:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:50,915 INFO L93 Difference]: Finished difference Result 636 states and 641 transitions. [2020-10-24 02:27:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-24 02:27:50,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 317 [2020-10-24 02:27:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:50,918 INFO L225 Difference]: With dead ends: 636 [2020-10-24 02:27:50,918 INFO L226 Difference]: Without dead ends: 341 [2020-10-24 02:27:50,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=475, Invalid=16037, Unknown=0, NotChecked=0, Total=16512 [2020-10-24 02:27:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-24 02:27:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2020-10-24 02:27:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-24 02:27:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 329 transitions. [2020-10-24 02:27:50,940 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 329 transitions. Word has length 317 [2020-10-24 02:27:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:50,941 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 329 transitions. [2020-10-24 02:27:50,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 02:27:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 329 transitions. [2020-10-24 02:27:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-24 02:27:50,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:50,943 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:50,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:27:50,943 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1732003459, now seen corresponding path program 32 times [2020-10-24 02:27:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:50,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495233020] [2020-10-24 02:27:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:55,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 2 proven. 4496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:56,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495233020] [2020-10-24 02:27:56,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:56,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:27:56,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386687653] [2020-10-24 02:27:56,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:27:56,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:27:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:27:56,168 INFO L87 Difference]: Start difference. First operand 327 states and 329 transitions. Second operand 68 states. [2020-10-24 02:28:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:11,049 INFO L93 Difference]: Finished difference Result 654 states and 659 transitions. [2020-10-24 02:28:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-24 02:28:11,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 326 [2020-10-24 02:28:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:11,052 INFO L225 Difference]: With dead ends: 654 [2020-10-24 02:28:11,052 INFO L226 Difference]: Without dead ends: 350 [2020-10-24 02:28:11,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=490, Invalid=17066, Unknown=0, NotChecked=0, Total=17556 [2020-10-24 02:28:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-24 02:28:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 336. [2020-10-24 02:28:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:28:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2020-10-24 02:28:11,075 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 326 [2020-10-24 02:28:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:11,075 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2020-10-24 02:28:11,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:28:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2020-10-24 02:28:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-24 02:28:11,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:11,078 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:11,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:28:11,078 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash -792012448, now seen corresponding path program 33 times [2020-10-24 02:28:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682046454] [2020-10-24 02:28:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:16,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4787 backedges. 2 proven. 4785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682046454] [2020-10-24 02:28:16,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:16,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-24 02:28:16,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633157593] [2020-10-24 02:28:16,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 02:28:16,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 02:28:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:28:16,738 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 70 states. [2020-10-24 02:28:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:32,722 INFO L93 Difference]: Finished difference Result 672 states and 677 transitions. [2020-10-24 02:28:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-10-24 02:28:32,723 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 335 [2020-10-24 02:28:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:32,725 INFO L225 Difference]: With dead ends: 672 [2020-10-24 02:28:32,725 INFO L226 Difference]: Without dead ends: 359 [2020-10-24 02:28:32,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=505, Invalid=18127, Unknown=0, NotChecked=0, Total=18632 [2020-10-24 02:28:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-24 02:28:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 345. [2020-10-24 02:28:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-24 02:28:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 347 transitions. [2020-10-24 02:28:32,749 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 347 transitions. Word has length 335 [2020-10-24 02:28:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:32,750 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 347 transitions. [2020-10-24 02:28:32,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 02:28:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 347 transitions. [2020-10-24 02:28:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-24 02:28:32,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:32,753 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:32,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:28:32,753 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash 846588125, now seen corresponding path program 34 times [2020-10-24 02:28:32,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:32,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607684144] [2020-10-24 02:28:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:38,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5085 backedges. 2 proven. 5083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:39,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607684144] [2020-10-24 02:28:39,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:39,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:28:39,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60396183] [2020-10-24 02:28:39,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:28:39,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:28:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:28:39,022 INFO L87 Difference]: Start difference. First operand 345 states and 347 transitions. Second operand 72 states. [2020-10-24 02:28:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:56,427 INFO L93 Difference]: Finished difference Result 690 states and 695 transitions. [2020-10-24 02:28:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-10-24 02:28:56,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 344 [2020-10-24 02:28:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:56,431 INFO L225 Difference]: With dead ends: 690 [2020-10-24 02:28:56,431 INFO L226 Difference]: Without dead ends: 368 [2020-10-24 02:28:56,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=520, Invalid=19220, Unknown=0, NotChecked=0, Total=19740 [2020-10-24 02:28:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-24 02:28:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 354. [2020-10-24 02:28:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-24 02:28:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 356 transitions. [2020-10-24 02:28:56,456 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 356 transitions. Word has length 344 [2020-10-24 02:28:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:56,471 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 356 transitions. [2020-10-24 02:28:56,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:28:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 356 transitions. [2020-10-24 02:28:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-24 02:28:56,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:56,475 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:56,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:28:56,475 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash 380106240, now seen corresponding path program 35 times [2020-10-24 02:28:56,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:56,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643221145] [2020-10-24 02:28:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:03,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5392 backedges. 2 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643221145] [2020-10-24 02:29:03,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:03,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-24 02:29:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413090367] [2020-10-24 02:29:03,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 02:29:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 02:29:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:29:03,746 INFO L87 Difference]: Start difference. First operand 354 states and 356 transitions. Second operand 74 states. [2020-10-24 02:29:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,436 INFO L93 Difference]: Finished difference Result 708 states and 713 transitions. [2020-10-24 02:29:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-10-24 02:29:23,437 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 353 [2020-10-24 02:29:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,440 INFO L225 Difference]: With dead ends: 708 [2020-10-24 02:29:23,440 INFO L226 Difference]: Without dead ends: 377 [2020-10-24 02:29:23,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=535, Invalid=20345, Unknown=0, NotChecked=0, Total=20880 [2020-10-24 02:29:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-24 02:29:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 363. [2020-10-24 02:29:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-24 02:29:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 365 transitions. [2020-10-24 02:29:23,463 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 365 transitions. Word has length 353 [2020-10-24 02:29:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,463 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 365 transitions. [2020-10-24 02:29:23,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 02:29:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 365 transitions. [2020-10-24 02:29:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-24 02:29:23,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,467 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:23,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:29:23,467 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash -343998403, now seen corresponding path program 36 times [2020-10-24 02:29:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771692565] [2020-10-24 02:29:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:31,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5708 backedges. 2 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:31,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771692565] [2020-10-24 02:29:31,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:31,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:29:31,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718394044] [2020-10-24 02:29:31,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:29:31,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:29:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:29:31,675 INFO L87 Difference]: Start difference. First operand 363 states and 365 transitions. Second operand 76 states. [2020-10-24 02:29:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:53,822 INFO L93 Difference]: Finished difference Result 726 states and 731 transitions. [2020-10-24 02:29:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-24 02:29:53,824 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 362 [2020-10-24 02:29:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:53,827 INFO L225 Difference]: With dead ends: 726 [2020-10-24 02:29:53,827 INFO L226 Difference]: Without dead ends: 386 [2020-10-24 02:29:53,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=550, Invalid=21502, Unknown=0, NotChecked=0, Total=22052 [2020-10-24 02:29:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-24 02:29:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 372. [2020-10-24 02:29:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-24 02:29:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 374 transitions. [2020-10-24 02:29:53,853 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 374 transitions. Word has length 362 [2020-10-24 02:29:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:53,854 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 374 transitions. [2020-10-24 02:29:53,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:29:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 374 transitions. [2020-10-24 02:29:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-24 02:29:53,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:53,857 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:53,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:29:53,858 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1401738592, now seen corresponding path program 37 times [2020-10-24 02:29:53,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:53,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177600389] [2020-10-24 02:29:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:02,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6033 backedges. 2 proven. 6031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:02,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177600389] [2020-10-24 02:30:02,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:02,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-24 02:30:02,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953432254] [2020-10-24 02:30:02,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 02:30:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 02:30:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 02:30:02,663 INFO L87 Difference]: Start difference. First operand 372 states and 374 transitions. Second operand 78 states. [2020-10-24 02:30:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:27,435 INFO L93 Difference]: Finished difference Result 744 states and 749 transitions. [2020-10-24 02:30:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-10-24 02:30:27,437 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 371 [2020-10-24 02:30:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:27,441 INFO L225 Difference]: With dead ends: 744 [2020-10-24 02:30:27,441 INFO L226 Difference]: Without dead ends: 395 [2020-10-24 02:30:27,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=565, Invalid=22691, Unknown=0, NotChecked=0, Total=23256 [2020-10-24 02:30:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-24 02:30:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 381. [2020-10-24 02:30:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-24 02:30:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 383 transitions. [2020-10-24 02:30:27,469 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 383 transitions. Word has length 371 [2020-10-24 02:30:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:27,470 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 383 transitions. [2020-10-24 02:30:27,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 02:30:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 383 transitions. [2020-10-24 02:30:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-24 02:30:27,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:27,473 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:27,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:30:27,474 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1123352477, now seen corresponding path program 38 times [2020-10-24 02:30:27,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:27,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573110297] [2020-10-24 02:30:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:37,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6367 backedges. 2 proven. 6365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:37,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573110297] [2020-10-24 02:30:37,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:37,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:30:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529987779] [2020-10-24 02:30:37,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:30:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:30:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:30:37,583 INFO L87 Difference]: Start difference. First operand 381 states and 383 transitions. Second operand 80 states. [2020-10-24 02:31:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:07,798 INFO L93 Difference]: Finished difference Result 762 states and 767 transitions. [2020-10-24 02:31:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-10-24 02:31:07,800 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 380 [2020-10-24 02:31:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:07,803 INFO L225 Difference]: With dead ends: 762 [2020-10-24 02:31:07,803 INFO L226 Difference]: Without dead ends: 404 [2020-10-24 02:31:07,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=580, Invalid=23912, Unknown=0, NotChecked=0, Total=24492 [2020-10-24 02:31:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-24 02:31:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2020-10-24 02:31:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-24 02:31:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 392 transitions. [2020-10-24 02:31:07,828 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 392 transitions. Word has length 380 [2020-10-24 02:31:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:07,829 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 392 transitions. [2020-10-24 02:31:07,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:31:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 392 transitions. [2020-10-24 02:31:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-24 02:31:07,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:07,833 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:07,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:31:07,833 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1412008128, now seen corresponding path program 39 times [2020-10-24 02:31:07,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:07,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666528523] [2020-10-24 02:31:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6710 backedges. 2 proven. 6708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:19,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666528523] [2020-10-24 02:31:19,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:19,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-24 02:31:19,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770601635] [2020-10-24 02:31:19,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 02:31:19,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 02:31:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:31:19,385 INFO L87 Difference]: Start difference. First operand 390 states and 392 transitions. Second operand 82 states. [2020-10-24 02:31:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:54,698 INFO L93 Difference]: Finished difference Result 780 states and 785 transitions. [2020-10-24 02:31:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-10-24 02:31:54,701 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 389 [2020-10-24 02:31:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:54,703 INFO L225 Difference]: With dead ends: 780 [2020-10-24 02:31:54,704 INFO L226 Difference]: Without dead ends: 413 [2020-10-24 02:31:54,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=595, Invalid=25165, Unknown=0, NotChecked=0, Total=25760 [2020-10-24 02:31:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-24 02:31:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 399. [2020-10-24 02:31:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-24 02:31:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2020-10-24 02:31:54,735 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 389 [2020-10-24 02:31:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2020-10-24 02:31:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 02:31:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2020-10-24 02:31:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-10-24 02:31:54,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:54,740 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:54,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:31:54,740 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1584260861, now seen corresponding path program 40 times [2020-10-24 02:31:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:54,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121596635] [2020-10-24 02:31:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:07,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7062 backedges. 2 proven. 7060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:07,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121596635] [2020-10-24 02:32:07,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:07,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:32:07,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126008202] [2020-10-24 02:32:07,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:32:07,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:32:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:32:07,416 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand 84 states. [2020-10-24 02:32:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:49,411 INFO L93 Difference]: Finished difference Result 798 states and 803 transitions. [2020-10-24 02:32:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-10-24 02:32:49,414 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 398 [2020-10-24 02:32:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:49,417 INFO L225 Difference]: With dead ends: 798 [2020-10-24 02:32:49,418 INFO L226 Difference]: Without dead ends: 422 [2020-10-24 02:32:49,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=610, Invalid=26450, Unknown=0, NotChecked=0, Total=27060 [2020-10-24 02:32:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-24 02:32:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 408. [2020-10-24 02:32:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-24 02:32:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 410 transitions. [2020-10-24 02:32:49,449 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 410 transitions. Word has length 398 [2020-10-24 02:32:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:49,449 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 410 transitions. [2020-10-24 02:32:49,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:32:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 410 transitions. [2020-10-24 02:32:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-10-24 02:32:49,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:49,454 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:49,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:32:49,455 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash -671360032, now seen corresponding path program 41 times [2020-10-24 02:32:49,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:49,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535863762] [2020-10-24 02:32:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 2 proven. 7421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:04,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535863762] [2020-10-24 02:33:04,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:04,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-24 02:33:04,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185976402] [2020-10-24 02:33:04,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 02:33:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 02:33:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:33:04,533 INFO L87 Difference]: Start difference. First operand 408 states and 410 transitions. Second operand 86 states. [2020-10-24 02:33:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:56,009 INFO L93 Difference]: Finished difference Result 816 states and 821 transitions. [2020-10-24 02:33:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-10-24 02:33:56,012 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 407 [2020-10-24 02:33:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:56,015 INFO L225 Difference]: With dead ends: 816 [2020-10-24 02:33:56,015 INFO L226 Difference]: Without dead ends: 431 [2020-10-24 02:33:56,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=625, Invalid=27767, Unknown=0, NotChecked=0, Total=28392 [2020-10-24 02:33:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-24 02:33:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2020-10-24 02:33:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-24 02:33:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 419 transitions. [2020-10-24 02:33:56,042 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 419 transitions. Word has length 407 [2020-10-24 02:33:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:56,043 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 419 transitions. [2020-10-24 02:33:56,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 02:33:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 419 transitions. [2020-10-24 02:33:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-24 02:33:56,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:56,046 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:56,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:33:56,047 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1778366045, now seen corresponding path program 42 times [2020-10-24 02:33:56,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:56,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921773899] [2020-10-24 02:33:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:13,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7793 backedges. 2 proven. 7791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:13,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921773899] [2020-10-24 02:34:13,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:13,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:34:13,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479002484] [2020-10-24 02:34:13,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:34:13,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:34:13,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:34:13,362 INFO L87 Difference]: Start difference. First operand 417 states and 419 transitions. Second operand 88 states. [2020-10-24 02:35:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:14,140 INFO L93 Difference]: Finished difference Result 834 states and 839 transitions. [2020-10-24 02:35:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-10-24 02:35:14,144 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 416 [2020-10-24 02:35:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:14,147 INFO L225 Difference]: With dead ends: 834 [2020-10-24 02:35:14,147 INFO L226 Difference]: Without dead ends: 440 [2020-10-24 02:35:14,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=640, Invalid=29116, Unknown=0, NotChecked=0, Total=29756 [2020-10-24 02:35:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-24 02:35:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2020-10-24 02:35:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-24 02:35:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 428 transitions. [2020-10-24 02:35:14,181 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 428 transitions. Word has length 416 [2020-10-24 02:35:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:14,182 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 428 transitions. [2020-10-24 02:35:14,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 02:35:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 428 transitions. [2020-10-24 02:35:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-24 02:35:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:14,187 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:14,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:35:14,187 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1032673408, now seen corresponding path program 43 times [2020-10-24 02:35:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:14,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562595056] [2020-10-24 02:35:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:35,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8172 backedges. 2 proven. 8170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562595056] [2020-10-24 02:35:35,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:35,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-24 02:35:35,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632369190] [2020-10-24 02:35:35,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-24 02:35:35,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-24 02:35:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:35:35,430 INFO L87 Difference]: Start difference. First operand 426 states and 428 transitions. Second operand 90 states. [2020-10-24 02:36:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:45,291 INFO L93 Difference]: Finished difference Result 852 states and 857 transitions. [2020-10-24 02:36:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-10-24 02:36:45,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 425 [2020-10-24 02:36:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:45,301 INFO L225 Difference]: With dead ends: 852 [2020-10-24 02:36:45,301 INFO L226 Difference]: Without dead ends: 449 [2020-10-24 02:36:45,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=655, Invalid=30497, Unknown=0, NotChecked=0, Total=31152 [2020-10-24 02:36:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-24 02:36:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 435. [2020-10-24 02:36:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-24 02:36:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 437 transitions. [2020-10-24 02:36:45,350 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 437 transitions. Word has length 425 [2020-10-24 02:36:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:45,351 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 437 transitions. [2020-10-24 02:36:45,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-24 02:36:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 437 transitions. [2020-10-24 02:36:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-10-24 02:36:45,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:45,355 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:45,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:36:45,356 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash -129995331, now seen corresponding path program 44 times [2020-10-24 02:36:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:45,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630685524] [2020-10-24 02:36:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:09,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8560 backedges. 2 proven. 8558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:09,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630685524] [2020-10-24 02:37:09,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:09,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-24 02:37:09,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379851194] [2020-10-24 02:37:09,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-24 02:37:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-24 02:37:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:37:09,832 INFO L87 Difference]: Start difference. First operand 435 states and 437 transitions. Second operand 92 states.