java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:24:48,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:24:48,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:24:48,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:24:48,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:24:48,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:24:48,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:24:48,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:24:48,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:24:48,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:24:48,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:24:48,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:24:48,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:24:48,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:24:48,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:24:48,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:24:48,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:24:48,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:24:48,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:24:48,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:24:48,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 09:24:48,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:24:48,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:24:48,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:24:48,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:24:48,277 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:24:48,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:24:48,278 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:24:48,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:24:48,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:24:48,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:24:48,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:24:48,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:24:48,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:24:48,280 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:24:48,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:24:48,280 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:24:48,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:24:48,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:24:48,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:24:48,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:24:48,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:24:48,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:24:48,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:24:48,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:24:48,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:24:48,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:24:48,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:24:48,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:24:48,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:24:48,336 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:24:48,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:24:48,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:24:48,361 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:24:48,362 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:24:48,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-09-07 09:24:48,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6766a5ea/b51e26b888454136be4f24a5e12b879a/FLAGd7f307d34 [2019-09-07 09:24:48,853 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:24:48,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-09-07 09:24:48,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6766a5ea/b51e26b888454136be4f24a5e12b879a/FLAGd7f307d34 [2019-09-07 09:24:49,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6766a5ea/b51e26b888454136be4f24a5e12b879a [2019-09-07 09:24:49,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:24:49,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:24:49,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:24:49,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:24:49,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:24:49,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d71a7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49, skipping insertion in model container [2019-09-07 09:24:49,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,269 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:24:49,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:24:49,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:24:49,469 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:24:49,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:24:49,596 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:24:49,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49 WrapperNode [2019-09-07 09:24:49,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:24:49,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:24:49,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:24:49,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:24:49,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (1/1) ... [2019-09-07 09:24:49,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:24:49,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:24:49,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:24:49,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:24:49,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (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 [2019-09-07 09:24:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:24:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:24:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:24:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:24:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:24:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:24:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:24:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:24:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:24:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:24:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:24:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:24:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:24:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:24:50,034 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:24:50,035 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-09-07 09:24:50,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:24:50 BoogieIcfgContainer [2019-09-07 09:24:50,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:24:50,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:24:50,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:24:50,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:24:50,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:24:49" (1/3) ... [2019-09-07 09:24:50,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3499dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:24:50, skipping insertion in model container [2019-09-07 09:24:50,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:24:49" (2/3) ... [2019-09-07 09:24:50,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3499dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:24:50, skipping insertion in model container [2019-09-07 09:24:50,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:24:50" (3/3) ... [2019-09-07 09:24:50,047 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-09-07 09:24:50,054 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:24:50,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:24:50,076 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:24:50,102 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:24:50,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:24:50,103 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:24:50,104 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:24:50,104 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:24:50,104 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:24:50,104 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:24:50,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:24:50,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:24:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-09-07 09:24:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 09:24:50,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:50,127 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:50,129 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-09-07 09:24:50,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:50,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:50,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:24:50,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:24:50,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:24:50,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:24:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:24:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:24:50,271 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-09-07 09:24:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:50,297 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-09-07 09:24:50,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:24:50,298 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-07 09:24:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:50,308 INFO L225 Difference]: With dead ends: 82 [2019-09-07 09:24:50,308 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 09:24:50,312 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:24:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 09:24:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-07 09:24:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:24:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-09-07 09:24:50,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-09-07 09:24:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:50,357 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-09-07 09:24:50,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:24:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-09-07 09:24:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 09:24:50,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:50,358 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:50,359 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-09-07 09:24:50,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:50,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:50,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:50,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:24:50,413 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:24:50,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:24:50,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:24:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:24:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:24:50,416 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 3 states. [2019-09-07 09:24:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:50,543 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2019-09-07 09:24:50,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:24:50,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 09:24:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:50,546 INFO L225 Difference]: With dead ends: 92 [2019-09-07 09:24:50,546 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:24:50,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:24:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:24:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2019-09-07 09:24:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:24:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-09-07 09:24:50,567 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2019-09-07 09:24:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:50,568 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-09-07 09:24:50,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:24:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-09-07 09:24:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 09:24:50,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:50,569 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:50,570 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-09-07 09:24:50,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:50,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:24:50,637 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:24:50,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 09:24:50,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 09:24:50,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 09:24:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-07 09:24:50,638 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-09-07 09:24:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:50,755 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2019-09-07 09:24:50,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:24:50,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-07 09:24:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:50,757 INFO L225 Difference]: With dead ends: 94 [2019-09-07 09:24:50,758 INFO L226 Difference]: Without dead ends: 63 [2019-09-07 09:24:50,758 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:24:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-07 09:24:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2019-09-07 09:24:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 09:24:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-09-07 09:24:50,767 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 20 [2019-09-07 09:24:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:50,767 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-09-07 09:24:50,767 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 09:24:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-09-07 09:24:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:24:50,768 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:50,769 INFO L399 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] [2019-09-07 09:24:50,769 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1561235658, now seen corresponding path program 1 times [2019-09-07 09:24:50,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:50,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:50,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:50,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:24:50,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:50,840 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:24:50,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:50,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:24:50,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:24:50,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:50,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-07 09:24:50,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:24:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:24:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:24:50,972 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 7 states. [2019-09-07 09:24:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:51,162 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2019-09-07 09:24:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:24:51,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-09-07 09:24:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:51,164 INFO L225 Difference]: With dead ends: 123 [2019-09-07 09:24:51,164 INFO L226 Difference]: Without dead ends: 89 [2019-09-07 09:24:51,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:24:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-07 09:24:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2019-09-07 09:24:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 09:24:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2019-09-07 09:24:51,179 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 23 [2019-09-07 09:24:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:51,180 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2019-09-07 09:24:51,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:24:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2019-09-07 09:24:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-07 09:24:51,181 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:51,182 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:51,182 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2139625433, now seen corresponding path program 2 times [2019-09-07 09:24:51,184 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:51,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:51,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:51,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:51,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:24:51,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:51,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:51,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:24:51,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-07 09:24:51,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:51,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:24:51,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:24:51,370 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 09:24:51,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-09-07 09:24:51,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:24:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:24:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:24:51,371 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 8 states. [2019-09-07 09:24:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:51,546 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2019-09-07 09:24:51,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:24:51,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-07 09:24:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:51,548 INFO L225 Difference]: With dead ends: 114 [2019-09-07 09:24:51,548 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 09:24:51,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:24:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 09:24:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-09-07 09:24:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-07 09:24:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2019-09-07 09:24:51,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 28 [2019-09-07 09:24:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:51,567 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2019-09-07 09:24:51,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:24:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2019-09-07 09:24:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 09:24:51,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:51,569 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:51,569 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1607919396, now seen corresponding path program 1 times [2019-09-07 09:24:51,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:51,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:51,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:51,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:24:51,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:51,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:24:51,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:51,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:24:51,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:24:51,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:51,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-07 09:24:51,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:24:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:24:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:24:51,781 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand 10 states. [2019-09-07 09:24:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:52,063 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2019-09-07 09:24:52,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:24:52,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-09-07 09:24:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:52,065 INFO L225 Difference]: With dead ends: 176 [2019-09-07 09:24:52,066 INFO L226 Difference]: Without dead ends: 122 [2019-09-07 09:24:52,067 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:24:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-07 09:24:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2019-09-07 09:24:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-07 09:24:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2019-09-07 09:24:52,078 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 32 [2019-09-07 09:24:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:52,079 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2019-09-07 09:24:52,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:24:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2019-09-07 09:24:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:24:52,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:52,080 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:52,080 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:52,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1707849543, now seen corresponding path program 2 times [2019-09-07 09:24:52,081 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:52,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:52,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:52,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:52,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:24:52,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:52,210 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:24:52,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:52,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:24:52,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:52,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:24:52,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 09:24:52,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:52,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-09-07 09:24:52,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:24:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:24:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:24:52,334 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 12 states. [2019-09-07 09:24:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:52,714 INFO L93 Difference]: Finished difference Result 242 states and 332 transitions. [2019-09-07 09:24:52,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:24:52,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-09-07 09:24:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:52,716 INFO L225 Difference]: With dead ends: 242 [2019-09-07 09:24:52,716 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 09:24:52,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:24:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 09:24:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2019-09-07 09:24:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 09:24:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2019-09-07 09:24:52,730 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 37 [2019-09-07 09:24:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:52,730 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2019-09-07 09:24:52,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:24:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2019-09-07 09:24:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 09:24:52,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:52,732 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:52,732 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2011697664, now seen corresponding path program 3 times [2019-09-07 09:24:52,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:52,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:52,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:52,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:52,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:24:52,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:52,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:24:52,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:52,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 09:24:52,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:52,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:24:52,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-07 09:24:52,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:52,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-09-07 09:24:52,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:24:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:24:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:24:52,997 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand 14 states. [2019-09-07 09:24:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:53,468 INFO L93 Difference]: Finished difference Result 311 states and 428 transitions. [2019-09-07 09:24:53,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:24:53,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-09-07 09:24:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:53,471 INFO L225 Difference]: With dead ends: 311 [2019-09-07 09:24:53,471 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 09:24:53,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=741, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 09:24:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 09:24:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2019-09-07 09:24:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-07 09:24:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 222 transitions. [2019-09-07 09:24:53,487 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 222 transitions. Word has length 42 [2019-09-07 09:24:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:53,488 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 222 transitions. [2019-09-07 09:24:53,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:24:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 222 transitions. [2019-09-07 09:24:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:24:53,501 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:53,502 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:53,502 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2147025373, now seen corresponding path program 4 times [2019-09-07 09:24:53,502 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:53,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:53,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:53,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:53,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:24:53,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:53,635 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:53,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:24:53,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:24:53,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:53,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:24:53,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-07 09:24:53,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:53,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 09:24:53,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:24:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:24:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:24:53,766 INFO L87 Difference]: Start difference. First operand 167 states and 222 transitions. Second operand 16 states. [2019-09-07 09:24:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:54,429 INFO L93 Difference]: Finished difference Result 386 states and 532 transitions. [2019-09-07 09:24:54,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 09:24:54,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-09-07 09:24:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:54,433 INFO L225 Difference]: With dead ends: 386 [2019-09-07 09:24:54,434 INFO L226 Difference]: Without dead ends: 236 [2019-09-07 09:24:54,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=608, Invalid=1198, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:24:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-09-07 09:24:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2019-09-07 09:24:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-09-07 09:24:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 275 transitions. [2019-09-07 09:24:54,468 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 275 transitions. Word has length 47 [2019-09-07 09:24:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:54,469 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 275 transitions. [2019-09-07 09:24:54,469 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:24:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 275 transitions. [2019-09-07 09:24:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-07 09:24:54,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:54,473 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:54,479 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:54,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1777867556, now seen corresponding path program 5 times [2019-09-07 09:24:54,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:54,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:54,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:54,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:54,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:24:54,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:54,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:54,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:24:54,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-07 09:24:54,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:54,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:24:54,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-07 09:24:54,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:54,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-09-07 09:24:54,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:24:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:24:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:24:54,814 INFO L87 Difference]: Start difference. First operand 206 states and 275 transitions. Second operand 18 states. [2019-09-07 09:24:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:55,635 INFO L93 Difference]: Finished difference Result 467 states and 644 transitions. [2019-09-07 09:24:55,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 09:24:55,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2019-09-07 09:24:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:55,641 INFO L225 Difference]: With dead ends: 467 [2019-09-07 09:24:55,641 INFO L226 Difference]: Without dead ends: 280 [2019-09-07 09:24:55,643 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=923, Invalid=1833, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 09:24:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-09-07 09:24:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 248. [2019-09-07 09:24:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-09-07 09:24:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 332 transitions. [2019-09-07 09:24:55,662 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 332 transitions. Word has length 52 [2019-09-07 09:24:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:55,662 INFO L475 AbstractCegarLoop]: Abstraction has 248 states and 332 transitions. [2019-09-07 09:24:55,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:24:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 332 transitions. [2019-09-07 09:24:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 09:24:55,663 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:55,664 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:55,664 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 951457023, now seen corresponding path program 6 times [2019-09-07 09:24:55,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:55,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:55,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:55,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:55,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:24:55,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:55,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:55,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:24:55,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-07 09:24:55,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:55,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:24:55,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:24:55,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:55,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 16 [2019-09-07 09:24:55,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:24:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:24:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:24:55,941 INFO L87 Difference]: Start difference. First operand 248 states and 332 transitions. Second operand 16 states. [2019-09-07 09:24:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:56,223 INFO L93 Difference]: Finished difference Result 453 states and 614 transitions. [2019-09-07 09:24:56,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:24:56,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-09-07 09:24:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:56,226 INFO L225 Difference]: With dead ends: 453 [2019-09-07 09:24:56,226 INFO L226 Difference]: Without dead ends: 253 [2019-09-07 09:24:56,227 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:24:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-09-07 09:24:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2019-09-07 09:24:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2019-09-07 09:24:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 336 transitions. [2019-09-07 09:24:56,239 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 336 transitions. Word has length 57 [2019-09-07 09:24:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:56,239 INFO L475 AbstractCegarLoop]: Abstraction has 251 states and 336 transitions. [2019-09-07 09:24:56,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:24:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 336 transitions. [2019-09-07 09:24:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 09:24:56,240 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:56,240 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:56,241 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1861738138, now seen corresponding path program 7 times [2019-09-07 09:24:56,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:56,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:56,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:24:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:24:56,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:56,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:56,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:56,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:24:56,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-09-07 09:24:56,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:56,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-09-07 09:24:56,496 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:24:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:24:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:24:56,497 INFO L87 Difference]: Start difference. First operand 251 states and 336 transitions. Second operand 21 states. [2019-09-07 09:24:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:24:57,885 INFO L93 Difference]: Finished difference Result 581 states and 807 transitions. [2019-09-07 09:24:57,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 09:24:57,885 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-09-07 09:24:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:24:57,895 INFO L225 Difference]: With dead ends: 581 [2019-09-07 09:24:57,896 INFO L226 Difference]: Without dead ends: 351 [2019-09-07 09:24:57,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1730, Invalid=3526, Unknown=0, NotChecked=0, Total=5256 [2019-09-07 09:24:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-09-07 09:24:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 317. [2019-09-07 09:24:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-09-07 09:24:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 425 transitions. [2019-09-07 09:24:57,918 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 425 transitions. Word has length 60 [2019-09-07 09:24:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:24:57,918 INFO L475 AbstractCegarLoop]: Abstraction has 317 states and 425 transitions. [2019-09-07 09:24:57,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:24:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 425 transitions. [2019-09-07 09:24:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 09:24:57,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:24:57,922 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:24:57,922 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:24:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:24:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1442868867, now seen corresponding path program 8 times [2019-09-07 09:24:57,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:24:57,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:24:57,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:57,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:24:57,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:24:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:24:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:24:58,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:24:58,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:24:58,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:24:58,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:24:58,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:24:58,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:24:58,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:24:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-07 09:24:58,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:24:58,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-09-07 09:24:58,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:24:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:24:58,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:24:58,313 INFO L87 Difference]: Start difference. First operand 317 states and 425 transitions. Second operand 23 states. [2019-09-07 09:25:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:00,102 INFO L93 Difference]: Finished difference Result 698 states and 961 transitions. [2019-09-07 09:25:00,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-07 09:25:00,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2019-09-07 09:25:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:00,105 INFO L225 Difference]: With dead ends: 698 [2019-09-07 09:25:00,105 INFO L226 Difference]: Without dead ends: 404 [2019-09-07 09:25:00,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2404, Invalid=4906, Unknown=0, NotChecked=0, Total=7310 [2019-09-07 09:25:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-09-07 09:25:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 368. [2019-09-07 09:25:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2019-09-07 09:25:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 494 transitions. [2019-09-07 09:25:00,132 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 494 transitions. Word has length 65 [2019-09-07 09:25:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:00,134 INFO L475 AbstractCegarLoop]: Abstraction has 368 states and 494 transitions. [2019-09-07 09:25:00,134 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:25:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 494 transitions. [2019-09-07 09:25:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-07 09:25:00,136 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:00,136 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:00,137 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1410710794, now seen corresponding path program 9 times [2019-09-07 09:25:00,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:00,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:00,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:00,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:00,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:25:00,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:00,363 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:00,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:25:00,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 09:25:00,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:00,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:25:00,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-09-07 09:25:00,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:00,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-09-07 09:25:00,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:25:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:25:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:25:00,624 INFO L87 Difference]: Start difference. First operand 368 states and 494 transitions. Second operand 22 states. [2019-09-07 09:25:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:01,107 INFO L93 Difference]: Finished difference Result 713 states and 966 transitions. [2019-09-07 09:25:01,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:25:01,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-09-07 09:25:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:01,111 INFO L225 Difference]: With dead ends: 713 [2019-09-07 09:25:01,111 INFO L226 Difference]: Without dead ends: 377 [2019-09-07 09:25:01,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=740, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:25:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-09-07 09:25:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2019-09-07 09:25:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-09-07 09:25:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 501 transitions. [2019-09-07 09:25:01,130 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 501 transitions. Word has length 70 [2019-09-07 09:25:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:01,130 INFO L475 AbstractCegarLoop]: Abstraction has 374 states and 501 transitions. [2019-09-07 09:25:01,131 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:25:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 501 transitions. [2019-09-07 09:25:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 09:25:01,131 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:01,132 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:01,132 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 544662457, now seen corresponding path program 1 times [2019-09-07 09:25:01,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:01,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:01,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:01,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:01,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:25:01,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:01,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:25:01,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:01,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:25:01,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-07 09:25:01,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:01,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-09-07 09:25:01,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:25:01,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:25:01,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:25:01,502 INFO L87 Difference]: Start difference. First operand 374 states and 501 transitions. Second operand 26 states. [2019-09-07 09:25:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:04,596 INFO L93 Difference]: Finished difference Result 842 states and 1164 transitions. [2019-09-07 09:25:04,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-07 09:25:04,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2019-09-07 09:25:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:04,599 INFO L225 Difference]: With dead ends: 842 [2019-09-07 09:25:04,599 INFO L226 Difference]: Without dead ends: 493 [2019-09-07 09:25:04,607 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3690 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3970, Invalid=8240, Unknown=0, NotChecked=0, Total=12210 [2019-09-07 09:25:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-09-07 09:25:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 455. [2019-09-07 09:25:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-09-07 09:25:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 610 transitions. [2019-09-07 09:25:04,626 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 610 transitions. Word has length 73 [2019-09-07 09:25:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:04,627 INFO L475 AbstractCegarLoop]: Abstraction has 455 states and 610 transitions. [2019-09-07 09:25:04,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:25:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 610 transitions. [2019-09-07 09:25:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-07 09:25:04,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:04,628 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:04,628 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash -742756530, now seen corresponding path program 2 times [2019-09-07 09:25:04,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:04,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:04,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:04,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:25:04,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:25:04,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:04,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:04,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:25:04,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:25:04,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:04,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:25:04,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:25:05,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:05,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-09-07 09:25:05,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:25:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:25:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:25:05,008 INFO L87 Difference]: Start difference. First operand 455 states and 610 transitions. Second operand 28 states. [2019-09-07 09:25:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:08,070 INFO L93 Difference]: Finished difference Result 983 states and 1348 transitions. [2019-09-07 09:25:08,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-07 09:25:08,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 78 [2019-09-07 09:25:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:08,075 INFO L225 Difference]: With dead ends: 983 [2019-09-07 09:25:08,075 INFO L226 Difference]: Without dead ends: 555 [2019-09-07 09:25:08,083 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4994 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5207, Invalid=10795, Unknown=0, NotChecked=0, Total=16002 [2019-09-07 09:25:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2019-09-07 09:25:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 515. [2019-09-07 09:25:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2019-09-07 09:25:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 691 transitions. [2019-09-07 09:25:08,102 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 691 transitions. Word has length 78 [2019-09-07 09:25:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:08,103 INFO L475 AbstractCegarLoop]: Abstraction has 515 states and 691 transitions. [2019-09-07 09:25:08,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:25:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 691 transitions. [2019-09-07 09:25:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:25:08,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:08,104 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:08,104 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1419763947, now seen corresponding path program 3 times [2019-09-07 09:25:08,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:08,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:08,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:25:08,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:08,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:08,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:25:08,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:25:08,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:08,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:25:08,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:25:08,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:08,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-09-07 09:25:08,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:25:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:25:08,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:25:08,603 INFO L87 Difference]: Start difference. First operand 515 states and 691 transitions. Second operand 30 states. [2019-09-07 09:25:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:12,228 INFO L93 Difference]: Finished difference Result 1106 states and 1516 transitions. [2019-09-07 09:25:12,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-09-07 09:25:12,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2019-09-07 09:25:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:12,236 INFO L225 Difference]: With dead ends: 1106 [2019-09-07 09:25:12,236 INFO L226 Difference]: Without dead ends: 620 [2019-09-07 09:25:12,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6609 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6707, Invalid=13885, Unknown=0, NotChecked=0, Total=20592 [2019-09-07 09:25:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-09-07 09:25:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 578. [2019-09-07 09:25:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2019-09-07 09:25:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 776 transitions. [2019-09-07 09:25:12,262 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 776 transitions. Word has length 83 [2019-09-07 09:25:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:12,263 INFO L475 AbstractCegarLoop]: Abstraction has 578 states and 776 transitions. [2019-09-07 09:25:12,263 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:25:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 776 transitions. [2019-09-07 09:25:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 09:25:12,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:12,264 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:12,264 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1404472334, now seen corresponding path program 4 times [2019-09-07 09:25:12,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:12,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:12,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:12,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:12,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:25:12,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:12,467 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:12,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:25:12,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:25:12,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:12,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:25:12,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 09:25:12,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:12,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2019-09-07 09:25:12,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 09:25:12,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 09:25:12,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:25:12,709 INFO L87 Difference]: Start difference. First operand 578 states and 776 transitions. Second operand 32 states. [2019-09-07 09:25:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:17,600 INFO L93 Difference]: Finished difference Result 1235 states and 1692 transitions. [2019-09-07 09:25:17,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2019-09-07 09:25:17,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2019-09-07 09:25:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:17,604 INFO L225 Difference]: With dead ends: 1235 [2019-09-07 09:25:17,605 INFO L226 Difference]: Without dead ends: 688 [2019-09-07 09:25:17,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8504, Invalid=17578, Unknown=0, NotChecked=0, Total=26082 [2019-09-07 09:25:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-09-07 09:25:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 644. [2019-09-07 09:25:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-09-07 09:25:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 865 transitions. [2019-09-07 09:25:17,634 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 865 transitions. Word has length 88 [2019-09-07 09:25:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:17,635 INFO L475 AbstractCegarLoop]: Abstraction has 644 states and 865 transitions. [2019-09-07 09:25:17,635 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 09:25:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 865 transitions. [2019-09-07 09:25:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 09:25:17,636 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:17,636 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:17,637 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1250249329, now seen corresponding path program 5 times [2019-09-07 09:25:17,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:17,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:17,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:17,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:17,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:25:17,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:17,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:25:17,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:18,161 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-07 09:25:18,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:18,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:25:18,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 09:25:18,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:18,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2019-09-07 09:25:18,381 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 09:25:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 09:25:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 09:25:18,381 INFO L87 Difference]: Start difference. First operand 644 states and 865 transitions. Second operand 34 states. [2019-09-07 09:25:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:23,652 INFO L93 Difference]: Finished difference Result 1370 states and 1876 transitions. [2019-09-07 09:25:23,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2019-09-07 09:25:23,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2019-09-07 09:25:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:23,656 INFO L225 Difference]: With dead ends: 1370 [2019-09-07 09:25:23,656 INFO L226 Difference]: Without dead ends: 759 [2019-09-07 09:25:23,661 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10955 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10634, Invalid=21946, Unknown=0, NotChecked=0, Total=32580 [2019-09-07 09:25:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-09-07 09:25:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 713. [2019-09-07 09:25:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-09-07 09:25:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 958 transitions. [2019-09-07 09:25:23,683 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 958 transitions. Word has length 93 [2019-09-07 09:25:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:23,684 INFO L475 AbstractCegarLoop]: Abstraction has 713 states and 958 transitions. [2019-09-07 09:25:23,684 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 09:25:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 958 transitions. [2019-09-07 09:25:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-07 09:25:23,685 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:23,685 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:23,685 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:23,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1191991146, now seen corresponding path program 6 times [2019-09-07 09:25:23,686 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:23,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:23,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:23,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 09:25:23,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:23,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:25:23,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:24,446 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-07 09:25:24,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:24,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:25:24,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-07 09:25:24,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:24,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2019-09-07 09:25:24,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 09:25:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 09:25:24,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 09:25:24,692 INFO L87 Difference]: Start difference. First operand 713 states and 958 transitions. Second operand 36 states. [2019-09-07 09:25:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:31,002 INFO L93 Difference]: Finished difference Result 1511 states and 2068 transitions. [2019-09-07 09:25:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2019-09-07 09:25:31,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 98 [2019-09-07 09:25:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:31,009 INFO L225 Difference]: With dead ends: 1511 [2019-09-07 09:25:31,009 INFO L226 Difference]: Without dead ends: 833 [2019-09-07 09:25:31,015 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13785 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13135, Invalid=27065, Unknown=0, NotChecked=0, Total=40200 [2019-09-07 09:25:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2019-09-07 09:25:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 785. [2019-09-07 09:25:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2019-09-07 09:25:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1055 transitions. [2019-09-07 09:25:31,048 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1055 transitions. Word has length 98 [2019-09-07 09:25:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:31,048 INFO L475 AbstractCegarLoop]: Abstraction has 785 states and 1055 transitions. [2019-09-07 09:25:31,049 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 09:25:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1055 transitions. [2019-09-07 09:25:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-07 09:25:31,050 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:31,050 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:31,050 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash -845666867, now seen corresponding path program 7 times [2019-09-07 09:25:31,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:31,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:31,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:25:31,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:31,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:31,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:25:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:31,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:25:31,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-07 09:25:31,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:31,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2019-09-07 09:25:31,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 09:25:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 09:25:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 09:25:31,628 INFO L87 Difference]: Start difference. First operand 785 states and 1055 transitions. Second operand 38 states. [2019-09-07 09:25:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:39,376 INFO L93 Difference]: Finished difference Result 1658 states and 2268 transitions. [2019-09-07 09:25:39,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2019-09-07 09:25:39,377 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2019-09-07 09:25:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:39,381 INFO L225 Difference]: With dead ends: 1658 [2019-09-07 09:25:39,381 INFO L226 Difference]: Without dead ends: 910 [2019-09-07 09:25:39,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17124 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16047, Invalid=33015, Unknown=0, NotChecked=0, Total=49062 [2019-09-07 09:25:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-09-07 09:25:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 860. [2019-09-07 09:25:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2019-09-07 09:25:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1156 transitions. [2019-09-07 09:25:39,413 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1156 transitions. Word has length 103 [2019-09-07 09:25:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:39,413 INFO L475 AbstractCegarLoop]: Abstraction has 860 states and 1156 transitions. [2019-09-07 09:25:39,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 09:25:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1156 transitions. [2019-09-07 09:25:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 09:25:39,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:39,414 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:39,415 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 768036154, now seen corresponding path program 8 times [2019-09-07 09:25:39,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:39,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:39,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:39,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:25:39,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:25:39,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:39,773 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:25:39,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:25:39,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:39,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:25:39,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-09-07 09:25:40,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:40,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2019-09-07 09:25:40,240 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-07 09:25:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-07 09:25:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 09:25:40,241 INFO L87 Difference]: Start difference. First operand 860 states and 1156 transitions. Second operand 40 states. [2019-09-07 09:25:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:25:49,248 INFO L93 Difference]: Finished difference Result 1811 states and 2476 transitions. [2019-09-07 09:25:49,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2019-09-07 09:25:49,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 108 [2019-09-07 09:25:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:25:49,252 INFO L225 Difference]: With dead ends: 1811 [2019-09-07 09:25:49,253 INFO L226 Difference]: Without dead ends: 990 [2019-09-07 09:25:49,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21029 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=19412, Invalid=39880, Unknown=0, NotChecked=0, Total=59292 [2019-09-07 09:25:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2019-09-07 09:25:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 938. [2019-09-07 09:25:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-09-07 09:25:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1261 transitions. [2019-09-07 09:25:49,288 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1261 transitions. Word has length 108 [2019-09-07 09:25:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:25:49,288 INFO L475 AbstractCegarLoop]: Abstraction has 938 states and 1261 transitions. [2019-09-07 09:25:49,289 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-07 09:25:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1261 transitions. [2019-09-07 09:25:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 09:25:49,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:25:49,290 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 19, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:25:49,290 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:25:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:25:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1942647081, now seen corresponding path program 9 times [2019-09-07 09:25:49,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:25:49,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:25:49,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:49,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:25:49,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:25:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:25:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:25:49,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:25:49,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:25:49,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:25:50,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 09:25:50,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:25:50,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:25:50,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:25:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-09-07 09:25:50,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:25:50,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 42 [2019-09-07 09:25:50,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 09:25:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 09:25:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:25:50,521 INFO L87 Difference]: Start difference. First operand 938 states and 1261 transitions. Second operand 42 states. [2019-09-07 09:26:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:26:01,437 INFO L93 Difference]: Finished difference Result 1970 states and 2692 transitions. [2019-09-07 09:26:01,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2019-09-07 09:26:01,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 113 [2019-09-07 09:26:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:26:01,443 INFO L225 Difference]: With dead ends: 1970 [2019-09-07 09:26:01,444 INFO L226 Difference]: Without dead ends: 1073 [2019-09-07 09:26:01,451 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=23274, Invalid=47748, Unknown=0, NotChecked=0, Total=71022 [2019-09-07 09:26:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2019-09-07 09:26:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1019. [2019-09-07 09:26:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-09-07 09:26:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1370 transitions. [2019-09-07 09:26:01,493 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1370 transitions. Word has length 113 [2019-09-07 09:26:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:26:01,493 INFO L475 AbstractCegarLoop]: Abstraction has 1019 states and 1370 transitions. [2019-09-07 09:26:01,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 09:26:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1370 transitions. [2019-09-07 09:26:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-07 09:26:01,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:26:01,495 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:26:01,495 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:26:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:26:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash -514678306, now seen corresponding path program 10 times [2019-09-07 09:26:01,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:26:01,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:26:01,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:01,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:26:01,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:26:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:26:01,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:26:01,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:26:01,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:26:01,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:26:01,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:26:01,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:26:01,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:26:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-07 09:26:02,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:26:02,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2019-09-07 09:26:02,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 09:26:02,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 09:26:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:26:02,208 INFO L87 Difference]: Start difference. First operand 1019 states and 1370 transitions. Second operand 44 states. [2019-09-07 09:26:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:26:15,300 INFO L93 Difference]: Finished difference Result 2135 states and 2916 transitions. [2019-09-07 09:26:15,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2019-09-07 09:26:15,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 118 [2019-09-07 09:26:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:26:15,305 INFO L225 Difference]: With dead ends: 2135 [2019-09-07 09:26:15,305 INFO L226 Difference]: Without dead ends: 1159 [2019-09-07 09:26:15,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30780 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=27679, Invalid=56711, Unknown=0, NotChecked=0, Total=84390 [2019-09-07 09:26:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2019-09-07 09:26:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1103. [2019-09-07 09:26:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2019-09-07 09:26:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1483 transitions. [2019-09-07 09:26:15,347 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1483 transitions. Word has length 118 [2019-09-07 09:26:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:26:15,348 INFO L475 AbstractCegarLoop]: Abstraction has 1103 states and 1483 transitions. [2019-09-07 09:26:15,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 09:26:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1483 transitions. [2019-09-07 09:26:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 09:26:15,349 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:26:15,349 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:26:15,350 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:26:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:26:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash -942805883, now seen corresponding path program 11 times [2019-09-07 09:26:15,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:26:15,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:26:15,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:15,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:26:15,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:26:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:26:15,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:26:15,660 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:26:15,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:26:16,573 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-07 09:26:16,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:26:16,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:26:16,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:26:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-07 09:26:16,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:26:16,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 46 [2019-09-07 09:26:16,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 09:26:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 09:26:16,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 09:26:16,938 INFO L87 Difference]: Start difference. First operand 1103 states and 1483 transitions. Second operand 46 states. [2019-09-07 09:26:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:26:32,132 INFO L93 Difference]: Finished difference Result 2306 states and 3148 transitions. [2019-09-07 09:26:32,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2019-09-07 09:26:32,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 123 [2019-09-07 09:26:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:26:32,137 INFO L225 Difference]: With dead ends: 2306 [2019-09-07 09:26:32,137 INFO L226 Difference]: Without dead ends: 1248 [2019-09-07 09:26:32,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36755 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=32675, Invalid=66865, Unknown=0, NotChecked=0, Total=99540 [2019-09-07 09:26:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2019-09-07 09:26:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1190. [2019-09-07 09:26:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2019-09-07 09:26:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1600 transitions. [2019-09-07 09:26:32,184 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1600 transitions. Word has length 123 [2019-09-07 09:26:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:26:32,184 INFO L475 AbstractCegarLoop]: Abstraction has 1190 states and 1600 transitions. [2019-09-07 09:26:32,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 09:26:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1600 transitions. [2019-09-07 09:26:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 09:26:32,185 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:26:32,186 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:26:32,186 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:26:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:26:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1889789570, now seen corresponding path program 12 times [2019-09-07 09:26:32,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:26:32,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:26:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:32,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:26:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:26:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:26:32,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:26:32,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:26:32,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:26:34,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-07 09:26:34,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:26:34,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:26:34,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:26:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 09:26:34,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:26:34,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-09-07 09:26:34,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 09:26:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 09:26:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 09:26:34,468 INFO L87 Difference]: Start difference. First operand 1190 states and 1600 transitions. Second operand 48 states. [2019-09-07 09:26:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:26:51,296 INFO L93 Difference]: Finished difference Result 2483 states and 3388 transitions. [2019-09-07 09:26:51,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2019-09-07 09:26:51,296 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 128 [2019-09-07 09:26:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:26:51,301 INFO L225 Difference]: With dead ends: 2483 [2019-09-07 09:26:51,301 INFO L226 Difference]: Without dead ends: 1340 [2019-09-07 09:26:51,337 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43554 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=38312, Invalid=78310, Unknown=0, NotChecked=0, Total=116622 [2019-09-07 09:26:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2019-09-07 09:26:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1280. [2019-09-07 09:26:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-09-07 09:26:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1721 transitions. [2019-09-07 09:26:51,387 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1721 transitions. Word has length 128 [2019-09-07 09:26:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:26:51,387 INFO L475 AbstractCegarLoop]: Abstraction has 1280 states and 1721 transitions. [2019-09-07 09:26:51,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 09:26:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1721 transitions. [2019-09-07 09:26:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-07 09:26:51,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:26:51,389 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 23, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:26:51,389 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:26:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:26:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2077513697, now seen corresponding path program 13 times [2019-09-07 09:26:51,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:26:51,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:26:51,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:51,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:26:51,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:26:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:26:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:26:51,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:26:51,729 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:26:51,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:26:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:26:51,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:26:51,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:26:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-09-07 09:26:52,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:26:52,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-09-07 09:26:52,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 09:26:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 09:26:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 09:26:52,236 INFO L87 Difference]: Start difference. First operand 1280 states and 1721 transitions. Second operand 50 states. [2019-09-07 09:27:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:27:11,566 INFO L93 Difference]: Finished difference Result 2666 states and 3636 transitions. [2019-09-07 09:27:11,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2019-09-07 09:27:11,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 133 [2019-09-07 09:27:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:27:11,572 INFO L225 Difference]: With dead ends: 2666 [2019-09-07 09:27:11,572 INFO L226 Difference]: Without dead ends: 1435 [2019-09-07 09:27:11,581 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51249 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=44642, Invalid=91150, Unknown=0, NotChecked=0, Total=135792 [2019-09-07 09:27:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-09-07 09:27:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1373. [2019-09-07 09:27:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1373 states. [2019-09-07 09:27:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 1846 transitions. [2019-09-07 09:27:11,628 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 1846 transitions. Word has length 133 [2019-09-07 09:27:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:27:11,628 INFO L475 AbstractCegarLoop]: Abstraction has 1373 states and 1846 transitions. [2019-09-07 09:27:11,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 09:27:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 1846 transitions. [2019-09-07 09:27:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 09:27:11,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:27:11,630 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 24, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:27:11,630 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:27:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:27:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1665751846, now seen corresponding path program 14 times [2019-09-07 09:27:11,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:27:11,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:27:11,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:27:11,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:27:11,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:27:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:27:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:27:12,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:27:12,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:27:12,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:27:12,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:27:12,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:27:12,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:27:12,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:27:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 09:27:13,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:27:13,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 52 [2019-09-07 09:27:13,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-07 09:27:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-07 09:27:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 09:27:13,079 INFO L87 Difference]: Start difference. First operand 1373 states and 1846 transitions. Second operand 52 states. [2019-09-07 09:27:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:27:35,832 INFO L93 Difference]: Finished difference Result 2855 states and 3892 transitions. [2019-09-07 09:27:35,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 370 states. [2019-09-07 09:27:35,832 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 138 [2019-09-07 09:27:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:27:35,837 INFO L225 Difference]: With dead ends: 2855 [2019-09-07 09:27:35,837 INFO L226 Difference]: Without dead ends: 1533 [2019-09-07 09:27:35,844 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59915 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=51719, Invalid=105493, Unknown=0, NotChecked=0, Total=157212 [2019-09-07 09:27:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2019-09-07 09:27:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1469. [2019-09-07 09:27:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2019-09-07 09:27:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1975 transitions. [2019-09-07 09:27:35,897 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1975 transitions. Word has length 138 [2019-09-07 09:27:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:27:35,898 INFO L475 AbstractCegarLoop]: Abstraction has 1469 states and 1975 transitions. [2019-09-07 09:27:35,898 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-07 09:27:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1975 transitions. [2019-09-07 09:27:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-07 09:27:35,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:27:35,899 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 25, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:27:35,900 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:27:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:27:35,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1167029053, now seen corresponding path program 15 times [2019-09-07 09:27:35,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:27:35,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:27:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:27:35,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:27:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:27:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:27:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:27:36,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:27:36,436 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:27:36,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:27:38,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-07 09:27:38,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:27:38,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:27:38,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:27:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-09-07 09:27:39,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:27:39,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 54 [2019-09-07 09:27:39,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 09:27:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 09:27:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 09:27:39,270 INFO L87 Difference]: Start difference. First operand 1469 states and 1975 transitions. Second operand 54 states. [2019-09-07 09:28:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:28:05,161 INFO L93 Difference]: Finished difference Result 3050 states and 4156 transitions. [2019-09-07 09:28:05,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2019-09-07 09:28:05,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 143 [2019-09-07 09:28:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:28:05,167 INFO L225 Difference]: With dead ends: 3050 [2019-09-07 09:28:05,168 INFO L226 Difference]: Without dead ends: 1634 [2019-09-07 09:28:05,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69630 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=59599, Invalid=121451, Unknown=0, NotChecked=0, Total=181050 [2019-09-07 09:28:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2019-09-07 09:28:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1568. [2019-09-07 09:28:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1568 states. [2019-09-07 09:28:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2108 transitions. [2019-09-07 09:28:05,232 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2108 transitions. Word has length 143 [2019-09-07 09:28:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:28:05,232 INFO L475 AbstractCegarLoop]: Abstraction has 1568 states and 2108 transitions. [2019-09-07 09:28:05,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 09:28:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2108 transitions. [2019-09-07 09:28:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-07 09:28:05,234 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:28:05,234 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 26, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:28:05,235 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:28:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:28:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1330724810, now seen corresponding path program 16 times [2019-09-07 09:28:05,235 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:28:05,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:28:05,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:28:05,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:28:05,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:28:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:28:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:28:05,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:28:05,628 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:28:05,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:28:05,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:28:05,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:28:05,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:28:05,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:28:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-09-07 09:28:06,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:28:06,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-09-07 09:28:06,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 09:28:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 09:28:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 09:28:06,333 INFO L87 Difference]: Start difference. First operand 1568 states and 2108 transitions. Second operand 56 states. [2019-09-07 09:28:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:28:36,106 INFO L93 Difference]: Finished difference Result 3251 states and 4428 transitions. [2019-09-07 09:28:36,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2019-09-07 09:28:36,106 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 148 [2019-09-07 09:28:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:28:36,112 INFO L225 Difference]: With dead ends: 3251 [2019-09-07 09:28:36,112 INFO L226 Difference]: Without dead ends: 1738 [2019-09-07 09:28:36,121 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80475 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=68340, Invalid=139140, Unknown=0, NotChecked=0, Total=207480 [2019-09-07 09:28:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2019-09-07 09:28:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1670. [2019-09-07 09:28:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-09-07 09:28:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2245 transitions. [2019-09-07 09:28:36,180 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2245 transitions. Word has length 148 [2019-09-07 09:28:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:28:36,180 INFO L475 AbstractCegarLoop]: Abstraction has 1670 states and 2245 transitions. [2019-09-07 09:28:36,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 09:28:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2245 transitions. [2019-09-07 09:28:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-07 09:28:36,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:28:36,182 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 27, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:28:36,182 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:28:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:28:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1171194215, now seen corresponding path program 17 times [2019-09-07 09:28:36,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:28:36,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:28:36,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:28:36,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:28:36,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:28:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:28:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:28:36,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:28:36,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:28:36,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:28:40,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-09-07 09:28:40,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:28:40,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:28:40,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:28:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-09-07 09:28:41,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:28:41,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 58 [2019-09-07 09:28:41,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-07 09:28:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-07 09:28:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2436, Unknown=0, NotChecked=0, Total=3306 [2019-09-07 09:28:41,430 INFO L87 Difference]: Start difference. First operand 1670 states and 2245 transitions. Second operand 58 states. [2019-09-07 09:29:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:14,439 INFO L93 Difference]: Finished difference Result 3458 states and 4708 transitions. [2019-09-07 09:29:14,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2019-09-07 09:29:14,439 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 153 [2019-09-07 09:29:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:14,445 INFO L225 Difference]: With dead ends: 3458 [2019-09-07 09:29:14,445 INFO L226 Difference]: Without dead ends: 1845 [2019-09-07 09:29:14,454 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92534 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=78002, Invalid=158680, Unknown=0, NotChecked=0, Total=236682 [2019-09-07 09:29:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2019-09-07 09:29:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1775. [2019-09-07 09:29:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1775 states. [2019-09-07 09:29:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2386 transitions. [2019-09-07 09:29:14,520 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2386 transitions. Word has length 153 [2019-09-07 09:29:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:14,521 INFO L475 AbstractCegarLoop]: Abstraction has 1775 states and 2386 transitions. [2019-09-07 09:29:14,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-07 09:29:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2386 transitions. [2019-09-07 09:29:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-07 09:29:14,522 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:14,523 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 28, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:14,523 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash -45493138, now seen corresponding path program 18 times [2019-09-07 09:29:14,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:14,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:14,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:14,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:14,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:29:15,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:15,067 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:15,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:29:21,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2019-09-07 09:29:21,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:21,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 09:29:21,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2019-09-07 09:29:21,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:21,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 60 [2019-09-07 09:29:21,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-07 09:29:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-07 09:29:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 09:29:21,889 INFO L87 Difference]: Start difference. First operand 1775 states and 2386 transitions. Second operand 60 states. [2019-09-07 09:29:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:59,917 INFO L93 Difference]: Finished difference Result 3671 states and 4996 transitions. [2019-09-07 09:29:59,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 488 states. [2019-09-07 09:29:59,918 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 158 [2019-09-07 09:29:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:59,926 INFO L225 Difference]: With dead ends: 3671 [2019-09-07 09:29:59,926 INFO L226 Difference]: Without dead ends: 1955 [2019-09-07 09:29:59,941 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105894 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=88647, Invalid=180195, Unknown=0, NotChecked=0, Total=268842 [2019-09-07 09:29:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2019-09-07 09:30:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1883. [2019-09-07 09:30:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2019-09-07 09:30:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2531 transitions. [2019-09-07 09:30:00,004 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2531 transitions. Word has length 158 [2019-09-07 09:30:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:00,004 INFO L475 AbstractCegarLoop]: Abstraction has 1883 states and 2531 transitions. [2019-09-07 09:30:00,004 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-07 09:30:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2531 transitions. [2019-09-07 09:30:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-07 09:30:00,006 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:00,006 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 29, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:00,006 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash 711637493, now seen corresponding path program 19 times [2019-09-07 09:30:00,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:00,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:00,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:00,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:30:00,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:00,550 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:00,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:00,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:30:00,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-09-07 09:30:01,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:01,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 62 [2019-09-07 09:30:01,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 09:30:01,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 09:30:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 09:30:01,290 INFO L87 Difference]: Start difference. First operand 1883 states and 2531 transitions. Second operand 62 states. [2019-09-07 09:30:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:44,235 INFO L93 Difference]: Finished difference Result 3890 states and 5292 transitions. [2019-09-07 09:30:44,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 520 states. [2019-09-07 09:30:44,236 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 163 [2019-09-07 09:30:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:44,245 INFO L225 Difference]: With dead ends: 3890 [2019-09-07 09:30:44,245 INFO L226 Difference]: Without dead ends: 2068 [2019-09-07 09:30:44,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120645 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=100339, Invalid=203813, Unknown=0, NotChecked=0, Total=304152 [2019-09-07 09:30:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-09-07 09:30:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1994. [2019-09-07 09:30:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1994 states. [2019-09-07 09:30:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 2680 transitions. [2019-09-07 09:30:44,314 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 2680 transitions. Word has length 163 [2019-09-07 09:30:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:44,314 INFO L475 AbstractCegarLoop]: Abstraction has 1994 states and 2680 transitions. [2019-09-07 09:30:44,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 09:30:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 2680 transitions. [2019-09-07 09:30:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-09-07 09:30:44,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:44,315 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:44,315 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1941874414, now seen corresponding path program 20 times [2019-09-07 09:30:44,316 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:44,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:44,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:44,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:44,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 09:30:44,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:44,889 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:44,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:30:44,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:30:44,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:44,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 09:30:44,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-09-07 09:30:45,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:45,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 64 [2019-09-07 09:30:45,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-07 09:30:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-07 09:30:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 09:30:45,703 INFO L87 Difference]: Start difference. First operand 1994 states and 2680 transitions. Second operand 64 states. [2019-09-07 09:31:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:35,696 INFO L93 Difference]: Finished difference Result 4115 states and 5596 transitions. [2019-09-07 09:31:35,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2019-09-07 09:31:35,696 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 168 [2019-09-07 09:31:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:35,728 INFO L225 Difference]: With dead ends: 4115 [2019-09-07 09:31:35,729 INFO L226 Difference]: Without dead ends: 2184 [2019-09-07 09:31:35,770 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136880 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=113144, Invalid=229666, Unknown=0, NotChecked=0, Total=342810 [2019-09-07 09:31:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-09-07 09:31:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2108. [2019-09-07 09:31:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2108 states. [2019-09-07 09:31:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2833 transitions. [2019-09-07 09:31:35,898 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2833 transitions. Word has length 168 [2019-09-07 09:31:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:35,899 INFO L475 AbstractCegarLoop]: Abstraction has 2108 states and 2833 transitions. [2019-09-07 09:31:35,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-07 09:31:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2833 transitions. [2019-09-07 09:31:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-07 09:31:35,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:35,901 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 31, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:35,902 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2121164113, now seen corresponding path program 21 times [2019-09-07 09:31:35,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:35,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:35,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:35,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:35,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:31:36,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:36,547 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:36,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:31:41,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 09:31:41,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:41,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:31:41,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-07 09:31:42,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:42,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 66 [2019-09-07 09:31:42,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-07 09:31:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-07 09:31:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2019-09-07 09:31:42,563 INFO L87 Difference]: Start difference. First operand 2108 states and 2833 transitions. Second operand 66 states. [2019-09-07 09:32:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:32:37,175 INFO L93 Difference]: Finished difference Result 4346 states and 5908 transitions. [2019-09-07 09:32:37,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 587 states. [2019-09-07 09:32:37,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 173 [2019-09-07 09:32:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:32:37,195 INFO L225 Difference]: With dead ends: 4346 [2019-09-07 09:32:37,195 INFO L226 Difference]: Without dead ends: 2303 [2019-09-07 09:32:37,235 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154695 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=127130, Invalid=257890, Unknown=0, NotChecked=0, Total=385020 [2019-09-07 09:32:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2019-09-07 09:32:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2225. [2019-09-07 09:32:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2019-09-07 09:32:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2990 transitions. [2019-09-07 09:32:37,360 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2990 transitions. Word has length 173 [2019-09-07 09:32:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:32:37,361 INFO L475 AbstractCegarLoop]: Abstraction has 2225 states and 2990 transitions. [2019-09-07 09:32:37,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-07 09:32:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2990 transitions. [2019-09-07 09:32:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 09:32:37,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:32:37,362 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 32, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:32:37,362 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:32:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:32:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1782182474, now seen corresponding path program 22 times [2019-09-07 09:32:37,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:32:37,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:32:37,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:32:37,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:32:37,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:32:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:32:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:32:37,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:32:37,980 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:32:37,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:32:38,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:32:38,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:32:38,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 09:32:38,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:32:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-09-07 09:32:39,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:32:39,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 68 [2019-09-07 09:32:39,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-07 09:32:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-07 09:32:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 09:32:39,010 INFO L87 Difference]: Start difference. First operand 2225 states and 2990 transitions. Second operand 68 states. [2019-09-07 09:33:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:41,524 INFO L93 Difference]: Finished difference Result 4583 states and 6228 transitions. [2019-09-07 09:33:41,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 622 states. [2019-09-07 09:33:41,524 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 178 [2019-09-07 09:33:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:41,530 INFO L225 Difference]: With dead ends: 4583 [2019-09-07 09:33:41,531 INFO L226 Difference]: Without dead ends: 2425 [2019-09-07 09:33:41,553 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 655 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174189 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=142367, Invalid=288625, Unknown=0, NotChecked=0, Total=430992 [2019-09-07 09:33:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2019-09-07 09:33:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2345. [2019-09-07 09:33:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2019-09-07 09:33:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3151 transitions. [2019-09-07 09:33:41,635 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3151 transitions. Word has length 178 [2019-09-07 09:33:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:41,636 INFO L475 AbstractCegarLoop]: Abstraction has 2345 states and 3151 transitions. [2019-09-07 09:33:41,636 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-07 09:33:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3151 transitions. [2019-09-07 09:33:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-07 09:33:41,637 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:41,637 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 33, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:41,637 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 300794029, now seen corresponding path program 23 times [2019-09-07 09:33:41,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:41,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:41,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:41,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:41,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-09-07 09:33:42,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:42,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:42,507 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:33:51,670 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2019-09-07 09:33:51,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:51,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 09:33:51,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-09-07 09:33:52,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:52,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 70 [2019-09-07 09:33:52,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 09:33:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 09:33:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 09:33:52,538 INFO L87 Difference]: Start difference. First operand 2345 states and 3151 transitions. Second operand 70 states. [2019-09-07 09:35:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:02,827 INFO L93 Difference]: Finished difference Result 4826 states and 6556 transitions. [2019-09-07 09:35:02,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 658 states. [2019-09-07 09:35:02,827 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 183 [2019-09-07 09:35:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:02,834 INFO L225 Difference]: With dead ends: 4826 [2019-09-07 09:35:02,834 INFO L226 Difference]: Without dead ends: 2550 [2019-09-07 09:35:02,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 692 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195464 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=158927, Invalid=322015, Unknown=0, NotChecked=0, Total=480942 [2019-09-07 09:35:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2019-09-07 09:35:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2468. [2019-09-07 09:35:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2468 states. [2019-09-07 09:35:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3316 transitions. [2019-09-07 09:35:02,990 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3316 transitions. Word has length 183 [2019-09-07 09:35:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:02,993 INFO L475 AbstractCegarLoop]: Abstraction has 2468 states and 3316 transitions. [2019-09-07 09:35:02,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 09:35:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3316 transitions. [2019-09-07 09:35:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-09-07 09:35:02,994 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:02,994 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:02,995 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1374040666, now seen corresponding path program 24 times [2019-09-07 09:35:02,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:02,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:02,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:02,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:02,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-09-07 09:35:03,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:03,689 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:03,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:35:21,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2019-09-07 09:35:21,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:21,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 09:35:21,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-09-07 09:35:22,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:22,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35] total 72 [2019-09-07 09:35:22,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-07 09:35:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-07 09:35:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3780, Unknown=0, NotChecked=0, Total=5112 [2019-09-07 09:35:22,604 INFO L87 Difference]: Start difference. First operand 2468 states and 3316 transitions. Second operand 72 states. [2019-09-07 09:36:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:41,588 INFO L93 Difference]: Finished difference Result 5075 states and 6892 transitions. [2019-09-07 09:36:41,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 695 states. [2019-09-07 09:36:41,588 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 188 [2019-09-07 09:36:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:41,593 INFO L225 Difference]: With dead ends: 5075 [2019-09-07 09:36:41,594 INFO L226 Difference]: Without dead ends: 2678 [2019-09-07 09:36:41,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 730 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218625 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=176884, Invalid=358208, Unknown=0, NotChecked=0, Total=535092 [2019-09-07 09:36:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2019-09-07 09:36:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2594. [2019-09-07 09:36:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2019-09-07 09:36:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3485 transitions. [2019-09-07 09:36:41,769 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3485 transitions. Word has length 188 [2019-09-07 09:36:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:41,769 INFO L475 AbstractCegarLoop]: Abstraction has 2594 states and 3485 transitions. [2019-09-07 09:36:41,769 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-07 09:36:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3485 transitions. [2019-09-07 09:36:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-07 09:36:41,770 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:41,771 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 35, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:41,771 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1877308407, now seen corresponding path program 25 times [2019-09-07 09:36:41,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:41,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:41,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:41,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:41,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-09-07 09:36:42,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:42,606 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:36:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:36:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:42,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 09:36:42,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (37)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:36:43,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:43,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36] total 74 [2019-09-07 09:36:43,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-07 09:36:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-07 09:36:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1406, Invalid=3996, Unknown=0, NotChecked=0, Total=5402 [2019-09-07 09:36:43,737 INFO L87 Difference]: Start difference. First operand 2594 states and 3485 transitions. Second operand 74 states.