/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:58:34,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:58:34,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:58:34,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:58:34,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:58:34,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:58:34,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:58:34,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:58:34,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:58:34,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:58:34,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:58:34,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:58:34,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:58:34,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:58:34,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:58:34,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:58:34,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:58:34,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:58:34,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:58:34,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:58:34,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:58:34,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:58:34,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:58:34,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:58:34,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:58:34,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:58:34,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:58:34,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:58:34,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:58:34,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:58:34,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:58:34,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:58:34,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:58:34,513 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:58:34,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:58:34,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:58:34,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:58:34,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:58:34,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:58:34,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:58:34,515 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:58:34,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:58:34,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:58:34,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:58:34,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:58:34,960 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:58:34,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-10-24 00:58:35,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e6afbe00/f0ded52e45144564ac33d73e0e580776/FLAG8d70cb86f [2020-10-24 00:58:35,828 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:58:35,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-10-24 00:58:35,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e6afbe00/f0ded52e45144564ac33d73e0e580776/FLAG8d70cb86f [2020-10-24 00:58:36,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e6afbe00/f0ded52e45144564ac33d73e0e580776 [2020-10-24 00:58:36,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:58:36,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:58:36,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:58:36,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:58:36,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:58:36,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f07e433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36, skipping insertion in model container [2020-10-24 00:58:36,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:58:36,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:58:36,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:58:36,429 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:58:36,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:58:36,497 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:58:36,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36 WrapperNode [2020-10-24 00:58:36,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:58:36,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:58:36,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:58:36,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:58:36,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... [2020-10-24 00:58:36,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:58:36,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:58:36,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:58:36,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:58:36,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:58:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:58:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:58:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:58:36,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:58:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:58:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:58:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:58:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:58:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:58:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:58:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:58:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:58:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:58:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:58:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:58:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:58:37,532 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:58:37,533 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 00:58:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:58:37 BoogieIcfgContainer [2020-10-24 00:58:37,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:58:37,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:58:37,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:58:37,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:58:37,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:58:36" (1/3) ... [2020-10-24 00:58:37,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe36b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:58:37, skipping insertion in model container [2020-10-24 00:58:37,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:58:36" (2/3) ... [2020-10-24 00:58:37,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe36b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:58:37, skipping insertion in model container [2020-10-24 00:58:37,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:58:37" (3/3) ... [2020-10-24 00:58:37,546 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-24 00:58:37,560 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:58:37,566 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:58:37,582 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:58:37,609 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:58:37,610 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:58:37,610 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:58:37,610 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:58:37,610 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:58:37,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:58:37,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:58:37,611 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:58:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-24 00:58:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-24 00:58:37,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:37,657 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] [2020-10-24 00:58:37,657 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -29840839, now seen corresponding path program 1 times [2020-10-24 00:58:37,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:37,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303298884] [2020-10-24 00:58:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:38,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:38,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303298884] [2020-10-24 00:58:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:38,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:38,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561798613] [2020-10-24 00:58:38,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:38,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:38,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:38,172 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-24 00:58:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:38,880 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2020-10-24 00:58:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:38,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-24 00:58:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:38,899 INFO L225 Difference]: With dead ends: 291 [2020-10-24 00:58:38,900 INFO L226 Difference]: Without dead ends: 200 [2020-10-24 00:58:38,904 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 [2020-10-24 00:58:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-24 00:58:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-24 00:58:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-24 00:58:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2020-10-24 00:58:39,014 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 88 [2020-10-24 00:58:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:39,015 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2020-10-24 00:58:39,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2020-10-24 00:58:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-24 00:58:39,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:39,019 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] [2020-10-24 00:58:39,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:58:39,020 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -282351705, now seen corresponding path program 1 times [2020-10-24 00:58:39,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:39,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988803221] [2020-10-24 00:58:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:39,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:39,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988803221] [2020-10-24 00:58:39,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:39,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:39,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026704315] [2020-10-24 00:58:39,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:39,239 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand 4 states. [2020-10-24 00:58:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:39,701 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2020-10-24 00:58:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:39,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-24 00:58:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:39,705 INFO L225 Difference]: With dead ends: 239 [2020-10-24 00:58:39,705 INFO L226 Difference]: Without dead ends: 236 [2020-10-24 00:58:39,707 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 [2020-10-24 00:58:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-24 00:58:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2020-10-24 00:58:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-24 00:58:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2020-10-24 00:58:39,754 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 89 [2020-10-24 00:58:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:39,755 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2020-10-24 00:58:39,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2020-10-24 00:58:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-24 00:58:39,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:39,759 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] [2020-10-24 00:58:39,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:58:39,759 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash -917522190, now seen corresponding path program 1 times [2020-10-24 00:58:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:39,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916539437] [2020-10-24 00:58:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:39,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:39,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916539437] [2020-10-24 00:58:39,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:39,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:39,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769887835] [2020-10-24 00:58:39,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:39,889 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand 4 states. [2020-10-24 00:58:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:40,345 INFO L93 Difference]: Finished difference Result 475 states and 657 transitions. [2020-10-24 00:58:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:40,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-24 00:58:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:40,349 INFO L225 Difference]: With dead ends: 475 [2020-10-24 00:58:40,349 INFO L226 Difference]: Without dead ends: 333 [2020-10-24 00:58:40,351 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 [2020-10-24 00:58:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-24 00:58:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2020-10-24 00:58:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-24 00:58:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-24 00:58:40,420 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 449 transitions. Word has length 89 [2020-10-24 00:58:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:40,420 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-24 00:58:40,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 449 transitions. [2020-10-24 00:58:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-24 00:58:40,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:40,424 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] [2020-10-24 00:58:40,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:58:40,425 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2121163263, now seen corresponding path program 1 times [2020-10-24 00:58:40,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010771451] [2020-10-24 00:58:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:40,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010771451] [2020-10-24 00:58:40,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:40,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:40,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904893520] [2020-10-24 00:58:40,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:40,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:40,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:40,524 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 4 states. [2020-10-24 00:58:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:40,968 INFO L93 Difference]: Finished difference Result 404 states and 556 transitions. [2020-10-24 00:58:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:40,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-24 00:58:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:40,972 INFO L225 Difference]: With dead ends: 404 [2020-10-24 00:58:40,972 INFO L226 Difference]: Without dead ends: 401 [2020-10-24 00:58:40,973 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 [2020-10-24 00:58:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-24 00:58:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2020-10-24 00:58:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-24 00:58:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 447 transitions. [2020-10-24 00:58:41,038 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 447 transitions. Word has length 90 [2020-10-24 00:58:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:41,038 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 447 transitions. [2020-10-24 00:58:41,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 447 transitions. [2020-10-24 00:58:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-24 00:58:41,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:41,040 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] [2020-10-24 00:58:41,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:58:41,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1629138533, now seen corresponding path program 1 times [2020-10-24 00:58:41,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:41,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128971631] [2020-10-24 00:58:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:41,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:41,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128971631] [2020-10-24 00:58:41,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:41,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:41,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208105658] [2020-10-24 00:58:41,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:41,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:41,129 INFO L87 Difference]: Start difference. First operand 332 states and 447 transitions. Second operand 4 states. [2020-10-24 00:58:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:41,579 INFO L93 Difference]: Finished difference Result 868 states and 1210 transitions. [2020-10-24 00:58:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:41,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-24 00:58:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:41,584 INFO L225 Difference]: With dead ends: 868 [2020-10-24 00:58:41,584 INFO L226 Difference]: Without dead ends: 593 [2020-10-24 00:58:41,587 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 [2020-10-24 00:58:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-24 00:58:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 592. [2020-10-24 00:58:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-10-24 00:58:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 811 transitions. [2020-10-24 00:58:41,681 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 811 transitions. Word has length 90 [2020-10-24 00:58:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:41,681 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 811 transitions. [2020-10-24 00:58:41,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 811 transitions. [2020-10-24 00:58:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 00:58:41,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:41,684 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] [2020-10-24 00:58:41,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 00:58:41,684 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash -679272525, now seen corresponding path program 1 times [2020-10-24 00:58:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:41,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032340836] [2020-10-24 00:58:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:41,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:41,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032340836] [2020-10-24 00:58:41,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:41,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:41,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880851248] [2020-10-24 00:58:41,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:41,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:41,790 INFO L87 Difference]: Start difference. First operand 592 states and 811 transitions. Second operand 4 states. [2020-10-24 00:58:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:42,294 INFO L93 Difference]: Finished difference Result 724 states and 1006 transitions. [2020-10-24 00:58:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:42,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-24 00:58:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:42,299 INFO L225 Difference]: With dead ends: 724 [2020-10-24 00:58:42,300 INFO L226 Difference]: Without dead ends: 721 [2020-10-24 00:58:42,301 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 [2020-10-24 00:58:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-10-24 00:58:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 592. [2020-10-24 00:58:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-10-24 00:58:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 807 transitions. [2020-10-24 00:58:42,424 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 807 transitions. Word has length 91 [2020-10-24 00:58:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:42,424 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 807 transitions. [2020-10-24 00:58:42,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 807 transitions. [2020-10-24 00:58:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 00:58:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:42,426 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] [2020-10-24 00:58:42,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 00:58:42,427 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1028746146, now seen corresponding path program 1 times [2020-10-24 00:58:42,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:42,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020600908] [2020-10-24 00:58:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:42,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020600908] [2020-10-24 00:58:42,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:42,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:42,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223153232] [2020-10-24 00:58:42,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:42,534 INFO L87 Difference]: Start difference. First operand 592 states and 807 transitions. Second operand 4 states. [2020-10-24 00:58:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:43,238 INFO L93 Difference]: Finished difference Result 1636 states and 2274 transitions. [2020-10-24 00:58:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:43,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-24 00:58:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:43,251 INFO L225 Difference]: With dead ends: 1636 [2020-10-24 00:58:43,251 INFO L226 Difference]: Without dead ends: 1101 [2020-10-24 00:58:43,254 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 [2020-10-24 00:58:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-24 00:58:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1100. [2020-10-24 00:58:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2020-10-24 00:58:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1507 transitions. [2020-10-24 00:58:43,409 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1507 transitions. Word has length 91 [2020-10-24 00:58:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:43,410 INFO L481 AbstractCegarLoop]: Abstraction has 1100 states and 1507 transitions. [2020-10-24 00:58:43,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1507 transitions. [2020-10-24 00:58:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 00:58:43,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:43,412 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] [2020-10-24 00:58:43,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 00:58:43,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1818781039, now seen corresponding path program 1 times [2020-10-24 00:58:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:43,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6746568] [2020-10-24 00:58:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:43,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6746568] [2020-10-24 00:58:43,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:43,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113860836] [2020-10-24 00:58:43,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:43,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:43,532 INFO L87 Difference]: Start difference. First operand 1100 states and 1507 transitions. Second operand 4 states. [2020-10-24 00:58:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:44,200 INFO L93 Difference]: Finished difference Result 3136 states and 4342 transitions. [2020-10-24 00:58:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:44,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-24 00:58:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:44,213 INFO L225 Difference]: With dead ends: 3136 [2020-10-24 00:58:44,213 INFO L226 Difference]: Without dead ends: 2093 [2020-10-24 00:58:44,217 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 [2020-10-24 00:58:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-10-24 00:58:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2092. [2020-10-24 00:58:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-10-24 00:58:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2859 transitions. [2020-10-24 00:58:44,510 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2859 transitions. Word has length 92 [2020-10-24 00:58:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:44,511 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2859 transitions. [2020-10-24 00:58:44,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2859 transitions. [2020-10-24 00:58:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 00:58:44,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:44,517 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] [2020-10-24 00:58:44,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 00:58:44,517 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1593424501, now seen corresponding path program 1 times [2020-10-24 00:58:44,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:44,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805206724] [2020-10-24 00:58:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:44,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:44,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805206724] [2020-10-24 00:58:44,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:44,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:44,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935576624] [2020-10-24 00:58:44,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:44,634 INFO L87 Difference]: Start difference. First operand 2092 states and 2859 transitions. Second operand 4 states. [2020-10-24 00:58:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:45,485 INFO L93 Difference]: Finished difference Result 2560 states and 3534 transitions. [2020-10-24 00:58:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:45,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-24 00:58:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:45,499 INFO L225 Difference]: With dead ends: 2560 [2020-10-24 00:58:45,499 INFO L226 Difference]: Without dead ends: 2557 [2020-10-24 00:58:45,501 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 [2020-10-24 00:58:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-10-24 00:58:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2092. [2020-10-24 00:58:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-10-24 00:58:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2843 transitions. [2020-10-24 00:58:45,829 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2843 transitions. Word has length 92 [2020-10-24 00:58:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:45,829 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2843 transitions. [2020-10-24 00:58:45,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2843 transitions. [2020-10-24 00:58:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-24 00:58:45,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:45,833 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, 1] [2020-10-24 00:58:45,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 00:58:45,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 132646847, now seen corresponding path program 1 times [2020-10-24 00:58:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:45,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360113016] [2020-10-24 00:58:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:45,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360113016] [2020-10-24 00:58:45,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:45,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777724298] [2020-10-24 00:58:45,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:45,952 INFO L87 Difference]: Start difference. First operand 2092 states and 2843 transitions. Second operand 4 states. [2020-10-24 00:58:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:46,672 INFO L93 Difference]: Finished difference Result 2544 states and 3486 transitions. [2020-10-24 00:58:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:46,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-24 00:58:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:46,685 INFO L225 Difference]: With dead ends: 2544 [2020-10-24 00:58:46,685 INFO L226 Difference]: Without dead ends: 2541 [2020-10-24 00:58:46,687 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 [2020-10-24 00:58:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2020-10-24 00:58:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2092. [2020-10-24 00:58:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-10-24 00:58:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2827 transitions. [2020-10-24 00:58:47,021 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2827 transitions. Word has length 93 [2020-10-24 00:58:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:47,021 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2827 transitions. [2020-10-24 00:58:47,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2827 transitions. [2020-10-24 00:58:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-24 00:58:47,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:47,024 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, 1] [2020-10-24 00:58:47,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 00:58:47,025 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -540047414, now seen corresponding path program 1 times [2020-10-24 00:58:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:47,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544108204] [2020-10-24 00:58:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:47,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544108204] [2020-10-24 00:58:47,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:47,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611019865] [2020-10-24 00:58:47,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:47,113 INFO L87 Difference]: Start difference. First operand 2092 states and 2827 transitions. Second operand 4 states. [2020-10-24 00:58:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:48,023 INFO L93 Difference]: Finished difference Result 6064 states and 8238 transitions. [2020-10-24 00:58:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:48,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-24 00:58:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:48,042 INFO L225 Difference]: With dead ends: 6064 [2020-10-24 00:58:48,042 INFO L226 Difference]: Without dead ends: 4029 [2020-10-24 00:58:48,049 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 [2020-10-24 00:58:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2020-10-24 00:58:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4028. [2020-10-24 00:58:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2020-10-24 00:58:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5403 transitions. [2020-10-24 00:58:48,666 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5403 transitions. Word has length 93 [2020-10-24 00:58:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:48,667 INFO L481 AbstractCegarLoop]: Abstraction has 4028 states and 5403 transitions. [2020-10-24 00:58:48,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5403 transitions. [2020-10-24 00:58:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-24 00:58:48,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:48,671 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, 1, 1] [2020-10-24 00:58:48,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 00:58:48,672 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash 446000829, now seen corresponding path program 1 times [2020-10-24 00:58:48,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:48,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911118707] [2020-10-24 00:58:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911118707] [2020-10-24 00:58:48,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:48,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811583635] [2020-10-24 00:58:48,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:48,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:48,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:48,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:48,785 INFO L87 Difference]: Start difference. First operand 4028 states and 5403 transitions. Second operand 4 states. [2020-10-24 00:58:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:50,050 INFO L93 Difference]: Finished difference Result 11776 states and 15838 transitions. [2020-10-24 00:58:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:50,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-24 00:58:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:50,088 INFO L225 Difference]: With dead ends: 11776 [2020-10-24 00:58:50,089 INFO L226 Difference]: Without dead ends: 7805 [2020-10-24 00:58:50,100 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 [2020-10-24 00:58:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-10-24 00:58:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7804. [2020-10-24 00:58:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-10-24 00:58:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10363 transitions. [2020-10-24 00:58:51,199 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10363 transitions. Word has length 94 [2020-10-24 00:58:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:51,199 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10363 transitions. [2020-10-24 00:58:51,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10363 transitions. [2020-10-24 00:58:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-24 00:58:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:51,205 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, 1, 1] [2020-10-24 00:58:51,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 00:58:51,206 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2101262615, now seen corresponding path program 1 times [2020-10-24 00:58:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:51,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584404244] [2020-10-24 00:58:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584404244] [2020-10-24 00:58:51,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:51,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:51,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422801985] [2020-10-24 00:58:51,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:51,282 INFO L87 Difference]: Start difference. First operand 7804 states and 10363 transitions. Second operand 4 states. [2020-10-24 00:58:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:52,792 INFO L93 Difference]: Finished difference Result 9408 states and 12542 transitions. [2020-10-24 00:58:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:52,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-24 00:58:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:52,841 INFO L225 Difference]: With dead ends: 9408 [2020-10-24 00:58:52,841 INFO L226 Difference]: Without dead ends: 9405 [2020-10-24 00:58:52,846 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 [2020-10-24 00:58:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2020-10-24 00:58:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 7804. [2020-10-24 00:58:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-10-24 00:58:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10299 transitions. [2020-10-24 00:58:53,738 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10299 transitions. Word has length 94 [2020-10-24 00:58:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:53,738 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10299 transitions. [2020-10-24 00:58:53,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10299 transitions. [2020-10-24 00:58:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:58:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:53,746 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, 1, 1, 1] [2020-10-24 00:58:53,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 00:58:53,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1296146485, now seen corresponding path program 1 times [2020-10-24 00:58:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:53,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501210186] [2020-10-24 00:58:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:53,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501210186] [2020-10-24 00:58:53,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:53,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:53,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680846142] [2020-10-24 00:58:53,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:53,815 INFO L87 Difference]: Start difference. First operand 7804 states and 10299 transitions. Second operand 4 states. [2020-10-24 00:58:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:55,140 INFO L93 Difference]: Finished difference Result 9344 states and 12350 transitions. [2020-10-24 00:58:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:55,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-24 00:58:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:55,162 INFO L225 Difference]: With dead ends: 9344 [2020-10-24 00:58:55,162 INFO L226 Difference]: Without dead ends: 9341 [2020-10-24 00:58:55,167 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 [2020-10-24 00:58:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-10-24 00:58:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7804. [2020-10-24 00:58:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-10-24 00:58:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10235 transitions. [2020-10-24 00:58:55,991 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10235 transitions. Word has length 95 [2020-10-24 00:58:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:58:55,992 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10235 transitions. [2020-10-24 00:58:55,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:58:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10235 transitions. [2020-10-24 00:58:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:58:55,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:58:55,998 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, 1, 1, 1] [2020-10-24 00:58:55,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 00:58:55,999 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:58:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:58:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash 948736822, now seen corresponding path program 1 times [2020-10-24 00:58:55,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:58:56,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434975517] [2020-10-24 00:58:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:58:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:56,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:58:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:58:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:58:56,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434975517] [2020-10-24 00:58:56,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:58:56,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:58:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226867507] [2020-10-24 00:58:56,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:58:56,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:58:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:58:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:58:56,115 INFO L87 Difference]: Start difference. First operand 7804 states and 10235 transitions. Second operand 4 states. [2020-10-24 00:58:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:58:58,432 INFO L93 Difference]: Finished difference Result 22912 states and 30078 transitions. [2020-10-24 00:58:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:58:58,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-24 00:58:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:58:58,468 INFO L225 Difference]: With dead ends: 22912 [2020-10-24 00:58:58,469 INFO L226 Difference]: Without dead ends: 15165 [2020-10-24 00:58:58,489 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 [2020-10-24 00:58:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2020-10-24 00:59:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15164. [2020-10-24 00:59:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-10-24 00:59:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19643 transitions. [2020-10-24 00:59:00,206 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19643 transitions. Word has length 95 [2020-10-24 00:59:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19643 transitions. [2020-10-24 00:59:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19643 transitions. [2020-10-24 00:59:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 00:59:00,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:00,218 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, 1, 1, 1, 1] [2020-10-24 00:59:00,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 00:59:00,219 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash 758365347, now seen corresponding path program 1 times [2020-10-24 00:59:00,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:00,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129508536] [2020-10-24 00:59:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:00,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129508536] [2020-10-24 00:59:00,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:00,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:00,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551779401] [2020-10-24 00:59:00,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:00,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:00,302 INFO L87 Difference]: Start difference. First operand 15164 states and 19643 transitions. Second operand 4 states. [2020-10-24 00:59:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:59:02,377 INFO L93 Difference]: Finished difference Result 17984 states and 23230 transitions. [2020-10-24 00:59:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:59:02,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-24 00:59:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:59:02,421 INFO L225 Difference]: With dead ends: 17984 [2020-10-24 00:59:02,422 INFO L226 Difference]: Without dead ends: 17981 [2020-10-24 00:59:02,429 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 [2020-10-24 00:59:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2020-10-24 00:59:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15164. [2020-10-24 00:59:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-10-24 00:59:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19515 transitions. [2020-10-24 00:59:04,478 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19515 transitions. Word has length 96 [2020-10-24 00:59:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:04,478 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19515 transitions. [2020-10-24 00:59:04,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19515 transitions. [2020-10-24 00:59:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 00:59:04,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:04,489 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, 1, 1, 1, 1] [2020-10-24 00:59:04,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 00:59:04,489 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -646305047, now seen corresponding path program 1 times [2020-10-24 00:59:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:04,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208905038] [2020-10-24 00:59:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208905038] [2020-10-24 00:59:04,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:04,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:04,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438808971] [2020-10-24 00:59:04,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:04,556 INFO L87 Difference]: Start difference. First operand 15164 states and 19515 transitions. Second operand 4 states. [2020-10-24 00:59:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:59:07,939 INFO L93 Difference]: Finished difference Result 44608 states and 57406 transitions. [2020-10-24 00:59:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:59:07,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-24 00:59:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:59:08,009 INFO L225 Difference]: With dead ends: 44608 [2020-10-24 00:59:08,009 INFO L226 Difference]: Without dead ends: 29501 [2020-10-24 00:59:08,054 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 [2020-10-24 00:59:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2020-10-24 00:59:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29500. [2020-10-24 00:59:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-10-24 00:59:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37435 transitions. [2020-10-24 00:59:11,921 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37435 transitions. Word has length 96 [2020-10-24 00:59:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:11,921 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37435 transitions. [2020-10-24 00:59:11,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37435 transitions. [2020-10-24 00:59:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 00:59:11,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:11,938 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, 1, 1, 1, 1, 1] [2020-10-24 00:59:11,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 00:59:11,938 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash 23734231, now seen corresponding path program 1 times [2020-10-24 00:59:11,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143437016] [2020-10-24 00:59:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:12,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143437016] [2020-10-24 00:59:12,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:12,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:12,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498387768] [2020-10-24 00:59:12,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:12,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:12,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:12,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:12,012 INFO L87 Difference]: Start difference. First operand 29500 states and 37435 transitions. Second operand 4 states. [2020-10-24 00:59:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:59:16,140 INFO L93 Difference]: Finished difference Result 34624 states and 43582 transitions. [2020-10-24 00:59:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:59:16,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-24 00:59:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:59:16,189 INFO L225 Difference]: With dead ends: 34624 [2020-10-24 00:59:16,189 INFO L226 Difference]: Without dead ends: 34621 [2020-10-24 00:59:16,198 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 [2020-10-24 00:59:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2020-10-24 00:59:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29500. [2020-10-24 00:59:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-10-24 00:59:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37179 transitions. [2020-10-24 00:59:19,930 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37179 transitions. Word has length 97 [2020-10-24 00:59:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:19,930 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37179 transitions. [2020-10-24 00:59:19,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37179 transitions. [2020-10-24 00:59:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 00:59:19,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:19,942 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, 1, 1, 1, 1, 1] [2020-10-24 00:59:19,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 00:59:19,942 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1447016098, now seen corresponding path program 1 times [2020-10-24 00:59:19,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:19,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963616769] [2020-10-24 00:59:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:20,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963616769] [2020-10-24 00:59:20,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:20,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:20,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491370433] [2020-10-24 00:59:20,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:20,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:20,040 INFO L87 Difference]: Start difference. First operand 29500 states and 37179 transitions. Second operand 4 states. [2020-10-24 00:59:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:59:27,377 INFO L93 Difference]: Finished difference Result 86848 states and 109374 transitions. [2020-10-24 00:59:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:59:27,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-24 00:59:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:59:27,467 INFO L225 Difference]: With dead ends: 86848 [2020-10-24 00:59:27,468 INFO L226 Difference]: Without dead ends: 57405 [2020-10-24 00:59:27,535 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 [2020-10-24 00:59:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2020-10-24 00:59:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57404. [2020-10-24 00:59:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-10-24 00:59:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 71227 transitions. [2020-10-24 00:59:34,975 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 71227 transitions. Word has length 97 [2020-10-24 00:59:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:34,975 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 71227 transitions. [2020-10-24 00:59:34,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 71227 transitions. [2020-10-24 00:59:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-24 00:59:34,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:34,996 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, 1, 1, 1, 1, 1, 1] [2020-10-24 00:59:34,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 00:59:34,996 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1274982353, now seen corresponding path program 1 times [2020-10-24 00:59:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:34,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963430979] [2020-10-24 00:59:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:35,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:35,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963430979] [2020-10-24 00:59:35,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:35,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:35,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732250952] [2020-10-24 00:59:35,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:35,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:35,073 INFO L87 Difference]: Start difference. First operand 57404 states and 71227 transitions. Second operand 4 states. [2020-10-24 00:59:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:59:43,254 INFO L93 Difference]: Finished difference Result 66624 states and 81470 transitions. [2020-10-24 00:59:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:59:43,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-24 00:59:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:59:43,322 INFO L225 Difference]: With dead ends: 66624 [2020-10-24 00:59:43,323 INFO L226 Difference]: Without dead ends: 66621 [2020-10-24 00:59:43,335 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 [2020-10-24 00:59:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2020-10-24 00:59:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57404. [2020-10-24 00:59:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-10-24 00:59:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 70715 transitions. [2020-10-24 00:59:50,538 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 70715 transitions. Word has length 98 [2020-10-24 00:59:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:59:50,539 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 70715 transitions. [2020-10-24 00:59:50,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:59:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 70715 transitions. [2020-10-24 00:59:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-24 00:59:50,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:59:50,561 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, 1, 1, 1, 1, 1, 1] [2020-10-24 00:59:50,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 00:59:50,561 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:59:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:59:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1915473685, now seen corresponding path program 1 times [2020-10-24 00:59:50,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:59:50,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210396966] [2020-10-24 00:59:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:59:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:50,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:59:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:59:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:59:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210396966] [2020-10-24 00:59:50,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:59:50,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:59:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728190061] [2020-10-24 00:59:50,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:59:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:59:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:59:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:59:50,640 INFO L87 Difference]: Start difference. First operand 57404 states and 70715 transitions. Second operand 4 states. [2020-10-24 01:00:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:00:04,765 INFO L93 Difference]: Finished difference Result 169023 states and 207933 transitions. [2020-10-24 01:00:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:00:04,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-24 01:00:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:00:04,867 INFO L225 Difference]: With dead ends: 169023 [2020-10-24 01:00:04,867 INFO L226 Difference]: Without dead ends: 57404 [2020-10-24 01:00:05,162 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 [2020-10-24 01:00:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57404 states. [2020-10-24 01:00:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57404 to 57404. [2020-10-24 01:00:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-10-24 01:00:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 68667 transitions. [2020-10-24 01:00:12,124 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 68667 transitions. Word has length 98 [2020-10-24 01:00:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:00:12,124 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 68667 transitions. [2020-10-24 01:00:12,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:00:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 68667 transitions. [2020-10-24 01:00:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-24 01:00:12,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:00:12,142 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:00:12,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 01:00:12,142 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:00:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:00:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1414488035, now seen corresponding path program 1 times [2020-10-24 01:00:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:00:12,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86838100] [2020-10-24 01:00:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:00:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:00:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:00:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:00:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:00:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86838100] [2020-10-24 01:00:12,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:00:12,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:00:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443642060] [2020-10-24 01:00:12,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:00:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:00:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:00:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:00:12,220 INFO L87 Difference]: Start difference. First operand 57404 states and 68667 transitions. Second operand 4 states. [2020-10-24 01:00:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:00:19,432 INFO L93 Difference]: Finished difference Result 57404 states and 68667 transitions. [2020-10-24 01:00:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:00:19,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-24 01:00:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:00:19,433 INFO L225 Difference]: With dead ends: 57404 [2020-10-24 01:00:19,433 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 01:00:19,504 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 [2020-10-24 01:00:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 01:00:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 01:00:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 01:00:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 01:00:19,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2020-10-24 01:00:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:00:19,506 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 01:00:19,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:00:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 01:00:19,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 01:00:19,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 01:00:19,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 01:00:39,995 WARN L193 SmtUtils]: Spent 20.35 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-10-24 01:00:44,497 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2020-10-24 01:01:45,748 WARN L193 SmtUtils]: Spent 1.02 m on a formula simplification that was a NOOP. DAG size: 2125 [2020-10-24 01:02:04,303 WARN L193 SmtUtils]: Spent 18.53 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2020-10-24 01:02:07,736 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2020-10-24 01:02:10,635 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2020-10-24 01:02:12,464 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-10-24 01:02:16,708 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2020-10-24 01:03:08,362 WARN L193 SmtUtils]: Spent 51.64 s on a formula simplification. DAG size of input: 5285 DAG size of output: 31 [2020-10-24 01:03:16,199 WARN L193 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2020-10-24 01:03:26,702 WARN L193 SmtUtils]: Spent 10.49 s on a formula simplification. DAG size of input: 3010 DAG size of output: 53 [2020-10-24 01:03:41,732 WARN L193 SmtUtils]: Spent 15.02 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-10-24 01:03:57,878 WARN L193 SmtUtils]: Spent 16.13 s on a formula simplification. DAG size of input: 2752 DAG size of output: 41 [2020-10-24 01:04:02,652 WARN L193 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2020-10-24 01:04:37,267 WARN L193 SmtUtils]: Spent 34.60 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2020-10-24 01:04:38,461 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2020-10-24 01:04:49,493 WARN L193 SmtUtils]: Spent 11.02 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2020-10-24 01:04:51,693 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2020-10-24 01:04:53,816 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2020-10-24 01:06:00,001 WARN L193 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-10-24 01:06:06,895 WARN L193 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2020-10-24 01:06:08,446 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2020-10-24 01:06:30,527 WARN L193 SmtUtils]: Spent 22.07 s on a formula simplification. DAG size of input: 3778 DAG size of output: 45 [2020-10-24 01:06:38,966 WARN L193 SmtUtils]: Spent 8.43 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2020-10-24 01:06:58,723 WARN L193 SmtUtils]: Spent 19.74 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-10-24 01:08:04,269 WARN L193 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-10-24 01:08:53,076 WARN L193 SmtUtils]: Spent 48.79 s on a formula simplification. DAG size of input: 5235 DAG size of output: 31 [2020-10-24 01:09:03,935 WARN L193 SmtUtils]: Spent 10.85 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2020-10-24 01:09:05,240 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2020-10-24 01:09:12,906 WARN L193 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2020-10-24 01:09:14,785 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-10-24 01:09:18,017 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 1600 DAG size of output: 55 [2020-10-24 01:09:44,635 WARN L193 SmtUtils]: Spent 26.59 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2020-10-24 01:10:16,882 WARN L193 SmtUtils]: Spent 32.23 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2020-10-24 01:10:18,761 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2020-10-24 01:10:34,382 WARN L193 SmtUtils]: Spent 15.62 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-10-24 01:11:37,084 WARN L193 SmtUtils]: Spent 1.04 m on a formula simplification. DAG size of input: 5314 DAG size of output: 39 [2020-10-24 01:11:42,303 WARN L193 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2020-10-24 01:11:46,448 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2020-10-24 01:12:38,935 WARN L193 SmtUtils]: Spent 52.47 s on a formula simplification. DAG size of input: 5307 DAG size of output: 31 [2020-10-24 01:12:43,060 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31