/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:38:42,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:38:42,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:38:42,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:38:42,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:38:42,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:38:42,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:38:42,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:38:42,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:38:42,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:38:42,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:38:42,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:38:42,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:38:42,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:38:42,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:38:42,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:38:42,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:38:42,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:38:42,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:38:42,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:38:42,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:38:42,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:38:42,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:38:42,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:38:42,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:38:42,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:38:42,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:38:42,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:38:42,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:38:42,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:38:42,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:38:42,523 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:38:42,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:38:42,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:38:42,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:38:42,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:38:42,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:38:42,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:38:42,524 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:38:42,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:38:42,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:38:42,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:38:42,999 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:38:42,999 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:38:43,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-24 02:38:43,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b5325f2/94af087e651a4d8eafb2c5f4c3bbc80b/FLAGdcf4af853 [2020-10-24 02:38:43,767 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:38:43,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-24 02:38:43,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b5325f2/94af087e651a4d8eafb2c5f4c3bbc80b/FLAGdcf4af853 [2020-10-24 02:38:44,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b5325f2/94af087e651a4d8eafb2c5f4c3bbc80b [2020-10-24 02:38:44,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:38:44,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:38:44,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:38:44,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:38:44,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:38:44,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da179a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44, skipping insertion in model container [2020-10-24 02:38:44,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:38:44,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:38:44,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:38:44,463 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:38:44,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:38:44,505 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:38:44,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44 WrapperNode [2020-10-24 02:38:44,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:38:44,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:38:44,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:38:44,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:38:44,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 02:38:44,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:38:44,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:38:44,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:38:44,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:38:44,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:38:44,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:38:44,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:38:44,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:38:44,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:38:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:38:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:38:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:38:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:38:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:38:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:38:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:38:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:38:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:38:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:38:44,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:38:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:38:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:38:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:38:44,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:38:44,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:38:45,039 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:38:45,039 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:38:45,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:45 BoogieIcfgContainer [2020-10-24 02:38:45,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:38:45,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:38:45,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:38:45,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:38:45,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:38:44" (1/3) ... [2020-10-24 02:38:45,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2096bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:45, skipping insertion in model container [2020-10-24 02:38:45,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (2/3) ... [2020-10-24 02:38:45,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2096bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:45, skipping insertion in model container [2020-10-24 02:38:45,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:45" (3/3) ... [2020-10-24 02:38:45,051 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-10-24 02:38:45,063 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:38:45,069 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:38:45,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:38:45,132 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:38:45,132 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:38:45,132 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:38:45,132 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:38:45,133 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:38:45,133 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:38:45,133 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:38:45,133 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:38:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-24 02:38:45,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 02:38:45,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:45,165 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] [2020-10-24 02:38:45,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:45,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1036611502, now seen corresponding path program 1 times [2020-10-24 02:38:45,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:45,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053119434] [2020-10-24 02:38:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:45,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053119434] [2020-10-24 02:38:45,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:38:45,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:38:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577149677] [2020-10-24 02:38:45,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:38:45,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:38:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:38:45,638 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-10-24 02:38:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:45,769 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-24 02:38:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:38:45,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-24 02:38:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:45,781 INFO L225 Difference]: With dead ends: 65 [2020-10-24 02:38:45,781 INFO L226 Difference]: Without dead ends: 41 [2020-10-24 02:38:45,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:38:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-24 02:38:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-24 02:38:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 02:38:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-24 02:38:45,852 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-10-24 02:38:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:45,853 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-24 02:38:45,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:38:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-24 02:38:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 02:38:45,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:45,857 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] [2020-10-24 02:38:45,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:38:45,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 149107821, now seen corresponding path program 1 times [2020-10-24 02:38:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988280116] [2020-10-24 02:38:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:46,333 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 02:38:46,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:46,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988280116] [2020-10-24 02:38:46,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:38:46,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-24 02:38:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798723787] [2020-10-24 02:38:46,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:38:46,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:46,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:38:46,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:38:46,370 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 11 states. [2020-10-24 02:38:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:47,013 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-10-24 02:38:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:38:47,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-24 02:38:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:47,017 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:38:47,017 INFO L226 Difference]: Without dead ends: 81 [2020-10-24 02:38:47,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:38:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-24 02:38:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-10-24 02:38:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:38:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-24 02:38:47,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2020-10-24 02:38:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:47,037 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-24 02:38:47,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:38:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-24 02:38:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 02:38:47,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:47,039 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] [2020-10-24 02:38:47,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:38:47,040 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash 824943879, now seen corresponding path program 1 times [2020-10-24 02:38:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424453434] [2020-10-24 02:38:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:48,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424453434] [2020-10-24 02:38:48,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:48,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:38:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041745786] [2020-10-24 02:38:48,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:38:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:38:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:38:48,024 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-10-24 02:38:48,747 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:38:48,923 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-24 02:38:49,078 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-24 02:38:49,262 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-24 02:38:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:49,915 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-24 02:38:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:38:49,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-24 02:38:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:49,919 INFO L225 Difference]: With dead ends: 97 [2020-10-24 02:38:49,920 INFO L226 Difference]: Without dead ends: 91 [2020-10-24 02:38:49,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:38:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-24 02:38:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2020-10-24 02:38:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:38:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-24 02:38:49,943 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-10-24 02:38:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:49,943 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-24 02:38:49,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:38:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-24 02:38:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 02:38:49,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:49,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:49,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:38:49,946 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash 674642081, now seen corresponding path program 2 times [2020-10-24 02:38:49,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:49,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882958176] [2020-10-24 02:38:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:50,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:50,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882958176] [2020-10-24 02:38:50,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:50,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:38:50,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316336739] [2020-10-24 02:38:50,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:38:50,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:38:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:38:50,319 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 8 states. [2020-10-24 02:38:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:50,891 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-24 02:38:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:38:50,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-24 02:38:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:50,893 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:38:50,893 INFO L226 Difference]: Without dead ends: 55 [2020-10-24 02:38:50,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:38:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-24 02:38:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-24 02:38:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 02:38:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-24 02:38:50,930 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-24 02:38:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:50,931 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-24 02:38:50,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:38:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-24 02:38:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-24 02:38:50,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:50,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:50,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:38:50,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1394265352, now seen corresponding path program 1 times [2020-10-24 02:38:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:50,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17742912] [2020-10-24 02:38:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:51,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:51,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17742912] [2020-10-24 02:38:51,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:51,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-24 02:38:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974750323] [2020-10-24 02:38:51,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:38:51,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:51,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:38:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:38:51,117 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-10-24 02:38:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:51,391 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-24 02:38:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:38:51,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-24 02:38:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:51,393 INFO L225 Difference]: With dead ends: 71 [2020-10-24 02:38:51,393 INFO L226 Difference]: Without dead ends: 54 [2020-10-24 02:38:51,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:38:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-24 02:38:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-24 02:38:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-24 02:38:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-24 02:38:51,423 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2020-10-24 02:38:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:51,425 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-24 02:38:51,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:38:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-24 02:38:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-24 02:38:51,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:51,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:51,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:38:51,433 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash -200289605, now seen corresponding path program 1 times [2020-10-24 02:38:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:51,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061322469] [2020-10-24 02:38:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:53,886 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-24 02:38:54,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061322469] [2020-10-24 02:38:54,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:54,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:38:54,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408775700] [2020-10-24 02:38:54,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:38:54,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:38:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:38:54,250 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-10-24 02:38:54,755 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-24 02:38:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:55,093 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-24 02:38:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:38:55,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-24 02:38:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:55,094 INFO L225 Difference]: With dead ends: 70 [2020-10-24 02:38:55,095 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:38:55,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:38:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:38:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-24 02:38:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 02:38:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-24 02:38:55,135 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-24 02:38:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:55,136 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-24 02:38:55,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:38:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-24 02:38:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:38:55,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:55,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:55,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:38:55,137 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash -519925598, now seen corresponding path program 1 times [2020-10-24 02:38:55,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:55,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855305914] [2020-10-24 02:38:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:55,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:55,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855305914] [2020-10-24 02:38:55,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:55,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-24 02:38:55,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577146147] [2020-10-24 02:38:55,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:38:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:38:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:38:55,247 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-10-24 02:38:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:55,486 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-24 02:38:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:38:55,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-24 02:38:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:55,488 INFO L225 Difference]: With dead ends: 69 [2020-10-24 02:38:55,488 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 02:38:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:38:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 02:38:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-24 02:38:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-24 02:38:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-24 02:38:55,516 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-10-24 02:38:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:55,517 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-24 02:38:55,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:38:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-24 02:38:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:38:55,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:55,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:55,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:38:55,518 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash -713857982, now seen corresponding path program 1 times [2020-10-24 02:38:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:55,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802032678] [2020-10-24 02:38:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:56,484 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:38:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802032678] [2020-10-24 02:38:56,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:56,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:38:56,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931070430] [2020-10-24 02:38:56,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:38:56,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:38:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:38:56,809 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-10-24 02:38:57,822 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:38:58,005 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-24 02:38:58,206 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-24 02:38:58,420 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-24 02:38:58,615 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-24 02:38:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:59,030 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-24 02:38:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:38:59,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-24 02:38:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:59,032 INFO L225 Difference]: With dead ends: 80 [2020-10-24 02:38:59,033 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:38:59,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:38:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:38:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-24 02:38:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:38:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-24 02:38:59,059 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2020-10-24 02:38:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:59,060 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-24 02:38:59,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:38:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-24 02:38:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 02:38:59,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:59,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:59,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:38:59,062 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash -674897316, now seen corresponding path program 2 times [2020-10-24 02:38:59,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:59,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237997401] [2020-10-24 02:38:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:59,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:59,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237997401] [2020-10-24 02:38:59,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:59,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:38:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068832955] [2020-10-24 02:38:59,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:38:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:38:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:38:59,270 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 6 states. [2020-10-24 02:38:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:59,685 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-24 02:38:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:38:59,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-24 02:38:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:59,687 INFO L225 Difference]: With dead ends: 79 [2020-10-24 02:38:59,687 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:38:59,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:38:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:38:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-24 02:38:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-24 02:38:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-24 02:38:59,724 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2020-10-24 02:38:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:59,725 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-24 02:38:59,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:38:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-24 02:38:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-24 02:38:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:59,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:59,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:38:59,729 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1786750291, now seen corresponding path program 1 times [2020-10-24 02:38:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:59,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672315150] [2020-10-24 02:38:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672315150] [2020-10-24 02:38:59,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:59,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:38:59,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899733795] [2020-10-24 02:38:59,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:38:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:38:59,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:38:59,877 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 6 states. [2020-10-24 02:39:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:00,205 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-24 02:39:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:39:00,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-24 02:39:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:00,207 INFO L225 Difference]: With dead ends: 78 [2020-10-24 02:39:00,207 INFO L226 Difference]: Without dead ends: 61 [2020-10-24 02:39:00,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:39:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-24 02:39:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-10-24 02:39:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-24 02:39:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-24 02:39:00,230 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-24 02:39:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:00,231 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-24 02:39:00,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:39:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-24 02:39:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:39:00,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:00,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:00,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:39:00,232 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash -27526730, now seen corresponding path program 1 times [2020-10-24 02:39:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:00,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157909332] [2020-10-24 02:39:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:00,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157909332] [2020-10-24 02:39:00,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:00,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:39:00,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951836813] [2020-10-24 02:39:00,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:39:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:39:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:39:00,743 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 10 states. [2020-10-24 02:39:03,466 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 81 [2020-10-24 02:39:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:08,897 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-24 02:39:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:39:08,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-24 02:39:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:08,899 INFO L225 Difference]: With dead ends: 77 [2020-10-24 02:39:08,900 INFO L226 Difference]: Without dead ends: 60 [2020-10-24 02:39:08,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:39:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-24 02:39:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-24 02:39:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 02:39:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-24 02:39:08,936 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-10-24 02:39:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:08,936 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-24 02:39:08,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:39:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-24 02:39:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 02:39:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:08,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:08,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:39:08,938 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash 540756231, now seen corresponding path program 1 times [2020-10-24 02:39:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297799531] [2020-10-24 02:39:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:09,627 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-24 02:39:09,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:09,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297799531] [2020-10-24 02:39:09,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:09,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:39:09,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757397641] [2020-10-24 02:39:09,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:39:09,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:39:09,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:39:09,876 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 19 states. [2020-10-24 02:39:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:13,533 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-24 02:39:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:39:13,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-24 02:39:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:13,536 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:39:13,536 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:39:13,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:39:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:39:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2020-10-24 02:39:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:39:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-24 02:39:13,576 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 48 [2020-10-24 02:39:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:13,576 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-24 02:39:13,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:39:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-24 02:39:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-24 02:39:13,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:13,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:13,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:39:13,578 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:13,579 INFO L82 PathProgramCache]: Analyzing trace with hash -19669855, now seen corresponding path program 2 times [2020-10-24 02:39:13,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169705635] [2020-10-24 02:39:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:14,079 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-24 02:39:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169705635] [2020-10-24 02:39:14,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:14,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:39:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199391786] [2020-10-24 02:39:14,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:39:14,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:39:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:39:14,371 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 13 states. [2020-10-24 02:39:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:15,486 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-24 02:39:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:39:15,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-24 02:39:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:15,489 INFO L225 Difference]: With dead ends: 89 [2020-10-24 02:39:15,489 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 02:39:15,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:39:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 02:39:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-24 02:39:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:39:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-24 02:39:15,536 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-24 02:39:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:15,536 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-24 02:39:15,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:39:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-24 02:39:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 02:39:15,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:15,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:15,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:39:15,538 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1345431816, now seen corresponding path program 1 times [2020-10-24 02:39:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:15,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046580836] [2020-10-24 02:39:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:15,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:15,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046580836] [2020-10-24 02:39:15,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:15,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:39:15,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956161987] [2020-10-24 02:39:15,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:39:15,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:39:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:39:15,705 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 7 states. [2020-10-24 02:39:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:16,143 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-24 02:39:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:39:16,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-24 02:39:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:16,145 INFO L225 Difference]: With dead ends: 82 [2020-10-24 02:39:16,145 INFO L226 Difference]: Without dead ends: 65 [2020-10-24 02:39:16,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:39:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-24 02:39:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-24 02:39:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 02:39:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-24 02:39:16,177 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-10-24 02:39:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:16,177 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-24 02:39:16,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:39:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-24 02:39:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 02:39:16,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:16,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:16,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:39:16,179 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1714129221, now seen corresponding path program 1 times [2020-10-24 02:39:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:16,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119392837] [2020-10-24 02:39:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:17,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:17,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119392837] [2020-10-24 02:39:17,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:17,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:39:17,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161597946] [2020-10-24 02:39:17,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:39:17,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:39:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:39:17,062 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 21 states. [2020-10-24 02:39:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:22,977 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-24 02:39:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:39:22,977 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-24 02:39:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:22,979 INFO L225 Difference]: With dead ends: 81 [2020-10-24 02:39:22,979 INFO L226 Difference]: Without dead ends: 75 [2020-10-24 02:39:22,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:39:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-24 02:39:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-24 02:39:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:39:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-24 02:39:23,016 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2020-10-24 02:39:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:23,017 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-24 02:39:23,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:39:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-24 02:39:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 02:39:23,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:23,020 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:23,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:39:23,021 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2013851563, now seen corresponding path program 2 times [2020-10-24 02:39:23,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:23,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540298395] [2020-10-24 02:39:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:23,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540298395] [2020-10-24 02:39:23,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:23,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:39:23,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813204890] [2020-10-24 02:39:23,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:39:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:23,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:39:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:39:23,659 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 13 states. [2020-10-24 02:39:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:24,769 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-10-24 02:39:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:39:24,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-24 02:39:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:24,771 INFO L225 Difference]: With dead ends: 87 [2020-10-24 02:39:24,771 INFO L226 Difference]: Without dead ends: 70 [2020-10-24 02:39:24,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:39:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-24 02:39:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-24 02:39:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-24 02:39:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-24 02:39:24,820 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 58 [2020-10-24 02:39:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:24,821 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-24 02:39:24,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:39:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-24 02:39:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 02:39:24,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:24,828 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:24,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:39:24,829 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash -344658988, now seen corresponding path program 1 times [2020-10-24 02:39:24,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:24,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805339501] [2020-10-24 02:39:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:26,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:26,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805339501] [2020-10-24 02:39:26,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:26,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:39:26,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632471694] [2020-10-24 02:39:26,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:39:26,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:39:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:39:26,618 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 26 states. [2020-10-24 02:39:27,414 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:39:27,568 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:39:27,814 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:39:28,000 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:39:28,270 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:39:28,452 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:39:28,733 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:39:28,917 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:39:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:30,041 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-24 02:39:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:39:30,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-24 02:39:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:30,043 INFO L225 Difference]: With dead ends: 86 [2020-10-24 02:39:30,043 INFO L226 Difference]: Without dead ends: 80 [2020-10-24 02:39:30,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:39:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-24 02:39:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-10-24 02:39:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 02:39:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-24 02:39:30,094 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2020-10-24 02:39:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:30,095 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-24 02:39:30,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:39:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-24 02:39:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-24 02:39:30,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:30,096 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:30,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:39:30,096 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2075480302, now seen corresponding path program 2 times [2020-10-24 02:39:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:30,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307813449] [2020-10-24 02:39:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:31,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:32,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307813449] [2020-10-24 02:39:32,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:32,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:39:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175869833] [2020-10-24 02:39:32,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:39:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:39:32,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:39:32,052 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 28 states. [2020-10-24 02:39:32,898 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:39:33,053 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:39:33,314 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:39:33,505 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:39:33,788 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:39:33,957 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:39:34,228 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:39:34,409 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:39:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:37,834 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-24 02:39:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:39:37,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-24 02:39:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:37,835 INFO L225 Difference]: With dead ends: 104 [2020-10-24 02:39:37,835 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 02:39:37,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=325, Invalid=2125, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:39:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 02:39:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2020-10-24 02:39:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-24 02:39:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-24 02:39:37,880 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2020-10-24 02:39:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:37,880 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-24 02:39:37,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:39:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-24 02:39:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:39:37,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:37,881 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:37,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:39:37,882 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2091489544, now seen corresponding path program 3 times [2020-10-24 02:39:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:37,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829689830] [2020-10-24 02:39:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:38,574 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:39:38,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:38,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829689830] [2020-10-24 02:39:38,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:38,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:39:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102243310] [2020-10-24 02:39:38,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:39:38,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:38,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:39:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:39:38,785 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 16 states. [2020-10-24 02:39:39,098 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:39:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:40,644 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-10-24 02:39:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:39:40,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-24 02:39:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:40,647 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:39:40,647 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 02:39:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:39:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 02:39:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-10-24 02:39:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-24 02:39:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-24 02:39:40,684 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2020-10-24 02:39:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:40,684 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-24 02:39:40,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:39:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-24 02:39:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-24 02:39:40,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:40,686 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:40,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:39:40,686 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1928103551, now seen corresponding path program 4 times [2020-10-24 02:39:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:40,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047359935] [2020-10-24 02:39:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:40,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:40,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047359935] [2020-10-24 02:39:40,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:40,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:39:40,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238577272] [2020-10-24 02:39:40,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:39:40,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:39:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:39:40,901 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 10 states. [2020-10-24 02:39:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:41,931 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-24 02:39:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:39:41,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-24 02:39:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:41,933 INFO L225 Difference]: With dead ends: 100 [2020-10-24 02:39:41,933 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 02:39:41,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:39:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 02:39:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-10-24 02:39:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-24 02:39:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-24 02:39:41,981 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-24 02:39:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:41,982 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-24 02:39:41,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:39:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-24 02:39:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-24 02:39:41,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:41,983 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:41,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:39:41,983 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash -114510494, now seen corresponding path program 5 times [2020-10-24 02:39:41,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:41,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262621369] [2020-10-24 02:39:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:44,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262621369] [2020-10-24 02:39:44,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:44,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:39:44,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728482989] [2020-10-24 02:39:44,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:39:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:39:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:39:44,160 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 30 states. [2020-10-24 02:39:45,036 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:39:45,203 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:39:45,484 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:39:45,685 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:39:46,033 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:39:46,226 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:39:46,540 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:39:46,751 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:39:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:50,719 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-24 02:39:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:39:50,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-24 02:39:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:50,721 INFO L225 Difference]: With dead ends: 110 [2020-10-24 02:39:50,721 INFO L226 Difference]: Without dead ends: 90 [2020-10-24 02:39:50,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:39:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-24 02:39:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2020-10-24 02:39:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-24 02:39:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-24 02:39:50,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2020-10-24 02:39:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:50,760 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-24 02:39:50,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:39:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-24 02:39:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 02:39:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:50,760 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:50,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:39:50,761 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -298736772, now seen corresponding path program 6 times [2020-10-24 02:39:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299752875] [2020-10-24 02:39:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:51,768 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-24 02:39:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:51,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299752875] [2020-10-24 02:39:51,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:51,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:39:51,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46279505] [2020-10-24 02:39:51,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:39:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:39:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:39:51,981 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 17 states. [2020-10-24 02:39:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:53,997 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-24 02:39:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:39:54,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-24 02:39:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:54,001 INFO L225 Difference]: With dead ends: 107 [2020-10-24 02:39:54,002 INFO L226 Difference]: Without dead ends: 90 [2020-10-24 02:39:54,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:39:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-24 02:39:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-10-24 02:39:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-24 02:39:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-24 02:39:54,048 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-24 02:39:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:54,048 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-24 02:39:54,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:39:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-24 02:39:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-24 02:39:54,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:54,050 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:54,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:39:54,050 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1284291981, now seen corresponding path program 7 times [2020-10-24 02:39:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:54,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996666507] [2020-10-24 02:39:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:54,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996666507] [2020-10-24 02:39:54,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:54,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:39:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088264069] [2020-10-24 02:39:54,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:39:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:39:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:39:54,300 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 11 states. [2020-10-24 02:39:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:55,372 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-24 02:39:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:39:55,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-24 02:39:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:55,374 INFO L225 Difference]: With dead ends: 104 [2020-10-24 02:39:55,374 INFO L226 Difference]: Without dead ends: 87 [2020-10-24 02:39:55,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:39:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-24 02:39:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-24 02:39:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 02:39:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-24 02:39:55,418 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 74 [2020-10-24 02:39:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:55,418 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-24 02:39:55,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:39:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-24 02:39:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-24 02:39:55,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:55,419 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:55,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:39:55,419 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 975914887, now seen corresponding path program 8 times [2020-10-24 02:39:55,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:55,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040655432] [2020-10-24 02:39:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:57,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:57,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040655432] [2020-10-24 02:39:57,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:57,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:39:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131953017] [2020-10-24 02:39:57,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:39:57,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:39:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:39:57,942 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 32 states. [2020-10-24 02:39:58,701 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:39:58,879 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:39:59,051 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:39:59,351 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:39:59,579 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:39:59,910 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:40:00,101 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:40:00,413 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:40:00,625 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:40:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:02,924 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2020-10-24 02:40:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:40:02,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 76 [2020-10-24 02:40:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:02,928 INFO L225 Difference]: With dead ends: 103 [2020-10-24 02:40:02,928 INFO L226 Difference]: Without dead ends: 97 [2020-10-24 02:40:02,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:40:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-24 02:40:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-10-24 02:40:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 02:40:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-24 02:40:02,974 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 76 [2020-10-24 02:40:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:02,975 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-24 02:40:02,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:40:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-24 02:40:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-24 02:40:02,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:02,976 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:02,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:40:02,976 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1952408799, now seen corresponding path program 9 times [2020-10-24 02:40:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241192638] [2020-10-24 02:40:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:06,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 149 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:06,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241192638] [2020-10-24 02:40:06,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:06,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:40:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795231146] [2020-10-24 02:40:06,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:40:06,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:40:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=265, Unknown=1, NotChecked=0, Total=306 [2020-10-24 02:40:06,315 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 18 states. [2020-10-24 02:40:08,408 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:40:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:08,909 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-24 02:40:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:40:08,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-10-24 02:40:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:08,911 INFO L225 Difference]: With dead ends: 114 [2020-10-24 02:40:08,911 INFO L226 Difference]: Without dead ends: 97 [2020-10-24 02:40:08,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=118, Invalid=693, Unknown=1, NotChecked=0, Total=812 [2020-10-24 02:40:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-24 02:40:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-24 02:40:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 02:40:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-24 02:40:08,973 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-24 02:40:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:08,973 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-24 02:40:08,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:40:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-24 02:40:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-24 02:40:08,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:08,975 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:08,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:40:08,975 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1560066696, now seen corresponding path program 10 times [2020-10-24 02:40:08,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:08,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700244637] [2020-10-24 02:40:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:10,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700244637] [2020-10-24 02:40:10,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:10,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:40:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682617237] [2020-10-24 02:40:10,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:40:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:40:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:40:10,785 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 31 states. [2020-10-24 02:40:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:14,641 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-24 02:40:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:40:14,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-24 02:40:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:14,644 INFO L225 Difference]: With dead ends: 113 [2020-10-24 02:40:14,644 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 02:40:14,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:40:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 02:40:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-24 02:40:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 02:40:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-24 02:40:14,705 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 81 [2020-10-24 02:40:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:14,706 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-24 02:40:14,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:40:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-24 02:40:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 02:40:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:14,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:40:14,707 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:14,708 INFO L82 PathProgramCache]: Analyzing trace with hash 848209314, now seen corresponding path program 11 times [2020-10-24 02:40:14,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:14,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405159002] [2020-10-24 02:40:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:15,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 11 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:15,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405159002] [2020-10-24 02:40:15,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:15,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:40:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822924281] [2020-10-24 02:40:15,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:40:15,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:40:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:40:15,791 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 18 states. [2020-10-24 02:40:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:18,236 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-24 02:40:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:40:18,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-24 02:40:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:18,239 INFO L225 Difference]: With dead ends: 122 [2020-10-24 02:40:18,239 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 02:40:18,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:40:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 02:40:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-24 02:40:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-24 02:40:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-24 02:40:18,291 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 85 [2020-10-24 02:40:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:18,292 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-24 02:40:18,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:40:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-24 02:40:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 02:40:18,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:18,293 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:18,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:40:18,293 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:18,294 INFO L82 PathProgramCache]: Analyzing trace with hash -905903236, now seen corresponding path program 12 times [2020-10-24 02:40:18,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:18,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450346794] [2020-10-24 02:40:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:21,033 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:40:21,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:21,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450346794] [2020-10-24 02:40:21,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:21,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:40:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625348551] [2020-10-24 02:40:21,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:40:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:40:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:40:21,641 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 36 states. [2020-10-24 02:40:22,297 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:40:22,496 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:40:22,691 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:40:22,888 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:40:23,256 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:40:23,511 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:40:23,913 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:40:24,129 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:40:24,498 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:40:24,735 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:40:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:28,328 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-24 02:40:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:40:28,330 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2020-10-24 02:40:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:28,331 INFO L225 Difference]: With dead ends: 114 [2020-10-24 02:40:28,331 INFO L226 Difference]: Without dead ends: 108 [2020-10-24 02:40:28,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:40:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-24 02:40:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-10-24 02:40:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-24 02:40:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-24 02:40:28,388 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2020-10-24 02:40:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:28,389 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-24 02:40:28,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:40:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-24 02:40:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 02:40:28,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:28,390 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:28,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:40:28,390 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2120395626, now seen corresponding path program 13 times [2020-10-24 02:40:28,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:28,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466698354] [2020-10-24 02:40:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:31,481 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:40:31,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466698354] [2020-10-24 02:40:32,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:32,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:40:32,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585139693] [2020-10-24 02:40:32,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:40:32,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:40:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:40:32,170 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 38 states. [2020-10-24 02:40:32,876 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:40:33,085 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:40:33,299 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:40:33,536 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:40:33,962 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:40:34,231 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:40:34,679 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:40:34,909 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:40:35,308 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:40:35,557 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:40:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:39,851 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2020-10-24 02:40:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:40:39,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2020-10-24 02:40:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:39,853 INFO L225 Difference]: With dead ends: 132 [2020-10-24 02:40:39,854 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:40:39,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=440, Invalid=4390, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:40:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:40:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-24 02:40:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 02:40:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-24 02:40:39,912 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-24 02:40:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:39,913 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-24 02:40:39,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:40:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-24 02:40:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 02:40:39,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:39,914 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:39,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:40:39,914 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2112386896, now seen corresponding path program 14 times [2020-10-24 02:40:39,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:39,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56893070] [2020-10-24 02:40:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:41,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56893070] [2020-10-24 02:40:41,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:41,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:40:41,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409944358] [2020-10-24 02:40:41,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:40:41,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:40:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:40:41,599 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 21 states. [2020-10-24 02:40:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:45,664 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-24 02:40:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:40:45,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2020-10-24 02:40:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:45,666 INFO L225 Difference]: With dead ends: 129 [2020-10-24 02:40:45,666 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:40:45,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:40:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:40:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-10-24 02:40:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-24 02:40:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-24 02:40:45,733 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2020-10-24 02:40:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:45,733 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-24 02:40:45,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:40:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-24 02:40:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 02:40:45,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:45,739 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:45,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:40:45,739 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 895712985, now seen corresponding path program 15 times [2020-10-24 02:40:45,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:45,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443231632] [2020-10-24 02:40:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 25 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:46,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443231632] [2020-10-24 02:40:46,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:46,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:40:46,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980191484] [2020-10-24 02:40:46,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:40:46,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:40:46,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:40:46,167 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 15 states. [2020-10-24 02:40:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:48,200 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-24 02:40:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:40:48,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-10-24 02:40:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:48,204 INFO L225 Difference]: With dead ends: 126 [2020-10-24 02:40:48,204 INFO L226 Difference]: Without dead ends: 109 [2020-10-24 02:40:48,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:40:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-24 02:40:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-24 02:40:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-24 02:40:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-24 02:40:48,269 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 96 [2020-10-24 02:40:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:48,269 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-24 02:40:48,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:40:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-24 02:40:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-24 02:40:48,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:48,270 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:48,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:40:48,271 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654483, now seen corresponding path program 16 times [2020-10-24 02:40:48,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:48,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848910348] [2020-10-24 02:40:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:52,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848910348] [2020-10-24 02:40:52,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:52,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:40:52,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058774751] [2020-10-24 02:40:52,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:40:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:40:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:40:52,792 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 40 states. [2020-10-24 02:40:53,357 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:40:53,622 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:40:53,879 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:40:54,118 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:40:54,345 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:40:54,782 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:40:55,085 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:40:55,589 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:40:55,853 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:40:56,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:40:56,579 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:41:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:02,027 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-24 02:41:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 02:41:02,028 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 98 [2020-10-24 02:41:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:02,030 INFO L225 Difference]: With dead ends: 125 [2020-10-24 02:41:02,030 INFO L226 Difference]: Without dead ends: 119 [2020-10-24 02:41:02,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=463, Invalid=4939, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:41:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-24 02:41:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2020-10-24 02:41:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-24 02:41:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-24 02:41:02,107 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 98 [2020-10-24 02:41:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:02,107 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-24 02:41:02,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:41:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-24 02:41:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-24 02:41:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:02,108 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:02,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:41:02,109 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1123824493, now seen corresponding path program 17 times [2020-10-24 02:41:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:02,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31865853] [2020-10-24 02:41:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:03,249 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-24 02:41:03,673 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-24 02:41:04,114 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:41:04,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31865853] [2020-10-24 02:41:04,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:04,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:41:04,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578793230] [2020-10-24 02:41:04,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:41:04,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:41:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:41:04,516 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 22 states. [2020-10-24 02:41:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:09,408 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2020-10-24 02:41:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:41:09,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-24 02:41:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:09,412 INFO L225 Difference]: With dead ends: 136 [2020-10-24 02:41:09,412 INFO L226 Difference]: Without dead ends: 119 [2020-10-24 02:41:09,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:41:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-24 02:41:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-24 02:41:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 02:41:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-24 02:41:09,477 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-24 02:41:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:09,477 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-24 02:41:09,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:41:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-24 02:41:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-24 02:41:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:09,479 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:09,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:41:09,479 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1860949060, now seen corresponding path program 18 times [2020-10-24 02:41:09,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:09,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636322039] [2020-10-24 02:41:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:12,066 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-24 02:41:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:12,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636322039] [2020-10-24 02:41:12,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:12,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:41:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109675990] [2020-10-24 02:41:12,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:41:12,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:41:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1352, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:41:12,688 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 39 states. [2020-10-24 02:41:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:20,025 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-10-24 02:41:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 02:41:20,027 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 103 [2020-10-24 02:41:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:20,029 INFO L225 Difference]: With dead ends: 135 [2020-10-24 02:41:20,029 INFO L226 Difference]: Without dead ends: 129 [2020-10-24 02:41:20,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=369, Invalid=5033, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:41:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-24 02:41:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-24 02:41:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-24 02:41:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2020-10-24 02:41:20,100 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 103 [2020-10-24 02:41:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:20,100 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2020-10-24 02:41:20,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:41:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2020-10-24 02:41:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-24 02:41:20,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:20,101 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:20,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:41:20,101 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1100849962, now seen corresponding path program 19 times [2020-10-24 02:41:20,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:20,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083588741] [2020-10-24 02:41:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:22,026 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:41:24,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 373 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:24,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083588741] [2020-10-24 02:41:24,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:24,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:41:24,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359982615] [2020-10-24 02:41:24,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:41:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:41:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=455, Unknown=1, NotChecked=0, Total=506 [2020-10-24 02:41:24,457 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand 23 states. [2020-10-24 02:41:24,844 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:41:29,312 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:41:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:30,064 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-10-24 02:41:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:41:30,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-24 02:41:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:30,068 INFO L225 Difference]: With dead ends: 146 [2020-10-24 02:41:30,069 INFO L226 Difference]: Without dead ends: 122 [2020-10-24 02:41:30,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=163, Invalid=1318, Unknown=1, NotChecked=0, Total=1482 [2020-10-24 02:41:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-24 02:41:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-24 02:41:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-24 02:41:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-24 02:41:30,158 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2020-10-24 02:41:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:30,158 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-24 02:41:30,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:41:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-24 02:41:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 02:41:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:30,159 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:30,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:41:30,159 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1681128371, now seen corresponding path program 20 times [2020-10-24 02:41:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:30,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259769004] [2020-10-24 02:41:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:30,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 28 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:30,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259769004] [2020-10-24 02:41:30,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:30,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:41:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853572048] [2020-10-24 02:41:30,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:41:30,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:41:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:41:30,761 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 17 states. [2020-10-24 02:41:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:33,586 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-24 02:41:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:41:33,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-10-24 02:41:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:33,589 INFO L225 Difference]: With dead ends: 138 [2020-10-24 02:41:33,589 INFO L226 Difference]: Without dead ends: 121 [2020-10-24 02:41:33,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:41:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-24 02:41:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-24 02:41:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-24 02:41:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-24 02:41:33,659 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 110 [2020-10-24 02:41:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:33,659 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-24 02:41:33,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:41:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-24 02:41:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 02:41:33,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:33,660 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 8, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:33,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:41:33,660 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:33,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1875060755, now seen corresponding path program 21 times [2020-10-24 02:41:33,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:33,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121059053] [2020-10-24 02:41:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:38,661 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-24 02:41:39,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:39,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121059053] [2020-10-24 02:41:39,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:39,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:41:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190741505] [2020-10-24 02:41:39,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:41:39,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:39,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:41:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:41:39,697 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 44 states. [2020-10-24 02:41:40,143 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:41:40,390 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:41:40,636 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:41:40,896 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:41:41,163 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:41:41,424 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:41:41,959 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:41:42,337 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:41:43,008 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:41:43,313 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:41:43,887 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:41:44,327 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:41:51,384 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:41:51,973 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:41:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:52,951 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-10-24 02:41:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 02:41:52,953 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2020-10-24 02:41:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:52,955 INFO L225 Difference]: With dead ends: 137 [2020-10-24 02:41:52,955 INFO L226 Difference]: Without dead ends: 131 [2020-10-24 02:41:52,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=509, Invalid=6133, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:41:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-24 02:41:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2020-10-24 02:41:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-24 02:41:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-24 02:41:53,034 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 110 [2020-10-24 02:41:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:53,035 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-24 02:41:53,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:41:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-24 02:41:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-24 02:41:53,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:53,036 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 8, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:41:53,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:41:53,036 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:53,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1678215303, now seen corresponding path program 22 times [2020-10-24 02:41:53,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:53,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604202688] [2020-10-24 02:41:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:54,725 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2020-10-24 02:41:57,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 17 proven. 423 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:57,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604202688] [2020-10-24 02:41:57,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:57,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:41:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080088146] [2020-10-24 02:41:57,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:41:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:41:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=458, Unknown=1, NotChecked=0, Total=506 [2020-10-24 02:41:57,276 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 23 states. [2020-10-24 02:41:57,801 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:42:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:04,089 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2020-10-24 02:42:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:42:04,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-24 02:42:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:04,092 INFO L225 Difference]: With dead ends: 145 [2020-10-24 02:42:04,092 INFO L226 Difference]: Without dead ends: 128 [2020-10-24 02:42:04,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=167, Invalid=1392, Unknown=1, NotChecked=0, Total=1560 [2020-10-24 02:42:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-24 02:42:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-24 02:42:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-24 02:42:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-24 02:42:04,175 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 114 [2020-10-24 02:42:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:04,175 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-24 02:42:04,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:42:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-24 02:42:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-24 02:42:04,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:04,176 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:42:04,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:42:04,176 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -337416452, now seen corresponding path program 23 times [2020-10-24 02:42:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:04,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792843043] [2020-10-24 02:42:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:04,926 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-24 02:42:10,801 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:42:11,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:42:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 463 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:42:11,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792843043] [2020-10-24 02:42:11,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:42:11,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:42:11,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533537731] [2020-10-24 02:42:11,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:42:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:42:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:42:11,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:42:11,997 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 46 states. [2020-10-24 02:42:12,457 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:42:12,716 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:42:12,978 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:42:13,261 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:42:13,592 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:42:13,883 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:42:14,472 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:42:14,929 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:42:15,795 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:42:16,142 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:42:16,788 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:42:17,209 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:42:19,499 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:21,974 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:24,112 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:42:26,086 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:42:26,454 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:42:27,129 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:42:27,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:42:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:28,211 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-24 02:42:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-24 02:42:28,214 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 117 [2020-10-24 02:42:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:28,215 INFO L225 Difference]: With dead ends: 144 [2020-10-24 02:42:28,216 INFO L226 Difference]: Without dead ends: 138 [2020-10-24 02:42:28,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=532, Invalid=6778, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:42:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-24 02:42:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2020-10-24 02:42:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-24 02:42:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-24 02:42:28,297 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2020-10-24 02:42:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:28,297 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-24 02:42:28,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:42:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-24 02:42:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-24 02:42:28,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:28,298 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 9, 6, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:42:28,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:42:28,299 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:28,299 INFO L82 PathProgramCache]: Analyzing trace with hash -849477610, now seen corresponding path program 24 times [2020-10-24 02:42:28,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:28,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185996486] [2020-10-24 02:42:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:29,037 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-10-24 02:42:29,205 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-10-24 02:42:29,396 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-24 02:42:29,709 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-24 02:42:34,835 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:42:36,197 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:42:36,706 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2020-10-24 02:42:37,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:42:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:42:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185996486] [2020-10-24 02:42:37,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:42:37,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:42:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447966746] [2020-10-24 02:42:37,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:42:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:42:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:42:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:42:37,623 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 48 states. [2020-10-24 02:42:38,261 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:42:38,581 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:42:38,912 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:42:39,245 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:42:39,578 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:42:39,884 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:42:40,559 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:42:41,056 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:42:42,057 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:42:42,451 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:42:43,255 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:42:43,733 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:42:45,582 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:46,140 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:42:46,499 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:48,541 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:49,444 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:51,227 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:52,074 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:42:53,204 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:54,331 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:55,443 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:42:55,840 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:42:56,418 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:42:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:57,744 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-10-24 02:42:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:42:57,746 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 121 [2020-10-24 02:42:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:57,748 INFO L225 Difference]: With dead ends: 162 [2020-10-24 02:42:57,748 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 02:42:57,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=555, Invalid=7455, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:42:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 02:42:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2020-10-24 02:42:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-24 02:42:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-10-24 02:42:57,878 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2020-10-24 02:42:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:57,879 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-10-24 02:42:57,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:42:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-10-24 02:42:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 02:42:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:57,880 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:42:57,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:42:57,880 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1586918448, now seen corresponding path program 25 times [2020-10-24 02:42:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964259576] [2020-10-24 02:42:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:00,207 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-24 02:43:00,883 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:43:01,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:43:01,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964259576] [2020-10-24 02:43:01,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:43:01,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:43:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941145429] [2020-10-24 02:43:01,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:43:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:01,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:43:01,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:43:01,455 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 26 states. [2020-10-24 02:43:02,042 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:43:08,971 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:43:10,782 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:43:11,268 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:43:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:12,723 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-24 02:43:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 02:43:12,727 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2020-10-24 02:43:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:12,729 INFO L225 Difference]: With dead ends: 159 [2020-10-24 02:43:12,729 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 02:43:12,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:43:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 02:43:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-10-24 02:43:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-24 02:43:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-24 02:43:12,825 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2020-10-24 02:43:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:12,825 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-24 02:43:12,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:43:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-24 02:43:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-24 02:43:12,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:12,827 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 9, 6, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:43:12,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:43:12,827 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash -389938343, now seen corresponding path program 26 times [2020-10-24 02:43:12,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:12,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200621384] [2020-10-24 02:43:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:13,474 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-10-24 02:43:13,658 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-10-24 02:43:13,862 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-10-24 02:43:14,061 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-24 02:43:20,841 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-24 02:43:22,526 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:43:23,202 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2020-10-24 02:43:23,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:43:24,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200621384] [2020-10-24 02:43:24,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:43:24,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:43:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127614393] [2020-10-24 02:43:24,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:43:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:43:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:43:24,236 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 50 states. [2020-10-24 02:43:24,922 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:43:25,267 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:43:25,638 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:43:26,025 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:43:26,417 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:43:26,746 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:43:27,605 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:43:28,183 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:43:29,379 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:43:29,834 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:43:30,851 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:43:31,438 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:43:33,686 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:34,339 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:43:34,778 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:36,908 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:43:37,321 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:38,435 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:40,275 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:43:40,733 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:41,810 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:43:43,232 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:44,654 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:46,003 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:43:47,004 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:43:47,499 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:43:48,292 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:43:48,867 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:43:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:49,891 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2020-10-24 02:43:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-24 02:43:49,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 126 [2020-10-24 02:43:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:49,897 INFO L225 Difference]: With dead ends: 167 [2020-10-24 02:43:49,897 INFO L226 Difference]: Without dead ends: 147 [2020-10-24 02:43:49,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=578, Invalid=8164, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 02:43:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-24 02:43:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2020-10-24 02:43:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-24 02:43:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-24 02:43:50,011 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 126 [2020-10-24 02:43:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:50,011 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-24 02:43:50,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:43:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-24 02:43:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-24 02:43:50,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:50,012 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 9, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:43:50,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:43:50,013 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1441865203, now seen corresponding path program 27 times [2020-10-24 02:43:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694088428] [2020-10-24 02:43:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:52,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-24 02:43:52,877 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-24 02:43:53,641 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:43:54,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:43:54,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694088428] [2020-10-24 02:43:54,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:43:54,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:43:54,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62390423] [2020-10-24 02:43:54,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:43:54,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:43:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:43:54,385 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 27 states. [2020-10-24 02:43:55,069 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:43:55,690 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:43:56,522 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:43:57,273 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:43:57,905 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:43:58,426 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:43:58,919 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:43:59,657 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:00,415 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:01,020 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:01,694 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:02,233 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:03,058 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:03,641 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:04,548 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:05,312 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:05,948 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:44:06,697 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:44:07,207 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:44:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:08,950 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2020-10-24 02:44:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:44:08,954 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2020-10-24 02:44:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:08,956 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:44:08,956 INFO L226 Difference]: Without dead ends: 146 [2020-10-24 02:44:08,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:44:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-24 02:44:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-10-24 02:44:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-24 02:44:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-24 02:44:09,115 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 130 [2020-10-24 02:44:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:09,116 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-24 02:44:09,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:44:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-24 02:44:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-24 02:44:09,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:09,117 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:44:09,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:44:09,117 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:09,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:09,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1633244275, now seen corresponding path program 28 times [2020-10-24 02:44:09,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:09,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493271227] [2020-10-24 02:44:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:12,789 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2020-10-24 02:44:13,477 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-24 02:44:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 38 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:44:14,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493271227] [2020-10-24 02:44:14,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:44:14,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:44:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628585135] [2020-10-24 02:44:14,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:44:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:44:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:44:14,125 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 25 states. [2020-10-24 02:44:14,883 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:44:15,689 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:44:16,753 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:44:17,728 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:44:18,627 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:19,452 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:20,155 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:21,146 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:22,166 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:22,980 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:23,916 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:24,727 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:25,803 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:26,656 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:27,725 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:28,770 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:29,480 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:44:30,387 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:44:31,050 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-24 02:44:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:36,760 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2020-10-24 02:44:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:44:36,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 132 [2020-10-24 02:44:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:36,767 INFO L225 Difference]: With dead ends: 162 [2020-10-24 02:44:36,767 INFO L226 Difference]: Without dead ends: 145 [2020-10-24 02:44:36,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:44:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-24 02:44:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-10-24 02:44:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-24 02:44:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-24 02:44:36,866 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 132 [2020-10-24 02:44:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:36,866 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-24 02:44:36,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:44:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-24 02:44:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-24 02:44:36,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:36,867 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 10, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:44:36,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:44:36,867 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1991847408, now seen corresponding path program 29 times [2020-10-24 02:44:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343058084] [2020-10-24 02:44:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:38,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 37 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:44:38,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343058084] [2020-10-24 02:44:38,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:44:38,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:44:38,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865071858] [2020-10-24 02:44:38,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:44:38,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:44:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:44:38,192 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 21 states. [2020-10-24 02:44:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:46,361 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2020-10-24 02:44:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:44:46,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 133 [2020-10-24 02:44:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:46,368 INFO L225 Difference]: With dead ends: 161 [2020-10-24 02:44:46,369 INFO L226 Difference]: Without dead ends: 144 [2020-10-24 02:44:46,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:44:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-24 02:44:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-24 02:44:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-24 02:44:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-24 02:44:46,469 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 133 [2020-10-24 02:44:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:46,469 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-24 02:44:46,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:44:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-24 02:44:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-24 02:44:46,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:46,470 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 10, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:44:46,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:44:46,470 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2109187504, now seen corresponding path program 30 times [2020-10-24 02:44:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323765800] [2020-10-24 02:44:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:47,068 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-10-24 02:44:47,234 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-10-24 02:44:47,434 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-10-24 02:44:47,623 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-24 02:44:47,830 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-24 02:44:48,245 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-24 02:44:48,469 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-24 02:44:49,004 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-24 02:44:57,574 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:44:58,145 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-24 02:44:58,748 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-24 02:44:59,618 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:45:00,436 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2020-10-24 02:45:01,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:45:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:45:01,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323765800] [2020-10-24 02:45:01,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:45:01,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:45:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145215786] [2020-10-24 02:45:01,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:45:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:45:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:45:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2486, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:45:01,795 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 52 states. [2020-10-24 02:45:02,652 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:45:03,129 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:45:03,628 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:45:04,135 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:45:04,658 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:45:05,104 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:45:06,256 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:45:07,033 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:45:08,673 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:45:09,289 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:45:10,701 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:45:11,494 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:45:12,600 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:45:13,018 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:14,578 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:15,492 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:45:16,216 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:17,402 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:45:17,888 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:45:19,142 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:45:19,712 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:21,293 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:22,346 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:45:23,678 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:45:24,307 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:25,673 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:45:26,116 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:45:27,566 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:28,827 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:45:29,419 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:30,633 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:45:31,299 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:32,692 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:34,214 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:45:34,916 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:45:36,251 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:45:37,001 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:45:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:38,324 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-10-24 02:45:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-24 02:45:38,329 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 133 [2020-10-24 02:45:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:38,330 INFO L225 Difference]: With dead ends: 160 [2020-10-24 02:45:38,330 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 02:45:38,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=601, Invalid=8905, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 02:45:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 02:45:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2020-10-24 02:45:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-24 02:45:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2020-10-24 02:45:38,441 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2020-10-24 02:45:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:45:38,441 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2020-10-24 02:45:38,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:45:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2020-10-24 02:45:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-24 02:45:38,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:45:38,443 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 10, 7, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:45:38,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:45:38,443 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:45:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:45:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1477426378, now seen corresponding path program 31 times [2020-10-24 02:45:38,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:45:38,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301050743] [2020-10-24 02:45:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:45:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:41,511 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-24 02:45:42,243 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-24 02:45:43,110 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-24 02:45:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:45:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 719 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:45:43,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301050743] [2020-10-24 02:45:43,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:45:43,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:45:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790975803] [2020-10-24 02:45:43,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:45:43,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:45:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:45:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:45:43,969 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand 28 states. [2020-10-24 02:45:44,795 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:45:45,619 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:45:46,591 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:47,529 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:48,355 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:45:49,169 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:49,804 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:50,617 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:51,633 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:52,407 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:53,304 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:54,013 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:55,060 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:55,934 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:56,935 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:58,207 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:59,053 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:45:59,940 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:46:01,274 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:46:01,937 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:46:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:46:04,061 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2020-10-24 02:46:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:46:04,067 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-24 02:46:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:46:04,068 INFO L225 Difference]: With dead ends: 170 [2020-10-24 02:46:04,068 INFO L226 Difference]: Without dead ends: 153 [2020-10-24 02:46:04,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:46:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-24 02:46:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2020-10-24 02:46:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-24 02:46:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-24 02:46:04,193 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 137 [2020-10-24 02:46:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:46:04,194 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-24 02:46:04,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:46:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-24 02:46:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-24 02:46:04,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:46:04,195 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 11, 7, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:46:04,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:46:04,195 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:46:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:46:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1818693468, now seen corresponding path program 32 times [2020-10-24 02:46:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:46:04,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538687081] [2020-10-24 02:46:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:46:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:05,025 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-10-24 02:46:05,168 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-10-24 02:46:05,321 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-10-24 02:46:10,560 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-10-24 02:46:11,416 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-10-24 02:46:12,163 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-24 02:46:12,877 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-24 02:46:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:46:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:46:13,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538687081] [2020-10-24 02:46:13,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:46:13,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-24 02:46:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70676478] [2020-10-24 02:46:13,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 02:46:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:46:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 02:46:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:46:13,805 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 51 states. [2020-10-24 02:46:15,846 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 02:46:16,151 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 02:46:17,163 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:46:17,554 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:46:18,578 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:46:18,975 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:46:20,090 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:46:20,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:46:37,953 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:46:38,396 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:46:39,369 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:46:40,575 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:46:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:46:42,034 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-10-24 02:46:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-24 02:46:42,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 139 [2020-10-24 02:46:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:46:42,042 INFO L225 Difference]: With dead ends: 169 [2020-10-24 02:46:42,042 INFO L226 Difference]: Without dead ends: 163 [2020-10-24 02:46:42,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=471, Invalid=9035, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 02:46:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-24 02:46:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2020-10-24 02:46:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-24 02:46:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-24 02:46:42,155 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 139 [2020-10-24 02:46:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:46:42,155 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-24 02:46:42,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 02:46:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-24 02:46:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-24 02:46:42,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:46:42,156 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 11, 7, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:46:42,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:46:42,157 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:46:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:46:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1247121986, now seen corresponding path program 33 times [2020-10-24 02:46:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:46:42,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738419090] [2020-10-24 02:46:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:46:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:42,584 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-10-24 02:46:45,585 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 14 [2020-10-24 02:46:46,632 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2020-10-24 02:46:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:46:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 23 proven. 777 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:46:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738419090] [2020-10-24 02:46:55,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:46:55,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:46:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740993400] [2020-10-24 02:46:55,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:46:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:46:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:46:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=695, Unknown=4, NotChecked=0, Total=756 [2020-10-24 02:46:55,681 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 28 states. [2020-10-24 02:46:56,597 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:46:57,502 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:46:58,570 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:46:59,626 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:00,598 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 02:47:01,351 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:02,017 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:02,927 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:03,984 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:04,818 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:05,748 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:06,600 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:07,727 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:08,644 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:09,763 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:10,967 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:11,783 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:12,686 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:13,800 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:14,995 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:15,619 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:47:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:47:17,339 INFO L93 Difference]: Finished difference Result 179 states and 193 transitions. [2020-10-24 02:47:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:47:17,346 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 143 [2020-10-24 02:47:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:47:17,348 INFO L225 Difference]: With dead ends: 179 [2020-10-24 02:47:17,348 INFO L226 Difference]: Without dead ends: 157 [2020-10-24 02:47:17,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=212, Invalid=2234, Unknown=4, NotChecked=0, Total=2450 [2020-10-24 02:47:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-24 02:47:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-10-24 02:47:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-24 02:47:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2020-10-24 02:47:17,495 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2020-10-24 02:47:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:47:17,495 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2020-10-24 02:47:17,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:47:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2020-10-24 02:47:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-24 02:47:17,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:47:17,496 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 16, 12, 8, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:47:17,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:47:17,497 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:47:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:47:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash -73122299, now seen corresponding path program 34 times [2020-10-24 02:47:17,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:47:17,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021702247] [2020-10-24 02:47:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:47:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:47:18,018 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-10-24 02:47:18,182 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-10-24 02:47:18,353 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-10-24 02:47:18,556 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-10-24 02:47:18,786 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-24 02:47:19,045 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-24 02:47:19,276 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-24 02:47:19,503 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-24 02:47:19,726 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-24 02:47:19,916 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-10-24 02:47:20,120 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:47:20,403 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-24 02:47:21,431 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:47:21,731 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:47:23,178 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:47:33,361 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:47:34,181 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-24 02:47:35,032 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-24 02:47:36,006 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-24 02:47:36,747 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-10-24 02:47:37,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:47:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:47:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:47:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021702247] [2020-10-24 02:47:38,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:47:38,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:47:38,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736849012] [2020-10-24 02:47:38,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:47:38,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:47:38,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:47:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2902, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:47:38,522 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand 56 states. [2020-10-24 02:47:39,631 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:47:40,207 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:47:40,815 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:47:41,447 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:47:42,098 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:47:42,611 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:47:44,107 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:47:45,058 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:47:47,059 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:47:47,813 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:47:49,452 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:47:50,418 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:47:51,866 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:47:52,393 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:47:53,562 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:47:54,324 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:47:55,467 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:47:56,249 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:47:57,630 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:47:58,137 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:47:59,807 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:48:00,673 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:01,907 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:02,665 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:04,114 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:04,683 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:48:06,013 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:48:06,766 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:08,919 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:48:09,527 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:48:10,599 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:11,345 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:12,903 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:13,706 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:15,280 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:16,008 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:16,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:17,643 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:18,962 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:19,714 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:21,508 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:48:22,038 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:48:23,319 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:48:24,115 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:48:24,939 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:48:26,775 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:48:27,717 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:48:28,732 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:48:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:48:29,364 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2020-10-24 02:48:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-24 02:48:29,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-10-24 02:48:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:48:29,371 INFO L225 Difference]: With dead ends: 173 [2020-10-24 02:48:29,371 INFO L226 Difference]: Without dead ends: 167 [2020-10-24 02:48:29,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=647, Invalid=10483, Unknown=0, NotChecked=0, Total=11130 [2020-10-24 02:48:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-24 02:48:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2020-10-24 02:48:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 02:48:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-24 02:48:29,503 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 146 [2020-10-24 02:48:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:48:29,504 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-24 02:48:29,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:48:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-24 02:48:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-24 02:48:29,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:48:29,505 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 16, 12, 8, 6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:48:29,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 02:48:29,505 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:48:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:48:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1654530719, now seen corresponding path program 35 times [2020-10-24 02:48:29,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:48:29,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640596881] [2020-10-24 02:48:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:48:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:29,940 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2020-10-24 02:48:30,113 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-10-24 02:48:30,325 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-10-24 02:48:30,565 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-10-24 02:48:30,811 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-10-24 02:48:31,080 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-10-24 02:48:31,364 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-24 02:48:31,603 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-24 02:48:31,847 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-24 02:48:32,090 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-24 02:48:32,312 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-10-24 02:48:32,529 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:48:32,798 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-24 02:48:33,788 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:34,064 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:35,261 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:37,515 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:38,381 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:39,753 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:40,778 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:41,829 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:42,917 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:44,079 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:44,683 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:46,575 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:48:47,293 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:48:48,351 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:48:49,249 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-24 02:48:50,188 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-24 02:48:51,217 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-24 02:48:52,162 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-10-24 02:48:53,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:48:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:48:54,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640596881] [2020-10-24 02:48:54,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:48:54,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:48:54,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355095916] [2020-10-24 02:48:54,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:48:54,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:48:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:48:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3122, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:48:54,274 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 58 states. [2020-10-24 02:48:55,544 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:48:56,360 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:48:57,084 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:48:57,757 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:48:58,451 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:48:58,983 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:49:00,560 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:49:01,673 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:49:04,143 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:49:05,062 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:49:07,182 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:49:08,313 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:49:09,988 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:49:10,609 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:49:12,028 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:12,926 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:14,270 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:15,164 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:16,757 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:17,347 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:49:19,240 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:20,173 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:21,508 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:22,359 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:24,009 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:24,621 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:49:26,031 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:26,855 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:28,949 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:29,562 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:49:30,758 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:31,584 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:33,376 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:34,224 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:35,956 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:36,771 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:37,837 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:38,633 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:40,104 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:40,931 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:43,067 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:43,831 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:49:45,335 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:49:46,310 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:48,522 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:49,459 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:49:50,356 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:49:51,581 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:49:52,652 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:49:53,196 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:49:53,741 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:49:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:49:54,428 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2020-10-24 02:49:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-24 02:49:54,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 150 [2020-10-24 02:49:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:49:54,436 INFO L225 Difference]: With dead ends: 191 [2020-10-24 02:49:54,436 INFO L226 Difference]: Without dead ends: 171 [2020-10-24 02:49:54,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=670, Invalid=11320, Unknown=0, NotChecked=0, Total=11990 [2020-10-24 02:49:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-24 02:49:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2020-10-24 02:49:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-24 02:49:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-24 02:49:54,571 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 150 [2020-10-24 02:49:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:49:54,572 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-24 02:49:54,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:49:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-24 02:49:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-24 02:49:54,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:49:54,573 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 16, 12, 8, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:49:54,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 02:49:54,573 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:49:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:49:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 981477945, now seen corresponding path program 36 times [2020-10-24 02:49:54,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:49:54,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237136686] [2020-10-24 02:49:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:49:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:54,944 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2020-10-24 02:49:55,110 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-10-24 02:49:58,128 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2020-10-24 02:49:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:49:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 48 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:49:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237136686] [2020-10-24 02:49:59,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:49:59,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:49:59,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866169423] [2020-10-24 02:49:59,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:49:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:49:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:49:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:49:59,412 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 28 states. [2020-10-24 02:49:59,740 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 02:50:00,498 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:50:01,411 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 02:50:02,511 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:03,470 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:04,300 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:05,009 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:05,610 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:06,423 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:07,383 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:08,114 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:09,115 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:09,807 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:10,687 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:11,371 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:12,254 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:13,130 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:13,742 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:14,414 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:15,277 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:16,046 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:16,912 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:50:17,919 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:50:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:19,850 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2020-10-24 02:50:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 02:50:19,857 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-10-24 02:50:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:19,859 INFO L225 Difference]: With dead ends: 188 [2020-10-24 02:50:19,859 INFO L226 Difference]: Without dead ends: 171 [2020-10-24 02:50:19,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:50:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-24 02:50:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2020-10-24 02:50:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-24 02:50:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2020-10-24 02:50:20,013 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 154 [2020-10-24 02:50:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:20,013 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2020-10-24 02:50:20,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:50:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2020-10-24 02:50:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 02:50:20,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:20,014 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 17, 12, 8, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:50:20,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 02:50:20,015 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1978724752, now seen corresponding path program 37 times [2020-10-24 02:50:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076509650] [2020-10-24 02:50:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:22,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 47 proven. 940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:50:22,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076509650] [2020-10-24 02:50:22,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:50:22,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:50:22,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651017588] [2020-10-24 02:50:22,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:50:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:22,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:50:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:50:22,485 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand 25 states. [2020-10-24 02:50:24,050 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:24,937 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:25,824 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:26,632 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:27,308 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:27,868 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:28,773 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:29,644 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:30,337 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:31,165 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:32,638 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:33,394 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:34,211 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:35,042 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:35,592 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:36,254 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:37,209 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:37,958 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:38,761 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 02:50:39,328 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 02:50:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:40,692 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2020-10-24 02:50:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:50:40,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 155 [2020-10-24 02:50:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:40,701 INFO L225 Difference]: With dead ends: 187 [2020-10-24 02:50:40,701 INFO L226 Difference]: Without dead ends: 170 [2020-10-24 02:50:40,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:50:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-24 02:50:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2020-10-24 02:50:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-24 02:50:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-24 02:50:40,838 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2020-10-24 02:50:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:40,838 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-24 02:50:40,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:50:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-24 02:50:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-24 02:50:40,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:40,839 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 17, 13, 8, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:50:40,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 02:50:40,840 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1683767725, now seen corresponding path program 38 times [2020-10-24 02:50:40,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:40,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255359912] [2020-10-24 02:50:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:41,277 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2020-10-24 02:50:41,435 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-10-24 02:50:41,649 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-10-24 02:50:41,898 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-10-24 02:50:42,189 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-10-24 02:50:42,531 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-10-24 02:50:42,908 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-24 02:50:43,222 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-24 02:50:43,506 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-24 02:50:43,770 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-24 02:50:44,013 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-10-24 02:50:44,256 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:50:44,545 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-24 02:50:45,613 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:45,927 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:50:46,252 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:47,235 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:50:47,617 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:48,436 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:49,686 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:50:50,182 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:50,684 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:50:52,150 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:53,209 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:54,354 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:55,591 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:56,892 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:50:57,578 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:50:58,987 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2020-10-24 02:50:59,742 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:51:00,459 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:51:01,198 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-10-24 02:51:01,978 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-24 02:51:03,064 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-10-24 02:51:04,127 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-24 02:51:05,210 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-24 02:51:06,300 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-24 02:51:07,259 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-10-24 02:51:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:51:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:51:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:51:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255359912] [2020-10-24 02:51:09,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:51:09,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:51:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282945236] [2020-10-24 02:51:09,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:51:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:51:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:51:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3350, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:51:09,583 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 60 states. [2020-10-24 02:51:10,036 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 02:51:10,796 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:51:11,454 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-24 02:51:12,121 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-24 02:51:12,822 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-24 02:51:13,526 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-24 02:51:14,169 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-24 02:51:15,993 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:51:17,209 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-24 02:51:20,060 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-24 02:51:21,025 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-24 02:51:23,140 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 02:51:24,456 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-24 02:51:26,402 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 02:51:26,976 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 02:51:28,021 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:28,854 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:30,146 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:51:30,972 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:32,410 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:32,946 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:51:34,759 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:51:35,568 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:36,770 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:37,601 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:39,056 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:39,640 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:51:40,752 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:51:41,579 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:43,603 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:51:44,164 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:51:45,255 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:46,100 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:47,728 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:48,516 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:50,217 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:51,014 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:51,955 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:52,758 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:53,933 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:54,751 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:51:56,755 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:51:57,331 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 02:51:58,627 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 02:51:59,475 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:52:01,414 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:52:02,281 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:52:03,437 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:52:04,202 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 02:52:05,015 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-24 02:52:06,637 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-24 02:52:07,608 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:52:08,532 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 02:52:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:52:08,978 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2020-10-24 02:52:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:52:08,985 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-10-24 02:52:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:52:08,986 INFO L225 Difference]: With dead ends: 197 [2020-10-24 02:52:08,986 INFO L226 Difference]: Without dead ends: 177 [2020-10-24 02:52:08,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=693, Invalid=12189, Unknown=0, NotChecked=0, Total=12882 [2020-10-24 02:52:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-24 02:52:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2020-10-24 02:52:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-24 02:52:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-24 02:52:09,117 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 156 [2020-10-24 02:52:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:52:09,117 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-24 02:52:09,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:52:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-24 02:52:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-24 02:52:09,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:52:09,119 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 17, 13, 8, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:52:09,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-24 02:52:09,119 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:52:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:52:09,119 INFO L82 PathProgramCache]: Analyzing trace with hash -81212435, now seen corresponding path program 39 times [2020-10-24 02:52:09,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:52:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463958779] [2020-10-24 02:52:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:52:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:09,435 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2020-10-24 02:52:09,578 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-10-24 02:52:12,414 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2020-10-24 02:52:13,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:52:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:52:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 50 proven. 1021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:52:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463958779] [2020-10-24 02:52:13,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:52:13,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:52:13,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880110273] [2020-10-24 02:52:13,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:52:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:52:13,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:52:13,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:52:13,636 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 29 states. [2020-10-24 02:52:14,664 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-24 02:52:15,548 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 02:52:16,411 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41