/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:30:17,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:30:17,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:30:17,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:30:17,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:30:17,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:30:17,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:30:17,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:30:17,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:30:17,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:30:17,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:30:17,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:30:17,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:30:17,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:30:17,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:30:17,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:30:17,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:30:17,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:30:17,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:30:17,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:30:17,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:30:17,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:30:17,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:30:17,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:30:17,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:30:17,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:30:17,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:30:17,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:30:17,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:30:17,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:30:17,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:30:17,495 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:30:17,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:30:17,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:30:17,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:30:17,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:30:17,497 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:30:17,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:30:17,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:30:17,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:30:17,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:30:17,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:30:17,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:30:17,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:30:17,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:30:17,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:30:17,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:30:17,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:30:17,936 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:30:17,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-10-23 20:30:18,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9b4462a/90f2ee26a1de4f7494ab1d9d8cca8b93/FLAG97ccbc79c [2020-10-23 20:30:18,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:30:18,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-10-23 20:30:18,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9b4462a/90f2ee26a1de4f7494ab1d9d8cca8b93/FLAG97ccbc79c [2020-10-23 20:30:19,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9b4462a/90f2ee26a1de4f7494ab1d9d8cca8b93 [2020-10-23 20:30:19,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:30:19,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:30:19,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:30:19,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:30:19,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:30:19,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47aff4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19, skipping insertion in model container [2020-10-23 20:30:19,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:30:19,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:30:19,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:30:19,360 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:30:19,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:30:19,415 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:30:19,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19 WrapperNode [2020-10-23 20:30:19,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:30:19,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:30:19,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:30:19,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:30:19,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (1/1) ... [2020-10-23 20:30:19,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:30:19,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:30:19,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:30:19,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:30:19,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (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 [2020-10-23 20:30:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:30:19,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:30:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:30:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:30:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:30:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:30:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:30:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:30:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:30:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:30:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:30:20,220 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:30:20,220 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 20:30:20,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:30:20 BoogieIcfgContainer [2020-10-23 20:30:20,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:30:20,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:30:20,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:30:20,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:30:20,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:30:19" (1/3) ... [2020-10-23 20:30:20,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a23601f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:30:20, skipping insertion in model container [2020-10-23 20:30:20,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:19" (2/3) ... [2020-10-23 20:30:20,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a23601f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:30:20, skipping insertion in model container [2020-10-23 20:30:20,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:30:20" (3/3) ... [2020-10-23 20:30:20,232 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-10-23 20:30:20,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:30:20,249 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:30:20,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:30:20,286 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:30:20,286 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:30:20,286 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:30:20,286 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:30:20,287 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:30:20,287 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:30:20,287 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:30:20,287 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:30:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-10-23 20:30:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 20:30:20,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:20,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:20,322 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1388703679, now seen corresponding path program 1 times [2020-10-23 20:30:20,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:20,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972100365] [2020-10-23 20:30:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:20,410 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:20,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972100365] [2020-10-23 20:30:20,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:20,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:20,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999442497] [2020-10-23 20:30:20,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:20,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:20,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:20,801 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2020-10-23 20:30:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:21,483 INFO L93 Difference]: Finished difference Result 269 states and 367 transitions. [2020-10-23 20:30:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:21,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-23 20:30:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:21,500 INFO L225 Difference]: With dead ends: 269 [2020-10-23 20:30:21,500 INFO L226 Difference]: Without dead ends: 184 [2020-10-23 20:30:21,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-23 20:30:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-23 20:30:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-23 20:30:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 239 transitions. [2020-10-23 20:30:21,589 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 239 transitions. Word has length 82 [2020-10-23 20:30:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:21,590 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 239 transitions. [2020-10-23 20:30:21,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 239 transitions. [2020-10-23 20:30:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 20:30:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:21,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:21,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:30:21,595 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash 477474984, now seen corresponding path program 1 times [2020-10-23 20:30:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:21,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289470021] [2020-10-23 20:30:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:21,601 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:21,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289470021] [2020-10-23 20:30:21,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:21,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:21,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193769938] [2020-10-23 20:30:21,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:21,802 INFO L87 Difference]: Start difference. First operand 183 states and 239 transitions. Second operand 4 states. [2020-10-23 20:30:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:22,227 INFO L93 Difference]: Finished difference Result 220 states and 293 transitions. [2020-10-23 20:30:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:22,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-23 20:30:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:22,231 INFO L225 Difference]: With dead ends: 220 [2020-10-23 20:30:22,231 INFO L226 Difference]: Without dead ends: 217 [2020-10-23 20:30:22,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-23 20:30:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2020-10-23 20:30:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-23 20:30:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 238 transitions. [2020-10-23 20:30:22,270 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 238 transitions. Word has length 83 [2020-10-23 20:30:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:22,271 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 238 transitions. [2020-10-23 20:30:22,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 238 transitions. [2020-10-23 20:30:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 20:30:22,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:22,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:22,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:30:22,274 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash -92586482, now seen corresponding path program 1 times [2020-10-23 20:30:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:22,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640329884] [2020-10-23 20:30:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:22,278 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:22,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:22,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640329884] [2020-10-23 20:30:22,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:22,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987414419] [2020-10-23 20:30:22,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:22,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:22,440 INFO L87 Difference]: Start difference. First operand 183 states and 238 transitions. Second operand 4 states. [2020-10-23 20:30:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:22,896 INFO L93 Difference]: Finished difference Result 435 states and 599 transitions. [2020-10-23 20:30:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:22,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-23 20:30:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:22,904 INFO L225 Difference]: With dead ends: 435 [2020-10-23 20:30:22,904 INFO L226 Difference]: Without dead ends: 305 [2020-10-23 20:30:22,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-23 20:30:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-10-23 20:30:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-23 20:30:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 409 transitions. [2020-10-23 20:30:22,987 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 409 transitions. Word has length 83 [2020-10-23 20:30:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:22,988 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 409 transitions. [2020-10-23 20:30:22,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 409 transitions. [2020-10-23 20:30:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 20:30:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:22,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:22,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:30:22,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1859268204, now seen corresponding path program 1 times [2020-10-23 20:30:22,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:22,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032227094] [2020-10-23 20:30:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:23,002 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:23,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032227094] [2020-10-23 20:30:23,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:23,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:23,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412890860] [2020-10-23 20:30:23,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:23,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:23,115 INFO L87 Difference]: Start difference. First operand 304 states and 409 transitions. Second operand 4 states. [2020-10-23 20:30:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:23,470 INFO L93 Difference]: Finished difference Result 370 states and 506 transitions. [2020-10-23 20:30:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:23,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-23 20:30:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:23,474 INFO L225 Difference]: With dead ends: 370 [2020-10-23 20:30:23,474 INFO L226 Difference]: Without dead ends: 367 [2020-10-23 20:30:23,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-23 20:30:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 304. [2020-10-23 20:30:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-23 20:30:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 407 transitions. [2020-10-23 20:30:23,525 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 407 transitions. Word has length 84 [2020-10-23 20:30:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:23,525 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 407 transitions. [2020-10-23 20:30:23,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 407 transitions. [2020-10-23 20:30:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 20:30:23,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:23,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:23,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:30:23,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1432352493, now seen corresponding path program 1 times [2020-10-23 20:30:23,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:23,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719367849] [2020-10-23 20:30:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:23,531 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:23,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:23,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719367849] [2020-10-23 20:30:23,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:23,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:23,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962929487] [2020-10-23 20:30:23,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:23,649 INFO L87 Difference]: Start difference. First operand 304 states and 407 transitions. Second operand 4 states. [2020-10-23 20:30:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:24,079 INFO L93 Difference]: Finished difference Result 792 states and 1098 transitions. [2020-10-23 20:30:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:24,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-23 20:30:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:24,084 INFO L225 Difference]: With dead ends: 792 [2020-10-23 20:30:24,084 INFO L226 Difference]: Without dead ends: 541 [2020-10-23 20:30:24,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-23 20:30:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 540. [2020-10-23 20:30:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-23 20:30:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 735 transitions. [2020-10-23 20:30:24,172 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 735 transitions. Word has length 84 [2020-10-23 20:30:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:24,173 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 735 transitions. [2020-10-23 20:30:24,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 735 transitions. [2020-10-23 20:30:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:30:24,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:24,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:24,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:30:24,176 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1745196596, now seen corresponding path program 1 times [2020-10-23 20:30:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:24,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045289846] [2020-10-23 20:30:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:24,180 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:24,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045289846] [2020-10-23 20:30:24,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:24,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:24,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893627901] [2020-10-23 20:30:24,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:24,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:24,255 INFO L87 Difference]: Start difference. First operand 540 states and 735 transitions. Second operand 4 states. [2020-10-23 20:30:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:24,716 INFO L93 Difference]: Finished difference Result 660 states and 910 transitions. [2020-10-23 20:30:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:24,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-23 20:30:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:24,721 INFO L225 Difference]: With dead ends: 660 [2020-10-23 20:30:24,721 INFO L226 Difference]: Without dead ends: 657 [2020-10-23 20:30:24,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-23 20:30:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 540. [2020-10-23 20:30:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-23 20:30:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 731 transitions. [2020-10-23 20:30:24,793 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 731 transitions. Word has length 85 [2020-10-23 20:30:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:24,793 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 731 transitions. [2020-10-23 20:30:24,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 731 transitions. [2020-10-23 20:30:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:30:24,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:24,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:30:24,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1460831994, now seen corresponding path program 1 times [2020-10-23 20:30:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022286898] [2020-10-23 20:30:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:24,799 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:24,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022286898] [2020-10-23 20:30:24,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:24,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:24,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170599703] [2020-10-23 20:30:24,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:24,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:24,876 INFO L87 Difference]: Start difference. First operand 540 states and 731 transitions. Second operand 4 states. [2020-10-23 20:30:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:25,445 INFO L93 Difference]: Finished difference Result 1488 states and 2054 transitions. [2020-10-23 20:30:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:25,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-23 20:30:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:25,452 INFO L225 Difference]: With dead ends: 1488 [2020-10-23 20:30:25,452 INFO L226 Difference]: Without dead ends: 1001 [2020-10-23 20:30:25,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-10-23 20:30:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 1000. [2020-10-23 20:30:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-10-23 20:30:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1359 transitions. [2020-10-23 20:30:25,607 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1359 transitions. Word has length 85 [2020-10-23 20:30:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:25,607 INFO L481 AbstractCegarLoop]: Abstraction has 1000 states and 1359 transitions. [2020-10-23 20:30:25,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1359 transitions. [2020-10-23 20:30:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 20:30:25,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:25,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:25,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:30:25,610 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:25,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1791011720, now seen corresponding path program 1 times [2020-10-23 20:30:25,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:25,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160578293] [2020-10-23 20:30:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:25,613 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160578293] [2020-10-23 20:30:25,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:25,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:25,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125756348] [2020-10-23 20:30:25,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:25,708 INFO L87 Difference]: Start difference. First operand 1000 states and 1359 transitions. Second operand 4 states. [2020-10-23 20:30:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:26,199 INFO L93 Difference]: Finished difference Result 1220 states and 1674 transitions. [2020-10-23 20:30:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:26,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-23 20:30:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:26,206 INFO L225 Difference]: With dead ends: 1220 [2020-10-23 20:30:26,207 INFO L226 Difference]: Without dead ends: 1217 [2020-10-23 20:30:26,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2020-10-23 20:30:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1000. [2020-10-23 20:30:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-10-23 20:30:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1351 transitions. [2020-10-23 20:30:26,333 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1351 transitions. Word has length 86 [2020-10-23 20:30:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:26,333 INFO L481 AbstractCegarLoop]: Abstraction has 1000 states and 1351 transitions. [2020-10-23 20:30:26,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1351 transitions. [2020-10-23 20:30:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 20:30:26,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:26,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:26,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:30:26,336 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1951259239, now seen corresponding path program 1 times [2020-10-23 20:30:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786073017] [2020-10-23 20:30:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:26,339 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:26,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786073017] [2020-10-23 20:30:26,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:26,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:26,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641911038] [2020-10-23 20:30:26,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:26,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:26,410 INFO L87 Difference]: Start difference. First operand 1000 states and 1351 transitions. Second operand 4 states. [2020-10-23 20:30:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:27,186 INFO L93 Difference]: Finished difference Result 2844 states and 3882 transitions. [2020-10-23 20:30:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:27,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-23 20:30:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:27,197 INFO L225 Difference]: With dead ends: 2844 [2020-10-23 20:30:27,197 INFO L226 Difference]: Without dead ends: 1897 [2020-10-23 20:30:27,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2020-10-23 20:30:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1896. [2020-10-23 20:30:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-10-23 20:30:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2551 transitions. [2020-10-23 20:30:27,465 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2551 transitions. Word has length 86 [2020-10-23 20:30:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:27,469 INFO L481 AbstractCegarLoop]: Abstraction has 1896 states and 2551 transitions. [2020-10-23 20:30:27,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2551 transitions. [2020-10-23 20:30:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 20:30:27,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:27,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:27,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:30:27,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash 255691712, now seen corresponding path program 1 times [2020-10-23 20:30:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:27,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475004284] [2020-10-23 20:30:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:27,482 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:27,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:27,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475004284] [2020-10-23 20:30:27,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:27,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:27,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142168643] [2020-10-23 20:30:27,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:27,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:27,585 INFO L87 Difference]: Start difference. First operand 1896 states and 2551 transitions. Second operand 4 states. [2020-10-23 20:30:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:28,200 INFO L93 Difference]: Finished difference Result 2300 states and 3114 transitions. [2020-10-23 20:30:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:28,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-23 20:30:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:28,212 INFO L225 Difference]: With dead ends: 2300 [2020-10-23 20:30:28,212 INFO L226 Difference]: Without dead ends: 2297 [2020-10-23 20:30:28,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2020-10-23 20:30:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1896. [2020-10-23 20:30:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-10-23 20:30:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2535 transitions. [2020-10-23 20:30:28,536 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2535 transitions. Word has length 87 [2020-10-23 20:30:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:28,537 INFO L481 AbstractCegarLoop]: Abstraction has 1896 states and 2535 transitions. [2020-10-23 20:30:28,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2535 transitions. [2020-10-23 20:30:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 20:30:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:28,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:28,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:30:28,541 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -351893530, now seen corresponding path program 1 times [2020-10-23 20:30:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:28,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074776554] [2020-10-23 20:30:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:28,545 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074776554] [2020-10-23 20:30:28,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:28,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:28,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617886284] [2020-10-23 20:30:28,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:28,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:28,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:28,623 INFO L87 Difference]: Start difference. First operand 1896 states and 2535 transitions. Second operand 4 states. [2020-10-23 20:30:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:29,488 INFO L93 Difference]: Finished difference Result 5484 states and 7370 transitions. [2020-10-23 20:30:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:29,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-23 20:30:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:29,506 INFO L225 Difference]: With dead ends: 5484 [2020-10-23 20:30:29,507 INFO L226 Difference]: Without dead ends: 3641 [2020-10-23 20:30:29,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2020-10-23 20:30:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3640. [2020-10-23 20:30:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2020-10-23 20:30:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4823 transitions. [2020-10-23 20:30:30,004 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4823 transitions. Word has length 87 [2020-10-23 20:30:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:30,004 INFO L481 AbstractCegarLoop]: Abstraction has 3640 states and 4823 transitions. [2020-10-23 20:30:30,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4823 transitions. [2020-10-23 20:30:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 20:30:30,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:30,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:30,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:30:30,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -720999804, now seen corresponding path program 1 times [2020-10-23 20:30:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203855329] [2020-10-23 20:30:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:30,015 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203855329] [2020-10-23 20:30:30,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:30,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165163154] [2020-10-23 20:30:30,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:30,088 INFO L87 Difference]: Start difference. First operand 3640 states and 4823 transitions. Second operand 4 states. [2020-10-23 20:30:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:30,934 INFO L93 Difference]: Finished difference Result 4380 states and 5818 transitions. [2020-10-23 20:30:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:30,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-23 20:30:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:30,954 INFO L225 Difference]: With dead ends: 4380 [2020-10-23 20:30:30,954 INFO L226 Difference]: Without dead ends: 4377 [2020-10-23 20:30:30,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2020-10-23 20:30:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3640. [2020-10-23 20:30:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2020-10-23 20:30:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4791 transitions. [2020-10-23 20:30:31,381 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4791 transitions. Word has length 88 [2020-10-23 20:30:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 3640 states and 4791 transitions. [2020-10-23 20:30:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4791 transitions. [2020-10-23 20:30:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 20:30:31,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:31,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:31,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:30:31,386 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:31,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1983814725, now seen corresponding path program 1 times [2020-10-23 20:30:31,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:31,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296730666] [2020-10-23 20:30:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:31,389 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:31,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296730666] [2020-10-23 20:30:31,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:31,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76554678] [2020-10-23 20:30:31,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:31,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:31,458 INFO L87 Difference]: Start difference. First operand 3640 states and 4791 transitions. Second operand 4 states. [2020-10-23 20:30:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:32,542 INFO L93 Difference]: Finished difference Result 10620 states and 14010 transitions. [2020-10-23 20:30:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:32,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-23 20:30:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:32,570 INFO L225 Difference]: With dead ends: 10620 [2020-10-23 20:30:32,570 INFO L226 Difference]: Without dead ends: 7033 [2020-10-23 20:30:32,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2020-10-23 20:30:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 7032. [2020-10-23 20:30:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7032 states. [2020-10-23 20:30:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 9143 transitions. [2020-10-23 20:30:33,568 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 9143 transitions. Word has length 88 [2020-10-23 20:30:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:33,569 INFO L481 AbstractCegarLoop]: Abstraction has 7032 states and 9143 transitions. [2020-10-23 20:30:33,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 9143 transitions. [2020-10-23 20:30:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 20:30:33,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:33,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:33,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:30:33,579 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1376338130, now seen corresponding path program 1 times [2020-10-23 20:30:33,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245974698] [2020-10-23 20:30:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:33,591 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:33,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245974698] [2020-10-23 20:30:33,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:33,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163019115] [2020-10-23 20:30:33,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:33,659 INFO L87 Difference]: Start difference. First operand 7032 states and 9143 transitions. Second operand 4 states. [2020-10-23 20:30:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:35,740 INFO L93 Difference]: Finished difference Result 20604 states and 26810 transitions. [2020-10-23 20:30:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:35,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-23 20:30:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:35,787 INFO L225 Difference]: With dead ends: 20604 [2020-10-23 20:30:35,787 INFO L226 Difference]: Without dead ends: 13625 [2020-10-23 20:30:35,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13625 states. [2020-10-23 20:30:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13625 to 13624. [2020-10-23 20:30:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13624 states. [2020-10-23 20:30:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 17463 transitions. [2020-10-23 20:30:37,437 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 17463 transitions. Word has length 89 [2020-10-23 20:30:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:37,438 INFO L481 AbstractCegarLoop]: Abstraction has 13624 states and 17463 transitions. [2020-10-23 20:30:37,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 17463 transitions. [2020-10-23 20:30:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 20:30:37,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:37,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:37,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:30:37,449 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash -933654196, now seen corresponding path program 1 times [2020-10-23 20:30:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:37,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546322994] [2020-10-23 20:30:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:37,451 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:37,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546322994] [2020-10-23 20:30:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081667303] [2020-10-23 20:30:37,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:37,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:37,518 INFO L87 Difference]: Start difference. First operand 13624 states and 17463 transitions. Second operand 4 states. [2020-10-23 20:30:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:39,356 INFO L93 Difference]: Finished difference Result 16188 states and 20666 transitions. [2020-10-23 20:30:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:39,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-23 20:30:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:39,391 INFO L225 Difference]: With dead ends: 16188 [2020-10-23 20:30:39,391 INFO L226 Difference]: Without dead ends: 16185 [2020-10-23 20:30:39,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2020-10-23 20:30:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 13624. [2020-10-23 20:30:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13624 states. [2020-10-23 20:30:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 17335 transitions. [2020-10-23 20:30:41,406 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 17335 transitions. Word has length 89 [2020-10-23 20:30:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:41,406 INFO L481 AbstractCegarLoop]: Abstraction has 13624 states and 17335 transitions. [2020-10-23 20:30:41,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 17335 transitions. [2020-10-23 20:30:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:30:41,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:41,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:41,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:30:41,417 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1064005776, now seen corresponding path program 1 times [2020-10-23 20:30:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222694314] [2020-10-23 20:30:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:41,420 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:41,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:41,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222694314] [2020-10-23 20:30:41,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:41,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:41,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121247223] [2020-10-23 20:30:41,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:41,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:41,498 INFO L87 Difference]: Start difference. First operand 13624 states and 17335 transitions. Second operand 4 states. [2020-10-23 20:30:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:43,410 INFO L93 Difference]: Finished difference Result 16060 states and 20282 transitions. [2020-10-23 20:30:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:43,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-23 20:30:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:43,438 INFO L225 Difference]: With dead ends: 16060 [2020-10-23 20:30:43,438 INFO L226 Difference]: Without dead ends: 16057 [2020-10-23 20:30:43,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2020-10-23 20:30:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 13624. [2020-10-23 20:30:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13624 states. [2020-10-23 20:30:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 17207 transitions. [2020-10-23 20:30:45,409 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 17207 transitions. Word has length 90 [2020-10-23 20:30:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:45,410 INFO L481 AbstractCegarLoop]: Abstraction has 13624 states and 17207 transitions. [2020-10-23 20:30:45,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 17207 transitions. [2020-10-23 20:30:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:30:45,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:45,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:45,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:30:45,420 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -275555599, now seen corresponding path program 1 times [2020-10-23 20:30:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:45,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620083820] [2020-10-23 20:30:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:45,423 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:45,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620083820] [2020-10-23 20:30:45,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:45,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:45,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953387746] [2020-10-23 20:30:45,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:45,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:45,502 INFO L87 Difference]: Start difference. First operand 13624 states and 17207 transitions. Second operand 4 states. [2020-10-23 20:30:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:49,054 INFO L93 Difference]: Finished difference Result 39996 states and 50490 transitions. [2020-10-23 20:30:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:49,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-23 20:30:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:49,100 INFO L225 Difference]: With dead ends: 39996 [2020-10-23 20:30:49,101 INFO L226 Difference]: Without dead ends: 26425 [2020-10-23 20:30:49,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26425 states. [2020-10-23 20:30:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26425 to 26424. [2020-10-23 20:30:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26424 states. [2020-10-23 20:30:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 32823 transitions. [2020-10-23 20:30:52,409 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 32823 transitions. Word has length 90 [2020-10-23 20:30:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:52,409 INFO L481 AbstractCegarLoop]: Abstraction has 26424 states and 32823 transitions. [2020-10-23 20:30:52,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:30:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 32823 transitions. [2020-10-23 20:30:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 20:30:52,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:52,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:52,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:30:52,423 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash 55357886, now seen corresponding path program 1 times [2020-10-23 20:30:52,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:52,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943063352] [2020-10-23 20:30:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:52,426 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:30:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943063352] [2020-10-23 20:30:52,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:52,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:30:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946747254] [2020-10-23 20:30:52,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:30:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:30:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:30:52,497 INFO L87 Difference]: Start difference. First operand 26424 states and 32823 transitions. Second operand 4 states. [2020-10-23 20:30:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:58,789 INFO L93 Difference]: Finished difference Result 77628 states and 96314 transitions. [2020-10-23 20:30:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:30:58,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-23 20:30:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:58,835 INFO L225 Difference]: With dead ends: 77628 [2020-10-23 20:30:58,835 INFO L226 Difference]: Without dead ends: 39225 [2020-10-23 20:30:58,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:30:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39225 states. [2020-10-23 20:31:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39225 to 39224. [2020-10-23 20:31:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39224 states. [2020-10-23 20:31:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39224 states to 39224 states and 47415 transitions. [2020-10-23 20:31:03,453 INFO L78 Accepts]: Start accepts. Automaton has 39224 states and 47415 transitions. Word has length 91 [2020-10-23 20:31:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:03,453 INFO L481 AbstractCegarLoop]: Abstraction has 39224 states and 47415 transitions. [2020-10-23 20:31:03,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:31:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 39224 states and 47415 transitions. [2020-10-23 20:31:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 20:31:03,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:03,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:31:03,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:31:03,471 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1433033000, now seen corresponding path program 1 times [2020-10-23 20:31:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:03,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613478806] [2020-10-23 20:31:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:03,474 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:31:03,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613478806] [2020-10-23 20:31:03,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:03,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:31:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210846961] [2020-10-23 20:31:03,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:31:03,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:31:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:31:03,533 INFO L87 Difference]: Start difference. First operand 39224 states and 47415 transitions. Second operand 4 states. [2020-10-23 20:31:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:08,551 INFO L93 Difference]: Finished difference Result 43580 states and 52026 transitions. [2020-10-23 20:31:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:31:08,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-23 20:31:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:08,583 INFO L225 Difference]: With dead ends: 43580 [2020-10-23 20:31:08,583 INFO L226 Difference]: Without dead ends: 30777 [2020-10-23 20:31:08,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:31:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30777 states. [2020-10-23 20:31:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30777 to 26424. [2020-10-23 20:31:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26424 states. [2020-10-23 20:31:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 31543 transitions. [2020-10-23 20:31:11,767 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 31543 transitions. Word has length 91 [2020-10-23 20:31:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:11,767 INFO L481 AbstractCegarLoop]: Abstraction has 26424 states and 31543 transitions. [2020-10-23 20:31:11,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:31:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 31543 transitions. [2020-10-23 20:31:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 20:31:11,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:11,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:31:11,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:31:11,780 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1531812196, now seen corresponding path program 1 times [2020-10-23 20:31:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:11,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144025787] [2020-10-23 20:31:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:11,783 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:11,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:31:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144025787] [2020-10-23 20:31:11,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:11,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:31:11,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828620515] [2020-10-23 20:31:11,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:31:11,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:31:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:31:11,841 INFO L87 Difference]: Start difference. First operand 26424 states and 31543 transitions. Second operand 4 states. [2020-10-23 20:31:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:15,014 INFO L93 Difference]: Finished difference Result 26424 states and 31543 transitions. [2020-10-23 20:31:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:31:15,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-23 20:31:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:15,015 INFO L225 Difference]: With dead ends: 26424 [2020-10-23 20:31:15,015 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 20:31:15,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:31:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 20:31:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 20:31:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 20:31:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 20:31:15,057 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2020-10-23 20:31:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:15,058 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 20:31:15,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:31:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 20:31:15,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 20:31:15,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:31:15,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 20:31:17,862 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2020-10-23 20:31:23,635 WARN L193 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 2619 DAG size of output: 31 [2020-10-23 20:31:23,954 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 31 [2020-10-23 20:31:26,376 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 1286 DAG size of output: 65 [2020-10-23 20:31:27,834 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 964 DAG size of output: 47 [2020-10-23 20:31:33,739 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 2308 DAG size of output: 34 [2020-10-23 20:31:35,580 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2020-10-23 20:31:35,893 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 45 [2020-10-23 20:31:43,171 WARN L193 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 1100 DAG size of output: 581 [2020-10-23 20:31:44,289 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 592 DAG size of output: 191 [2020-10-23 20:31:44,968 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 87 [2020-10-23 20:31:50,504 WARN L193 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 2793 DAG size of output: 31 [2020-10-23 20:31:54,716 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2020-10-23 20:31:55,085 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 65 [2020-10-23 20:31:59,030 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 1670 DAG size of output: 53 [2020-10-23 20:32:04,189 WARN L193 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 1540 DAG size of output: 41 [2020-10-23 20:32:06,543 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 2233 DAG size of output: 31 [2020-10-23 20:32:20,320 WARN L193 SmtUtils]: Spent 13.77 s on a formula simplification that was a NOOP. DAG size: 1097 [2020-10-23 20:32:24,493 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 1106 DAG size of output: 321 [2020-10-23 20:32:25,153 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 121 [2020-10-23 20:32:25,938 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 123 [2020-10-23 20:32:26,539 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 67 [2020-10-23 20:32:27,586 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1079 DAG size of output: 39 [2020-10-23 20:32:34,512 WARN L193 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:32:35,513 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2020-10-23 20:32:37,391 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 579 DAG size of output: 321 [2020-10-23 20:32:44,383 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 2054 DAG size of output: 45 [2020-10-23 20:32:48,113 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification that was a NOOP. DAG size: 583 [2020-10-23 20:32:53,965 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 2308 DAG size of output: 34 [2020-10-23 20:33:00,978 WARN L193 SmtUtils]: Spent 6.99 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:33:02,126 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1083 DAG size of output: 53 [2020-10-23 20:33:07,428 WARN L193 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 2767 DAG size of output: 31 [2020-10-23 20:33:10,157 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 1118 DAG size of output: 189 [2020-10-23 20:33:10,781 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 87 [2020-10-23 20:33:11,512 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 772 DAG size of output: 55 [2020-10-23 20:33:12,906 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 1087 DAG size of output: 85 [2020-10-23 20:33:14,207 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1847 DAG size of output: 31 [2020-10-23 20:33:14,498 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 39 [2020-10-23 20:33:21,957 WARN L193 SmtUtils]: Spent 7.45 s on a formula simplification. DAG size of input: 2822 DAG size of output: 39 [2020-10-23 20:33:24,054 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 586 DAG size of output: 323 [2020-10-23 20:33:30,847 WARN L193 SmtUtils]: Spent 6.76 s on a formula simplification. DAG size of input: 2815 DAG size of output: 31 [2020-10-23 20:33:33,278 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2020-10-23 20:33:33,659 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 53 [2020-10-23 20:33:35,610 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 1142 DAG size of output: 121 [2020-10-23 20:33:36,180 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 67 [2020-10-23 20:33:37,674 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 964 DAG size of output: 47 [2020-10-23 20:33:42,457 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 2717 DAG size of output: 31 [2020-10-23 20:33:50,056 WARN L193 SmtUtils]: Spent 7.59 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2020-10-23 20:33:50,523 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 85 [2020-10-23 20:33:54,359 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification that was a NOOP. DAG size: 583 [2020-10-23 20:34:01,507 WARN L193 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:34:02,616 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 592 DAG size of output: 191 [2020-10-23 20:34:09,900 WARN L193 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:34:17,002 WARN L193 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:34:24,277 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2020-10-23 20:34:25,274 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2020-10-23 20:34:26,264 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 189 [2020-10-23 20:34:27,964 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1190 DAG size of output: 85 [2020-10-23 20:34:28,717 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 772 DAG size of output: 55 [2020-10-23 20:34:33,967 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 1540 DAG size of output: 41 [2020-10-23 20:34:35,067 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2020-10-23 20:34:41,155 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 2807 DAG size of output: 31 [2020-10-23 20:34:44,830 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification that was a NOOP. DAG size: 581 [2020-10-23 20:34:46,895 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 586 DAG size of output: 323 [2020-10-23 20:34:47,696 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 123 [2020-10-23 20:34:48,351 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-23 20:34:48,958 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-23 20:34:49,115 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2020-10-23 20:34:52,566 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2020-10-23 20:34:52,687 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-10-23 20:36:15,383 WARN L193 SmtUtils]: Spent 1.38 m on a formula simplification. DAG size of input: 571 DAG size of output: 551 [2020-10-23 20:36:25,446 WARN L193 SmtUtils]: Spent 10.05 s on a formula simplification. DAG size of input: 181 DAG size of output: 161 [2020-10-23 20:36:27,049 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-23 20:36:53,207 WARN L193 SmtUtils]: Spent 26.14 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2020-10-23 20:36:53,821 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-23 20:36:54,096 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2020-10-23 20:41:36,376 WARN L193 SmtUtils]: Spent 4.70 m on a formula simplification. DAG size of input: 1087 DAG size of output: 1067 [2020-10-23 20:42:02,604 WARN L193 SmtUtils]: Spent 26.21 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2020-10-23 20:42:06,153 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2020-10-23 20:42:10,071 WARN L193 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 113 DAG size of output: 93 [2020-10-23 20:42:10,771 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-23 20:42:37,197 WARN L193 SmtUtils]: Spent 26.35 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2020-10-23 20:42:37,323 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15