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/standard_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:41:46,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:41:46,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:41:46,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:41:46,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:41:46,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:41:46,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:41:46,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:41:46,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:41:46,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:41:46,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:41:46,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:41:46,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:41:46,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:41:46,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:41:46,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:41:46,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:41:46,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:41:46,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:41:46,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:41:46,246 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 09:41:46,260 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:41:46,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:41:46,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:41:46,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:41:46,262 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:41:46,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:41:46,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:41:46,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:41:46,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:41:46,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:41:46,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:41:46,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:41:46,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:41:46,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:41:46,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:41:46,264 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:41:46,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:41:46,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:41:46,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:41:46,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:41:46,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:41:46,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:41:46,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:41:46,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:41:46,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:41:46,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:41:46,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:41:46,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:41:46,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:41:46,296 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:41:46,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:41:46,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:41:46,313 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:41:46,314 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:41:46,314 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-09-07 09:41:46,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0df795b9/517266a71bd2448b82485164de750361/FLAG298fb5b81 [2019-09-07 09:41:46,819 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:41:46,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-09-07 09:41:46,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0df795b9/517266a71bd2448b82485164de750361/FLAG298fb5b81 [2019-09-07 09:41:47,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0df795b9/517266a71bd2448b82485164de750361 [2019-09-07 09:41:47,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:41:47,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:41:47,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:41:47,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:41:47,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:41:47,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a2301ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47, skipping insertion in model container [2019-09-07 09:41:47,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,228 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:41:47,243 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:41:47,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:41:47,495 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:41:47,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:41:47,569 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:41:47,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47 WrapperNode [2019-09-07 09:41:47,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:41:47,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:41:47,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:41:47,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:41:47,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (1/1) ... [2019-09-07 09:41:47,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:41:47,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:41:47,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:41:47,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:41:47,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (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 09:41:47,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:41:47,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:41:47,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:41:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:41:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:41:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:41:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:41:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:41:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:41:48,168 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:41:48,169 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-09-07 09:41:48,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:41:48 BoogieIcfgContainer [2019-09-07 09:41:48,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:41:48,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:41:48,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:41:48,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:41:48,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:41:47" (1/3) ... [2019-09-07 09:41:48,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58725b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:41:48, skipping insertion in model container [2019-09-07 09:41:48,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:41:47" (2/3) ... [2019-09-07 09:41:48,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58725b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:41:48, skipping insertion in model container [2019-09-07 09:41:48,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:41:48" (3/3) ... [2019-09-07 09:41:48,188 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2019-09-07 09:41:48,203 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:41:48,211 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:41:48,225 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:41:48,251 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:41:48,252 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:41:48,252 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:41:48,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:41:48,253 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:41:48,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:41:48,253 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:41:48,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:41:48,253 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:41:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-09-07 09:41:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 09:41:48,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:48,279 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, 1, 1] [2019-09-07 09:41:48,281 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2019-09-07 09:41:48,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:48,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:48,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:48,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:48,482 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 09:41:48,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:41:48,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:41:48,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:41:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:41:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:41:48,505 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-09-07 09:41:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:48,529 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-07 09:41:48,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:41:48,531 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2019-09-07 09:41:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:48,539 INFO L225 Difference]: With dead ends: 76 [2019-09-07 09:41:48,540 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 09:41:48,543 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 09:41:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 09:41:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-07 09:41:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 09:41:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-09-07 09:41:48,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-09-07 09:41:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:48,586 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-09-07 09:41:48,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:41:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-09-07 09:41:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 09:41:48,588 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:48,588 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, 1, 1] [2019-09-07 09:41:48,589 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2019-09-07 09:41:48,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:48,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:48,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:48,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:48,652 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 09:41:48,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:41:48,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:41:48,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:41:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:41:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:41:48,662 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 3 states. [2019-09-07 09:41:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:48,690 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-09-07 09:41:48,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:41:48,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-09-07 09:41:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:48,692 INFO L225 Difference]: With dead ends: 68 [2019-09-07 09:41:48,693 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 09:41:48,694 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 09:41:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 09:41:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-07 09:41:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 09:41:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-09-07 09:41:48,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2019-09-07 09:41:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:48,702 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-09-07 09:41:48,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:41:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-09-07 09:41:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:41:48,704 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:48,704 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, 1, 1, 1, 1] [2019-09-07 09:41:48,704 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1148318088, now seen corresponding path program 1 times [2019-09-07 09:41:48,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:48,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:48,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:48,775 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 09:41:48,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:41:48,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:41:48,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:41:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:41:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:41:48,780 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 3 states. [2019-09-07 09:41:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:48,891 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-09-07 09:41:48,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:41:48,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-09-07 09:41:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:48,893 INFO L225 Difference]: With dead ends: 76 [2019-09-07 09:41:48,893 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 09:41:48,894 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 09:41:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 09:41:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2019-09-07 09:41:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:41:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-09-07 09:41:48,902 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2019-09-07 09:41:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:48,902 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-09-07 09:41:48,902 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:41:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-09-07 09:41:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 09:41:48,904 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:48,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:48,904 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2019-09-07 09:41:48,905 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:48,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:48,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:48,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 09:41:49,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:49,029 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:49,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:49,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:41:49,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 09:41:49,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:49,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:41:49,177 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:41:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:41:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:41:49,177 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2019-09-07 09:41:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:49,222 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-09-07 09:41:49,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:41:49,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-09-07 09:41:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:49,224 INFO L225 Difference]: With dead ends: 82 [2019-09-07 09:41:49,224 INFO L226 Difference]: Without dead ends: 47 [2019-09-07 09:41:49,225 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:41:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-07 09:41:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-09-07 09:41:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 09:41:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-09-07 09:41:49,232 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 39 [2019-09-07 09:41:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:49,233 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-09-07 09:41:49,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:41:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-09-07 09:41:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 09:41:49,234 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:49,234 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:49,235 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -652688358, now seen corresponding path program 2 times [2019-09-07 09:41:49,235 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:49,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:49,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:49,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:49,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:41:49,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:49,343 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 09:41:49,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:41:49,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:41:49,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:49,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:41:49,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:41:49,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:49,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:41:49,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:41:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:41:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:41:49,440 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 5 states. [2019-09-07 09:41:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:49,573 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-09-07 09:41:49,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:41:49,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-09-07 09:41:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:49,574 INFO L225 Difference]: With dead ends: 95 [2019-09-07 09:41:49,575 INFO L226 Difference]: Without dead ends: 64 [2019-09-07 09:41:49,575 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:41:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-07 09:41:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-09-07 09:41:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 09:41:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-09-07 09:41:49,584 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 41 [2019-09-07 09:41:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:49,584 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-09-07 09:41:49,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:41:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-09-07 09:41:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 09:41:49,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:49,586 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:49,586 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash -291170034, now seen corresponding path program 3 times [2019-09-07 09:41:49,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:49,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:49,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:49,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:49,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-07 09:41:49,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:49,669 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 09:41:49,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:49,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:41:49,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:49,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:41:49,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-07 09:41:49,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:49,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:41:49,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:41:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:41:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:41:49,794 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2019-09-07 09:41:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:49,955 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-09-07 09:41:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:41:49,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-09-07 09:41:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:49,957 INFO L225 Difference]: With dead ends: 126 [2019-09-07 09:41:49,959 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 09:41:49,960 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:41:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 09:41:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2019-09-07 09:41:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 09:41:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-09-07 09:41:49,983 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 53 [2019-09-07 09:41:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:49,984 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-09-07 09:41:49,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:41:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-09-07 09:41:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:41:49,988 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:49,988 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:49,989 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1009666336, now seen corresponding path program 4 times [2019-09-07 09:41:49,989 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:49,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:49,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:49,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:49,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-09-07 09:41:50,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:50,092 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 09:41:50,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:50,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:41:50,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:50,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:41:50,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-09-07 09:41:50,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:50,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:41:50,191 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:41:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:41:50,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:41:50,192 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 7 states. [2019-09-07 09:41:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:50,240 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2019-09-07 09:41:50,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:41:50,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-09-07 09:41:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:50,241 INFO L225 Difference]: With dead ends: 134 [2019-09-07 09:41:50,242 INFO L226 Difference]: Without dead ends: 75 [2019-09-07 09:41:50,244 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:41:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-07 09:41:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-09-07 09:41:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-07 09:41:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2019-09-07 09:41:50,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 67 [2019-09-07 09:41:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:50,254 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2019-09-07 09:41:50,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:41:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2019-09-07 09:41:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 09:41:50,255 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:50,256 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:50,256 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -588229954, now seen corresponding path program 5 times [2019-09-07 09:41:50,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:50,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:50,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:50,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:50,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-09-07 09:41:50,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:50,370 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:50,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:41:59,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:41:59,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:59,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:41:59,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-09-07 09:41:59,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:59,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:41:59,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:41:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:41:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:41:59,312 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 7 states. [2019-09-07 09:41:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:59,457 INFO L93 Difference]: Finished difference Result 143 states and 161 transitions. [2019-09-07 09:41:59,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:41:59,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2019-09-07 09:41:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:59,459 INFO L225 Difference]: With dead ends: 143 [2019-09-07 09:41:59,459 INFO L226 Difference]: Without dead ends: 92 [2019-09-07 09:41:59,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:41:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-07 09:41:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2019-09-07 09:41:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 09:41:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-09-07 09:41:59,471 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 69 [2019-09-07 09:41:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:59,471 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-09-07 09:41:59,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:41:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-09-07 09:41:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 09:41:59,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:59,474 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:59,474 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:59,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1140158898, now seen corresponding path program 6 times [2019-09-07 09:41:59,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:59,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:59,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:59,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:59,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-09-07 09:41:59,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:59,559 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) [2019-09-07 09:41:59,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:00,210 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:42:00,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:00,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:42:00,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-09-07 09:42:00,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:00,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:42:00,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:42:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:42:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:42:00,279 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2019-09-07 09:42:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:00,475 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2019-09-07 09:42:00,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:42:00,475 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2019-09-07 09:42:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:00,476 INFO L225 Difference]: With dead ends: 178 [2019-09-07 09:42:00,477 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 09:42:00,478 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:42:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 09:42:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2019-09-07 09:42:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 09:42:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2019-09-07 09:42:00,486 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 81 [2019-09-07 09:42:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:00,487 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2019-09-07 09:42:00,487 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:42:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2019-09-07 09:42:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 09:42:00,489 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:00,489 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:00,489 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1458418372, now seen corresponding path program 7 times [2019-09-07 09:42:00,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:00,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:00,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:00,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-09-07 09:42:00,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:00,581 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 09:42:00,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:42:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:00,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:42:00,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-09-07 09:42:00,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:00,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:42:00,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:42:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:42:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:42:00,736 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 9 states. [2019-09-07 09:42:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:00,768 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2019-09-07 09:42:00,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:42:00,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2019-09-07 09:42:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:00,770 INFO L225 Difference]: With dead ends: 186 [2019-09-07 09:42:00,770 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 09:42:00,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:42:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 09:42:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-09-07 09:42:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-07 09:42:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2019-09-07 09:42:00,779 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 95 [2019-09-07 09:42:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:00,779 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2019-09-07 09:42:00,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:42:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2019-09-07 09:42:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:42:00,781 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:00,781 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:00,781 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1862746978, now seen corresponding path program 8 times [2019-09-07 09:42:00,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:00,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:00,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:00,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:42:00,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-09-07 09:42:00,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:00,862 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 09:42:00,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:42:00,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:42:00,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:00,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:42:00,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-09-07 09:42:01,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:01,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:42:01,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:42:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:42:01,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:42:01,037 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 15 states. [2019-09-07 09:42:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:01,231 INFO L93 Difference]: Finished difference Result 206 states and 226 transitions. [2019-09-07 09:42:01,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:42:01,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2019-09-07 09:42:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:01,233 INFO L225 Difference]: With dead ends: 206 [2019-09-07 09:42:01,233 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 09:42:01,234 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:42:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 09:42:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2019-09-07 09:42:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 09:42:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2019-09-07 09:42:01,241 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 97 [2019-09-07 09:42:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:01,241 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2019-09-07 09:42:01,241 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:42:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2019-09-07 09:42:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 09:42:01,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:01,243 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:01,243 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash -73707404, now seen corresponding path program 9 times [2019-09-07 09:42:01,244 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:01,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:01,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:01,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:01,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-09-07 09:42:01,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:01,346 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) [2019-09-07 09:42:01,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:04,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:42:04,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:04,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:42:04,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-09-07 09:42:04,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:04,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-09-07 09:42:04,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:42:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:42:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:42:04,352 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 12 states. [2019-09-07 09:42:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:04,546 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2019-09-07 09:42:04,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:42:04,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2019-09-07 09:42:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:04,550 INFO L225 Difference]: With dead ends: 221 [2019-09-07 09:42:04,551 INFO L226 Difference]: Without dead ends: 140 [2019-09-07 09:42:04,551 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:42:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-07 09:42:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-07 09:42:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 09:42:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 147 transitions. [2019-09-07 09:42:04,559 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 147 transitions. Word has length 111 [2019-09-07 09:42:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:04,560 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 147 transitions. [2019-09-07 09:42:04,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:42:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 147 transitions. [2019-09-07 09:42:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-07 09:42:04,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:04,562 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:04,562 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 516959836, now seen corresponding path program 10 times [2019-09-07 09:42:04,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:04,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:04,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:04,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:04,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-09-07 09:42:04,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:04,684 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 09:42:04,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:04,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:42:04,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:04,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:42:04,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-09-07 09:42:04,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:04,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:42:04,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:42:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:42:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:42:04,801 INFO L87 Difference]: Start difference. First operand 140 states and 147 transitions. Second operand 11 states. [2019-09-07 09:42:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:04,846 INFO L93 Difference]: Finished difference Result 262 states and 276 transitions. [2019-09-07 09:42:04,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:42:04,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2019-09-07 09:42:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:04,849 INFO L225 Difference]: With dead ends: 262 [2019-09-07 09:42:04,849 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 09:42:04,851 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:42:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 09:42:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-09-07 09:42:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 09:42:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2019-09-07 09:42:04,860 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 135 [2019-09-07 09:42:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:04,861 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2019-09-07 09:42:04,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:42:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2019-09-07 09:42:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:42:04,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:04,863 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:04,863 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:04,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1291077882, now seen corresponding path program 11 times [2019-09-07 09:42:04,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:04,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:04,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:04,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:04,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-09-07 09:42:05,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:05,052 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 09:42:05,065 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:43:05,192 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:43:05,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:05,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:43:05,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-09-07 09:43:05,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:05,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-09-07 09:43:05,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:43:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:43:05,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:43:05,380 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 20 states. [2019-09-07 09:43:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:05,708 INFO L93 Difference]: Finished difference Result 282 states and 302 transitions. [2019-09-07 09:43:05,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:43:05,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2019-09-07 09:43:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:05,710 INFO L225 Difference]: With dead ends: 282 [2019-09-07 09:43:05,710 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 09:43:05,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:43:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 09:43:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2019-09-07 09:43:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 09:43:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2019-09-07 09:43:05,716 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 137 [2019-09-07 09:43:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:05,717 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2019-09-07 09:43:05,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:43:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2019-09-07 09:43:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 09:43:05,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:05,719 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:05,719 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1261425652, now seen corresponding path program 12 times [2019-09-07 09:43:05,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:05,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:05,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:05,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:05,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-09-07 09:43:05,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:05,919 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 09:43:05,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:49,198 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:43:49,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:49,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:43:49,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-09-07 09:43:49,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:49,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-09-07 09:43:49,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:43:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:43:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:43:49,509 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 22 states. [2019-09-07 09:43:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:49,902 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2019-09-07 09:43:49,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:43:49,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 151 [2019-09-07 09:43:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:49,904 INFO L225 Difference]: With dead ends: 308 [2019-09-07 09:43:49,904 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 09:43:49,905 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:43:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 09:43:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2019-09-07 09:43:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-07 09:43:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2019-09-07 09:43:49,912 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 151 [2019-09-07 09:43:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:49,912 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2019-09-07 09:43:49,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:43:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2019-09-07 09:43:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-07 09:43:49,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:49,914 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:49,914 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1995126882, now seen corresponding path program 13 times [2019-09-07 09:43:49,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:49,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:49,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:49,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:49,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-09-07 09:43:50,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:50,070 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 09:43:50,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:50,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:43:50,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-09-07 09:43:50,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:50,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:43:50,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:43:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:43:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:43:50,204 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 14 states. [2019-09-07 09:43:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:50,257 INFO L93 Difference]: Finished difference Result 316 states and 330 transitions. [2019-09-07 09:43:50,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:43:50,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 165 [2019-09-07 09:43:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:50,260 INFO L225 Difference]: With dead ends: 316 [2019-09-07 09:43:50,260 INFO L226 Difference]: Without dead ends: 173 [2019-09-07 09:43:50,262 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:43:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-07 09:43:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-09-07 09:43:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-07 09:43:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2019-09-07 09:43:50,270 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 165 [2019-09-07 09:43:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:50,270 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2019-09-07 09:43:50,270 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:43:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2019-09-07 09:43:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-07 09:43:50,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:50,273 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:50,273 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash -331679300, now seen corresponding path program 14 times [2019-09-07 09:43:50,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:50,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:50,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:50,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:50,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2019-09-07 09:43:50,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:50,464 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 09:43:50,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:43:50,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:43:50,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:50,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:43:50,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-09-07 09:43:50,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:50,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:43:50,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:43:50,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:43:50,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:43:50,751 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 25 states. [2019-09-07 09:43:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:51,100 INFO L93 Difference]: Finished difference Result 336 states and 356 transitions. [2019-09-07 09:43:51,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:43:51,101 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 167 [2019-09-07 09:43:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:51,102 INFO L225 Difference]: With dead ends: 336 [2019-09-07 09:43:51,102 INFO L226 Difference]: Without dead ends: 193 [2019-09-07 09:43:51,103 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:43:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-09-07 09:43:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2019-09-07 09:43:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-09-07 09:43:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2019-09-07 09:43:51,110 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 167 [2019-09-07 09:43:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:51,110 INFO L475 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2019-09-07 09:43:51,110 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:43:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2019-09-07 09:43:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-07 09:43:51,112 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:51,112 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:51,113 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1543659854, now seen corresponding path program 15 times [2019-09-07 09:43:51,113 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:51,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:51,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:51,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:51,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2019-09-07 09:43:51,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:51,291 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 09:43:51,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:44:48,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:44:48,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:48,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:44:48,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2019-09-07 09:44:48,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:48,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:44:48,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:44:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:44:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:44:48,482 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 15 states. [2019-09-07 09:44:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:48,753 INFO L93 Difference]: Finished difference Result 335 states and 353 transitions. [2019-09-07 09:44:48,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:44:48,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2019-09-07 09:44:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:48,757 INFO L225 Difference]: With dead ends: 335 [2019-09-07 09:44:48,758 INFO L226 Difference]: Without dead ends: 204 [2019-09-07 09:44:48,758 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:44:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-07 09:44:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2019-09-07 09:44:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-09-07 09:44:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2019-09-07 09:44:48,765 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 181 [2019-09-07 09:44:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:48,766 INFO L475 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2019-09-07 09:44:48,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:44:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2019-09-07 09:44:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-07 09:44:48,768 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:48,768 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:48,768 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash -613636030, now seen corresponding path program 16 times [2019-09-07 09:44:48,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:48,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:48,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:48,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-09-07 09:44:48,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:48,933 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:48,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:44:49,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:44:49,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:49,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:44:49,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-09-07 09:44:49,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:49,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:44:49,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:44:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:44:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:44:49,111 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand 16 states. [2019-09-07 09:44:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:49,156 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2019-09-07 09:44:49,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:44:49,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 193 [2019-09-07 09:44:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:49,162 INFO L225 Difference]: With dead ends: 368 [2019-09-07 09:44:49,162 INFO L226 Difference]: Without dead ends: 201 [2019-09-07 09:44:49,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:44:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-09-07 09:44:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2019-09-07 09:44:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-09-07 09:44:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2019-09-07 09:44:49,173 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 193 [2019-09-07 09:44:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:49,174 INFO L475 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2019-09-07 09:44:49,174 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:44:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2019-09-07 09:44:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-09-07 09:44:49,176 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:49,176 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:49,176 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 462463328, now seen corresponding path program 17 times [2019-09-07 09:44:49,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:49,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:49,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:49,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2019-09-07 09:44:49,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:49,393 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:49,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:46:40,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 09:46:40,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:40,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:46:40,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2019-09-07 09:46:40,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:40,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:46:40,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:46:40,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:46:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:46:40,302 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 16 states. [2019-09-07 09:46:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:40,691 INFO L93 Difference]: Finished difference Result 359 states and 377 transitions. [2019-09-07 09:46:40,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:46:40,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 195 [2019-09-07 09:46:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:40,694 INFO L225 Difference]: With dead ends: 359 [2019-09-07 09:46:40,694 INFO L226 Difference]: Without dead ends: 218 [2019-09-07 09:46:40,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:46:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-09-07 09:46:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2019-09-07 09:46:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-07 09:46:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2019-09-07 09:46:40,706 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 195 [2019-09-07 09:46:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:40,706 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2019-09-07 09:46:40,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:46:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2019-09-07 09:46:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-07 09:46:40,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:40,709 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:40,710 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:40,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 299773268, now seen corresponding path program 18 times [2019-09-07 09:46:40,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:40,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:40,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:40,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:40,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2019-09-07 09:46:41,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:41,020 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) [2019-09-07 09:46:41,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:10,486 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-07 09:48:10,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:10,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:48:10,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2019-09-07 09:48:10,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:10,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-09-07 09:48:10,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:48:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:48:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:48:10,775 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand 30 states. [2019-09-07 09:48:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:11,215 INFO L93 Difference]: Finished difference Result 412 states and 432 transitions. [2019-09-07 09:48:11,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:48:11,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 207 [2019-09-07 09:48:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:11,221 INFO L225 Difference]: With dead ends: 412 [2019-09-07 09:48:11,221 INFO L226 Difference]: Without dead ends: 233 [2019-09-07 09:48:11,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:48:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-09-07 09:48:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2019-09-07 09:48:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 09:48:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2019-09-07 09:48:11,229 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 207 [2019-09-07 09:48:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:11,230 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2019-09-07 09:48:11,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:48:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2019-09-07 09:48:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-07 09:48:11,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:11,231 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:11,232 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1232399078, now seen corresponding path program 19 times [2019-09-07 09:48:11,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:11,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:11,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:11,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:11,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2019-09-07 09:48:11,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:11,517 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 09:48:11,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:11,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:48:11,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2019-09-07 09:48:11,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:11,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 09:48:11,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:48:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:48:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:11,767 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand 18 states. [2019-09-07 09:48:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:11,848 INFO L93 Difference]: Finished difference Result 420 states and 434 transitions. [2019-09-07 09:48:11,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:48:11,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 221 [2019-09-07 09:48:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:11,850 INFO L225 Difference]: With dead ends: 420 [2019-09-07 09:48:11,850 INFO L226 Difference]: Without dead ends: 229 [2019-09-07 09:48:11,851 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-09-07 09:48:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2019-09-07 09:48:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-07 09:48:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2019-09-07 09:48:11,861 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 221 [2019-09-07 09:48:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:11,861 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2019-09-07 09:48:11,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:48:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2019-09-07 09:48:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-07 09:48:11,864 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:11,864 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:11,865 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1404447492, now seen corresponding path program 20 times [2019-09-07 09:48:11,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:11,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:11,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:11,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:11,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2019-09-07 09:48:12,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:12,131 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:12,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:48:12,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:48:12,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:12,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:48:12,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2019-09-07 09:48:12,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:12,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 09:48:12,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:48:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:48:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:48:12,535 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 33 states. [2019-09-07 09:48:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:12,902 INFO L93 Difference]: Finished difference Result 440 states and 460 transitions. [2019-09-07 09:48:12,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:48:12,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 223 [2019-09-07 09:48:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:12,904 INFO L225 Difference]: With dead ends: 440 [2019-09-07 09:48:12,904 INFO L226 Difference]: Without dead ends: 249 [2019-09-07 09:48:12,906 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:48:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-09-07 09:48:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2019-09-07 09:48:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-09-07 09:48:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2019-09-07 09:48:12,913 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 223 [2019-09-07 09:48:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:12,914 INFO L475 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2019-09-07 09:48:12,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:48:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2019-09-07 09:48:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-07 09:48:12,915 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:12,915 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:12,916 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1136937834, now seen corresponding path program 21 times [2019-09-07 09:48:12,916 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:12,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:12,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:12,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:12,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2019-09-07 09:48:13,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:13,172 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 09:48:13,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:49:49,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 09:49:49,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:49,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:49:49,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2019-09-07 09:49:49,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:49,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:49:49,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:49:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:49:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:49:49,601 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 19 states. [2019-09-07 09:49:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:49,962 INFO L93 Difference]: Finished difference Result 431 states and 449 transitions. [2019-09-07 09:49:49,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:49:49,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 237 [2019-09-07 09:49:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:49,965 INFO L225 Difference]: With dead ends: 431 [2019-09-07 09:49:49,966 INFO L226 Difference]: Without dead ends: 260 [2019-09-07 09:49:49,967 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:49:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-07 09:49:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2019-09-07 09:49:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2019-09-07 09:49:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2019-09-07 09:49:49,974 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 237 [2019-09-07 09:49:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:49,975 INFO L475 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2019-09-07 09:49:49,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:49:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2019-09-07 09:49:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-09-07 09:49:49,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:49,977 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:49,977 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1725526134, now seen corresponding path program 22 times [2019-09-07 09:49:49,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:49,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:49,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:49,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:49,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2019-09-07 09:49:50,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:50,331 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 09:49:50,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:49:50,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:49:50,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:49:50,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:49:50,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:49:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Stream Closed [2019-09-07 09:49:50,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:49:50,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:49:50,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:49:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:49:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:49:50,517 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand 20 states. [2019-09-07 09:49:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:49:50,571 INFO L93 Difference]: Finished difference Result 472 states and 486 transitions. [2019-09-07 09:49:50,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:49:50,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 249 [2019-09-07 09:49:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:49:50,572 INFO L225 Difference]: With dead ends: 472 [2019-09-07 09:49:50,573 INFO L226 Difference]: Without dead ends: 257 [2019-09-07 09:49:50,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:49:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-09-07 09:49:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2019-09-07 09:49:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-09-07 09:49:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2019-09-07 09:49:50,580 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 249 [2019-09-07 09:49:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:49:50,581 INFO L475 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2019-09-07 09:49:50,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:49:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2019-09-07 09:49:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-07 09:49:50,582 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:49:50,582 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:49:50,583 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:49:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:49:50,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2019858088, now seen corresponding path program 23 times [2019-09-07 09:49:50,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:49:50,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:49:50,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:50,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:49:50,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:49:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:49:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2019-09-07 09:49:50,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:49:50,895 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 09:49:50,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:52:21,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 09:52:21,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:21,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:52:21,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2019-09-07 09:52:22,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:22,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:52:22,093 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:52:22,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:52:22,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:52:22,094 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 37 states. [2019-09-07 09:52:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:22,520 INFO L93 Difference]: Finished difference Result 492 states and 512 transitions. [2019-09-07 09:52:22,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:52:22,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 251 [2019-09-07 09:52:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:22,526 INFO L225 Difference]: With dead ends: 492 [2019-09-07 09:52:22,526 INFO L226 Difference]: Without dead ends: 277 [2019-09-07 09:52:22,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:52:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-09-07 09:52:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2019-09-07 09:52:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-09-07 09:52:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2019-09-07 09:52:22,535 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 251 [2019-09-07 09:52:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:22,536 INFO L475 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2019-09-07 09:52:22,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:52:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2019-09-07 09:52:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-09-07 09:52:22,537 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:22,538 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:22,538 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1010561338, now seen corresponding path program 24 times [2019-09-07 09:52:22,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:22,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:22,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2058 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1769 trivial. 0 not checked. [2019-09-07 09:52:22,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:22,929 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) [2019-09-07 09:52:22,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:41,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 09:54:41,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:41,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:54:41,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2058 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2019-09-07 09:54:42,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:42,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 09:54:42,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 09:54:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 09:54:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:54:42,240 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 39 states. [2019-09-07 09:54:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:42,738 INFO L93 Difference]: Finished difference Result 518 states and 538 transitions. [2019-09-07 09:54:42,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 09:54:42,739 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 265 [2019-09-07 09:54:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:42,740 INFO L225 Difference]: With dead ends: 518 [2019-09-07 09:54:42,740 INFO L226 Difference]: Without dead ends: 291 [2019-09-07 09:54:42,742 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:54:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-09-07 09:54:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 284. [2019-09-07 09:54:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2019-09-07 09:54:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2019-09-07 09:54:42,751 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 265 [2019-09-07 09:54:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:42,751 INFO L475 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2019-09-07 09:54:42,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 09:54:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2019-09-07 09:54:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-09-07 09:54:42,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:42,753 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:42,753 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1305797708, now seen corresponding path program 25 times [2019-09-07 09:54:42,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:42,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:42,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:42,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:42,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2019-09-07 09:54:43,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:43,117 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:43,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:43,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:54:43,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2019-09-07 09:54:43,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:43,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2019-09-07 09:54:43,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 09:54:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 09:54:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:54:43,726 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 41 states. [2019-09-07 09:54:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:44,260 INFO L93 Difference]: Finished difference Result 544 states and 564 transitions. [2019-09-07 09:54:44,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 09:54:44,261 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 279 [2019-09-07 09:54:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:44,263 INFO L225 Difference]: With dead ends: 544 [2019-09-07 09:54:44,263 INFO L226 Difference]: Without dead ends: 305 [2019-09-07 09:54:44,264 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:54:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-09-07 09:54:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2019-09-07 09:54:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2019-09-07 09:54:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2019-09-07 09:54:44,274 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 279 [2019-09-07 09:54:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:44,274 INFO L475 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2019-09-07 09:54:44,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 09:54:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2019-09-07 09:54:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-09-07 09:54:44,276 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:44,276 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:44,276 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1464504286, now seen corresponding path program 26 times [2019-09-07 09:54:44,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:44,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:44,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:44,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:44,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2566 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-09-07 09:54:44,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:44,591 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:44,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:54:44,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:54:44,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:44,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:54:44,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2566 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2019-09-07 09:54:45,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:45,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2019-09-07 09:54:45,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 09:54:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 09:54:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:54:45,297 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand 43 states. [2019-09-07 09:54:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:45,887 INFO L93 Difference]: Finished difference Result 570 states and 590 transitions. [2019-09-07 09:54:45,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 09:54:45,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 293 [2019-09-07 09:54:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:45,890 INFO L225 Difference]: With dead ends: 570 [2019-09-07 09:54:45,890 INFO L226 Difference]: Without dead ends: 319 [2019-09-07 09:54:45,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:54:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-09-07 09:54:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2019-09-07 09:54:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2019-09-07 09:54:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2019-09-07 09:54:45,904 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 293 [2019-09-07 09:54:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:45,905 INFO L475 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2019-09-07 09:54:45,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 09:54:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2019-09-07 09:54:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-09-07 09:54:45,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:45,908 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:45,909 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1195371536, now seen corresponding path program 27 times [2019-09-07 09:54:45,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:45,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:45,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:45,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:45,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2841 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2441 trivial. 0 not checked. [2019-09-07 09:54:46,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:46,463 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 09:54:46,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2