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-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:54:39,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:54:39,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:54:39,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 10:54:39,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:54:39,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:54:39,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:54:39,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:54:39,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:54:39,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:54:39,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:54:39,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:54:39,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:54:39,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:54:39,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:54:39,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:54:39,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:54:39,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:54:39,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:54:39,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:54:39,202 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 10:54:39,216 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:54:39,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:54:39,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:54:39,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:54:39,218 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:54:39,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:54:39,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:54:39,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:54:39,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:54:39,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:54:39,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:54:39,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:54:39,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:54:39,220 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:54:39,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:54:39,220 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:54:39,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:54:39,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:54:39,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:54:39,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:54:39,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:54:39,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:54:39,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:54:39,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:54:39,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:54:39,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:54:39,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:54:39,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:54:39,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:54:39,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:54:39,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:54:39,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:54:39,290 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:54:39,290 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:54:39,291 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2019-09-07 10:54:39,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73d1a7c51/2209ddc7c5ba4748ad123bc80eaeea80/FLAG7eea0305c [2019-09-07 10:54:39,803 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:54:39,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2019-09-07 10:54:39,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73d1a7c51/2209ddc7c5ba4748ad123bc80eaeea80/FLAG7eea0305c [2019-09-07 10:54:40,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73d1a7c51/2209ddc7c5ba4748ad123bc80eaeea80 [2019-09-07 10:54:40,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:54:40,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:54:40,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:54:40,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:54:40,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:54:40,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692b7d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40, skipping insertion in model container [2019-09-07 10:54:40,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,239 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:54:40,262 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:54:40,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:54:40,457 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:54:40,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:54:40,586 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:54:40,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40 WrapperNode [2019-09-07 10:54:40,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:54:40,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:54:40,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:54:40,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:54:40,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (1/1) ... [2019-09-07 10:54:40,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:54:40,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:54:40,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:54:40,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:54:40,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (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 10:54:40,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:54:40,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:54:40,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:54:40,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:54:40,684 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-07 10:54:40,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:54:40,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:54:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-07 10:54:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-07 10:54:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:54:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:54:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:54:40,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:54:41,002 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:54:41,002 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-07 10:54:41,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:54:41 BoogieIcfgContainer [2019-09-07 10:54:41,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:54:41,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:54:41,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:54:41,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:54:41,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:54:40" (1/3) ... [2019-09-07 10:54:41,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30135565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:54:41, skipping insertion in model container [2019-09-07 10:54:41,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:54:40" (2/3) ... [2019-09-07 10:54:41,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30135565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:54:41, skipping insertion in model container [2019-09-07 10:54:41,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:54:41" (3/3) ... [2019-09-07 10:54:41,011 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2019-09-07 10:54:41,021 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:54:41,029 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:54:41,046 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:54:41,080 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:54:41,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:54:41,081 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:54:41,081 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:54:41,081 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:54:41,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:54:41,081 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:54:41,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:54:41,081 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:54:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-09-07 10:54:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 10:54:41,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:41,107 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:41,109 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:41,114 INFO L82 PathProgramCache]: Analyzing trace with hash 554320188, now seen corresponding path program 1 times [2019-09-07 10:54:41,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:41,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:41,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:41,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:41,290 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 10:54:41,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:54:41,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:54:41,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:54:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:54:41,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:54:41,314 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-09-07 10:54:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:41,395 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2019-09-07 10:54:41,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:54:41,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-07 10:54:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:41,410 INFO L225 Difference]: With dead ends: 60 [2019-09-07 10:54:41,411 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 10:54:41,418 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 10:54:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 10:54:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-09-07 10:54:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 10:54:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-09-07 10:54:41,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2019-09-07 10:54:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:41,461 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-09-07 10:54:41,461 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:54:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-09-07 10:54:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 10:54:41,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:41,463 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:41,463 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2023958242, now seen corresponding path program 1 times [2019-09-07 10:54:41,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:41,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:41,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:41,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:41,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:54:41,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:54:41,571 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:54:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:54:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:54:41,572 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 3 states. [2019-09-07 10:54:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:41,626 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-09-07 10:54:41,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:54:41,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-09-07 10:54:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:41,628 INFO L225 Difference]: With dead ends: 57 [2019-09-07 10:54:41,628 INFO L226 Difference]: Without dead ends: 38 [2019-09-07 10:54:41,630 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 10:54:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-07 10:54:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2019-09-07 10:54:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 10:54:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-09-07 10:54:41,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2019-09-07 10:54:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:41,637 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-09-07 10:54:41,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:54:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-09-07 10:54:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 10:54:41,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:41,639 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:41,639 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152228, now seen corresponding path program 1 times [2019-09-07 10:54:41,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:41,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:41,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:41,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:41,730 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 10:54:41,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:41,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:54:41,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:41,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:41,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:54:41,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:54:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:54:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:54:41,843 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2019-09-07 10:54:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:41,909 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2019-09-07 10:54:41,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:54:41,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-07 10:54:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:41,911 INFO L225 Difference]: With dead ends: 65 [2019-09-07 10:54:41,911 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 10:54:41,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 10:54:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 10:54:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2019-09-07 10:54:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 10:54:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-09-07 10:54:41,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 20 [2019-09-07 10:54:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:41,920 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-09-07 10:54:41,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:54:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-09-07 10:54:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 10:54:41,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:41,922 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:41,922 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1732225596, now seen corresponding path program 2 times [2019-09-07 10:54:41,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:41,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:41,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:41,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:41,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:41,999 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) [2019-09-07 10:54:42,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:42,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:54:42,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:42,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:54:42,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:42,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:54:42,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:54:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:54:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:54:42,093 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2019-09-07 10:54:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:42,177 INFO L93 Difference]: Finished difference Result 78 states and 105 transitions. [2019-09-07 10:54:42,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:54:42,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-09-07 10:54:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:42,179 INFO L225 Difference]: With dead ends: 78 [2019-09-07 10:54:42,179 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 10:54:42,180 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:54:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 10:54:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2019-09-07 10:54:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-07 10:54:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2019-09-07 10:54:42,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 25 [2019-09-07 10:54:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:42,188 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2019-09-07 10:54:42,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:54:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2019-09-07 10:54:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-07 10:54:42,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:42,190 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:42,190 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash -714249500, now seen corresponding path program 3 times [2019-09-07 10:54:42,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:42,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:42,282 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 10:54:42,300 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 10:54:42,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 10:54:42,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:42,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:54:42,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:42,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:54:42,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:54:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:54:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:54:42,373 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2019-09-07 10:54:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:42,450 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2019-09-07 10:54:42,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:54:42,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-09-07 10:54:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:42,452 INFO L225 Difference]: With dead ends: 91 [2019-09-07 10:54:42,453 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 10:54:42,453 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 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 10:54:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 10:54:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-09-07 10:54:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 10:54:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-09-07 10:54:42,461 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 30 [2019-09-07 10:54:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:42,462 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-09-07 10:54:42,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:54:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-09-07 10:54:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 10:54:42,463 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:42,463 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:42,464 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -58338500, now seen corresponding path program 4 times [2019-09-07 10:54:42,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:42,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:42,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:42,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:42,554 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 10:54:42,571 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 10:54:42,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:54:42,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:42,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:54:42,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:42,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:54:42,650 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:54:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:54:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:54:42,650 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 8 states. [2019-09-07 10:54:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:42,745 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2019-09-07 10:54:42,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:54:42,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-09-07 10:54:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:42,747 INFO L225 Difference]: With dead ends: 104 [2019-09-07 10:54:42,747 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 10:54:42,748 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:54:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 10:54:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 55. [2019-09-07 10:54:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 10:54:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2019-09-07 10:54:42,756 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 35 [2019-09-07 10:54:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:42,756 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2019-09-07 10:54:42,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:54:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2019-09-07 10:54:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 10:54:42,758 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:42,758 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:42,758 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:42,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1835474460, now seen corresponding path program 5 times [2019-09-07 10:54:42,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:42,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:42,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:42,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:42,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:42,873 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 10:54:42,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:54:42,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 10:54:42,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:42,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:54:42,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:43,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:43,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:54:43,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:54:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:54:43,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:54:43,013 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 9 states. [2019-09-07 10:54:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:43,112 INFO L93 Difference]: Finished difference Result 117 states and 162 transitions. [2019-09-07 10:54:43,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:54:43,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2019-09-07 10:54:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:43,114 INFO L225 Difference]: With dead ends: 117 [2019-09-07 10:54:43,114 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 10:54:43,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 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 10:54:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 10:54:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 62. [2019-09-07 10:54:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 10:54:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2019-09-07 10:54:43,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 40 [2019-09-07 10:54:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:43,124 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2019-09-07 10:54:43,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:54:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2019-09-07 10:54:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 10:54:43,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:43,125 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:43,126 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash -756237252, now seen corresponding path program 6 times [2019-09-07 10:54:43,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:43,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:43,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:43,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:43,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:43,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:43,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:54:43,381 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:54:43,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:43,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:54:43,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:43,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:43,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:54:43,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:54:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:54:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:54:43,416 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 10 states. [2019-09-07 10:54:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:43,530 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2019-09-07 10:54:43,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:54:43,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-09-07 10:54:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:43,533 INFO L225 Difference]: With dead ends: 130 [2019-09-07 10:54:43,533 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 10:54:43,534 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:54:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 10:54:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2019-09-07 10:54:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-07 10:54:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2019-09-07 10:54:43,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 45 [2019-09-07 10:54:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:43,551 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2019-09-07 10:54:43,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:54:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2019-09-07 10:54:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-07 10:54:43,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:43,556 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:43,556 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1696307428, now seen corresponding path program 7 times [2019-09-07 10:54:43,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:43,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:43,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:43,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:43,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:43,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:54:43,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:43,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:54:43,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:54:43,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:43,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:54:43,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:54:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:54:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:54:43,764 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2019-09-07 10:54:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:43,880 INFO L93 Difference]: Finished difference Result 143 states and 200 transitions. [2019-09-07 10:54:43,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:54:43,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-09-07 10:54:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:43,882 INFO L225 Difference]: With dead ends: 143 [2019-09-07 10:54:43,884 INFO L226 Difference]: Without dead ends: 130 [2019-09-07 10:54:43,885 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 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 10:54:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-07 10:54:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2019-09-07 10:54:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 10:54:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2019-09-07 10:54:43,897 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 50 [2019-09-07 10:54:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:43,900 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2019-09-07 10:54:43,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:54:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2019-09-07 10:54:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-07 10:54:43,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:43,904 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:43,904 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589252, now seen corresponding path program 8 times [2019-09-07 10:54:43,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:43,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:43,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:43,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:44,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:44,050 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) [2019-09-07 10:54:44,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:44,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:54:44,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:44,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:54:44,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:44,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:44,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:54:44,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:54:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:54:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:54:44,148 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 12 states. [2019-09-07 10:54:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:44,274 INFO L93 Difference]: Finished difference Result 156 states and 219 transitions. [2019-09-07 10:54:44,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:54:44,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-09-07 10:54:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:44,276 INFO L225 Difference]: With dead ends: 156 [2019-09-07 10:54:44,276 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 10:54:44,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 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 10:54:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 10:54:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 83. [2019-09-07 10:54:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 10:54:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2019-09-07 10:54:44,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 55 [2019-09-07 10:54:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:44,293 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2019-09-07 10:54:44,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:54:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2019-09-07 10:54:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 10:54:44,295 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:44,295 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:44,295 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash -119173148, now seen corresponding path program 9 times [2019-09-07 10:54:44,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:44,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:44,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:44,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:44,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:44,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:44,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:44,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:54:45,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 10:54:45,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:45,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 10:54:45,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:45,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:45,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 10:54:45,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:54:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:54:45,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:54:45,406 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand 13 states. [2019-09-07 10:54:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:45,539 INFO L93 Difference]: Finished difference Result 169 states and 238 transitions. [2019-09-07 10:54:45,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:54:45,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-09-07 10:54:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:45,545 INFO L225 Difference]: With dead ends: 169 [2019-09-07 10:54:45,545 INFO L226 Difference]: Without dead ends: 156 [2019-09-07 10:54:45,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:54:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-07 10:54:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 90. [2019-09-07 10:54:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-07 10:54:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2019-09-07 10:54:45,555 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 60 [2019-09-07 10:54:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:45,555 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2019-09-07 10:54:45,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:54:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2019-09-07 10:54:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 10:54:45,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:45,558 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:45,558 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1734135356, now seen corresponding path program 10 times [2019-09-07 10:54:45,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:45,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:45,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:45,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:45,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:45,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:45,717 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:45,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:54:46,248 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:54:46,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:46,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:54:46,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:46,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:46,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:54:46,292 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:54:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:54:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:54:46,293 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand 14 states. [2019-09-07 10:54:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:46,435 INFO L93 Difference]: Finished difference Result 182 states and 257 transitions. [2019-09-07 10:54:46,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:54:46,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-09-07 10:54:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:46,437 INFO L225 Difference]: With dead ends: 182 [2019-09-07 10:54:46,437 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 10:54:46,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 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 10:54:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 10:54:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2019-09-07 10:54:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 10:54:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2019-09-07 10:54:46,451 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 65 [2019-09-07 10:54:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:46,452 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2019-09-07 10:54:46,452 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:54:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2019-09-07 10:54:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-07 10:54:46,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:46,453 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:46,453 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash -840513820, now seen corresponding path program 11 times [2019-09-07 10:54:46,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:46,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:46,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:46,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:46,625 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) [2019-09-07 10:54:46,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:47,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 10:54:47,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:47,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:54:47,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:47,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:47,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:54:47,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:54:47,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:54:47,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:54:47,669 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 15 states. [2019-09-07 10:54:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:47,816 INFO L93 Difference]: Finished difference Result 195 states and 276 transitions. [2019-09-07 10:54:47,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:54:47,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2019-09-07 10:54:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:47,818 INFO L225 Difference]: With dead ends: 195 [2019-09-07 10:54:47,818 INFO L226 Difference]: Without dead ends: 182 [2019-09-07 10:54:47,819 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 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 10:54:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-09-07 10:54:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 104. [2019-09-07 10:54:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 10:54:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2019-09-07 10:54:47,830 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 70 [2019-09-07 10:54:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:47,830 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2019-09-07 10:54:47,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:54:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2019-09-07 10:54:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 10:54:47,831 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:47,832 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:47,833 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1703278396, now seen corresponding path program 12 times [2019-09-07 10:54:47,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:47,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:47,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:47,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:47,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:47,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:47,990 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:48,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:54:51,560 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:54:51,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:51,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:54:51,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:54:51,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:51,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:54:51,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:54:51,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:54:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:54:51,633 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand 16 states. [2019-09-07 10:54:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:51,791 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2019-09-07 10:54:51,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:54:51,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2019-09-07 10:54:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:51,794 INFO L225 Difference]: With dead ends: 208 [2019-09-07 10:54:51,794 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 10:54:51,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 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 10:54:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 10:54:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 111. [2019-09-07 10:54:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-07 10:54:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2019-09-07 10:54:51,800 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 75 [2019-09-07 10:54:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:51,800 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2019-09-07 10:54:51,800 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:54:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2019-09-07 10:54:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 10:54:51,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:51,801 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:51,801 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash 940522980, now seen corresponding path program 13 times [2019-09-07 10:54:51,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:51,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:51,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:51,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:51,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:51,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:51,993 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 10:54:52,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:52,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:54:52,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:54:52,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:52,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:54:52,093 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:54:52,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:54:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:54:52,094 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 17 states. [2019-09-07 10:54:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:52,281 INFO L93 Difference]: Finished difference Result 221 states and 314 transitions. [2019-09-07 10:54:52,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:54:52,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2019-09-07 10:54:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:52,284 INFO L225 Difference]: With dead ends: 221 [2019-09-07 10:54:52,284 INFO L226 Difference]: Without dead ends: 208 [2019-09-07 10:54:52,285 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:54:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-09-07 10:54:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2019-09-07 10:54:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 10:54:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2019-09-07 10:54:52,291 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 80 [2019-09-07 10:54:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:52,291 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2019-09-07 10:54:52,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:54:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2019-09-07 10:54:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-07 10:54:52,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:52,292 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:52,292 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:52,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:52,293 INFO L82 PathProgramCache]: Analyzing trace with hash 621797436, now seen corresponding path program 14 times [2019-09-07 10:54:52,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:52,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:52,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:52,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:54:52,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:52,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:52,464 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) [2019-09-07 10:54:52,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:52,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:54:52,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:52,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:54:52,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:52,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:52,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:54:52,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:54:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:54:52,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:54:52,601 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 18 states. [2019-09-07 10:54:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:52,850 INFO L93 Difference]: Finished difference Result 234 states and 333 transitions. [2019-09-07 10:54:52,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:54:52,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-09-07 10:54:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:52,853 INFO L225 Difference]: With dead ends: 234 [2019-09-07 10:54:52,854 INFO L226 Difference]: Without dead ends: 221 [2019-09-07 10:54:52,855 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 10:54:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-09-07 10:54:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 125. [2019-09-07 10:54:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 10:54:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2019-09-07 10:54:52,864 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 85 [2019-09-07 10:54:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:52,864 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2019-09-07 10:54:52,864 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:54:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2019-09-07 10:54:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-07 10:54:52,865 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:52,866 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:52,866 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1599010020, now seen corresponding path program 15 times [2019-09-07 10:54:52,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:52,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:52,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:52,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:53,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:53,122 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 10:54:53,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:55:05,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 10:55:05,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:55:05,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:55:05,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:55:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:55:05,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:55:05,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 10:55:05,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:55:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:55:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:55:05,406 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand 19 states. [2019-09-07 10:55:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:55:05,640 INFO L93 Difference]: Finished difference Result 247 states and 352 transitions. [2019-09-07 10:55:05,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:55:05,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2019-09-07 10:55:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:55:05,642 INFO L225 Difference]: With dead ends: 247 [2019-09-07 10:55:05,643 INFO L226 Difference]: Without dead ends: 234 [2019-09-07 10:55:05,645 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 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 10:55:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-09-07 10:55:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 132. [2019-09-07 10:55:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 10:55:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2019-09-07 10:55:05,653 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 90 [2019-09-07 10:55:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:55:05,653 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2019-09-07 10:55:05,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:55:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2019-09-07 10:55:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 10:55:05,654 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:55:05,654 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:55:05,655 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:55:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:55:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash -200636100, now seen corresponding path program 16 times [2019-09-07 10:55:05,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:55:05,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:55:05,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:05,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:55:05,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:55:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:55:05,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:55:05,863 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 10:55:05,875 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:55:10,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:55:10,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:55:10,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:55:10,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:55:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (17)] Exception during sending of exit command (exit): Stream closed [2019-09-07 10:55:10,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:55:10,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:55:10,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:55:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:55:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:55:10,747 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand 20 states. [2019-09-07 10:55:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:55:11,016 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2019-09-07 10:55:11,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:55:11,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2019-09-07 10:55:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:55:11,019 INFO L225 Difference]: With dead ends: 260 [2019-09-07 10:55:11,019 INFO L226 Difference]: Without dead ends: 247 [2019-09-07 10:55:11,020 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:55:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-09-07 10:55:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2019-09-07 10:55:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 10:55:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2019-09-07 10:55:11,027 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 95 [2019-09-07 10:55:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:55:11,027 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2019-09-07 10:55:11,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:55:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2019-09-07 10:55:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-07 10:55:11,031 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:55:11,031 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:55:11,032 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:55:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:55:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1066789860, now seen corresponding path program 17 times [2019-09-07 10:55:11,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:55:11,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:55:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:11,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:55:11,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:55:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:55:11,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:55:11,298 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 10:55:11,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:55:16,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 10:55:16,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:55:16,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:55:16,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:55:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (18)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:55:16,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:55:16,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:55:16,683 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:55:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:55:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:55:16,684 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 21 states. [2019-09-07 10:55:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:55:16,916 INFO L93 Difference]: Finished difference Result 273 states and 390 transitions. [2019-09-07 10:55:16,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:55:16,917 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2019-09-07 10:55:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:55:16,918 INFO L225 Difference]: With dead ends: 273 [2019-09-07 10:55:16,919 INFO L226 Difference]: Without dead ends: 260 [2019-09-07 10:55:16,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:55:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-07 10:55:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 146. [2019-09-07 10:55:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 10:55:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2019-09-07 10:55:16,925 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 100 [2019-09-07 10:55:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:55:16,926 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2019-09-07 10:55:16,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:55:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2019-09-07 10:55:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-07 10:55:16,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:55:16,927 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:55:16,927 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:55:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:55:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash -863636932, now seen corresponding path program 18 times [2019-09-07 10:55:16,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:55:16,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:55:16,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:16,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:55:16,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:55:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:55:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:55:17,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:55:17,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:55:17,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:56:39,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 10:56:39,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:39,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:56:39,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:39,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:39,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 10:56:39,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:56:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:56:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:56:39,444 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 22 states. [2019-09-07 10:56:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:39,734 INFO L93 Difference]: Finished difference Result 286 states and 409 transitions. [2019-09-07 10:56:39,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:56:39,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-09-07 10:56:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:39,742 INFO L225 Difference]: With dead ends: 286 [2019-09-07 10:56:39,743 INFO L226 Difference]: Without dead ends: 273 [2019-09-07 10:56:39,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:56:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-09-07 10:56:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 153. [2019-09-07 10:56:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-07 10:56:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 213 transitions. [2019-09-07 10:56:39,750 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 213 transitions. Word has length 105 [2019-09-07 10:56:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:39,750 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 213 transitions. [2019-09-07 10:56:39,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:56:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 213 transitions. [2019-09-07 10:56:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-07 10:56:39,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:39,752 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:39,752 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1462492444, now seen corresponding path program 19 times [2019-09-07 10:56:39,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:39,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:39,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:39,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:39,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:39,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:39,989 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 10:56:40,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:56:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:40,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:56:40,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:40,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:40,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:56:40,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:56:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:56:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:56:40,096 INFO L87 Difference]: Start difference. First operand 153 states and 213 transitions. Second operand 23 states. [2019-09-07 10:56:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:40,375 INFO L93 Difference]: Finished difference Result 299 states and 428 transitions. [2019-09-07 10:56:40,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:56:40,376 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2019-09-07 10:56:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:40,378 INFO L225 Difference]: With dead ends: 299 [2019-09-07 10:56:40,378 INFO L226 Difference]: Without dead ends: 286 [2019-09-07 10:56:40,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:56:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-09-07 10:56:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 160. [2019-09-07 10:56:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-09-07 10:56:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2019-09-07 10:56:40,385 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 110 [2019-09-07 10:56:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:40,385 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2019-09-07 10:56:40,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:56:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2019-09-07 10:56:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-07 10:56:40,386 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:40,387 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:40,387 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1418861372, now seen corresponding path program 20 times [2019-09-07 10:56:40,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:40,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:40,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:40,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:56:40,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:40,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:40,682 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 10:56:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:56:40,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:56:40,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:40,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:56:40,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:56:40,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:40,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:56:40,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:56:40,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:56:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:56:40,798 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand 24 states. [2019-09-07 10:56:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:41,068 INFO L93 Difference]: Finished difference Result 312 states and 447 transitions. [2019-09-07 10:56:41,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:56:41,068 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2019-09-07 10:56:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:41,071 INFO L225 Difference]: With dead ends: 312 [2019-09-07 10:56:41,071 INFO L226 Difference]: Without dead ends: 299 [2019-09-07 10:56:41,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:56:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-09-07 10:56:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 167. [2019-09-07 10:56:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-07 10:56:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 233 transitions. [2019-09-07 10:56:41,078 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 233 transitions. Word has length 115 [2019-09-07 10:56:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:41,078 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 233 transitions. [2019-09-07 10:56:41,078 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:56:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 233 transitions. [2019-09-07 10:56:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 10:56:41,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:41,080 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:41,080 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1056545252, now seen corresponding path program 21 times [2019-09-07 10:56:41,081 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:41,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:41,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:41,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:41,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:41,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:41,453 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) [2019-09-07 10:56:41,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:05,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 10:58:05,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:05,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 10:58:05,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:05,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:05,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:58:05,921 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:58:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:58:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:58:05,924 INFO L87 Difference]: Start difference. First operand 167 states and 233 transitions. Second operand 25 states. [2019-09-07 10:58:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:06,259 INFO L93 Difference]: Finished difference Result 325 states and 466 transitions. [2019-09-07 10:58:06,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:58:06,260 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 120 [2019-09-07 10:58:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:06,262 INFO L225 Difference]: With dead ends: 325 [2019-09-07 10:58:06,262 INFO L226 Difference]: Without dead ends: 312 [2019-09-07 10:58:06,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:58:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-09-07 10:58:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 174. [2019-09-07 10:58:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-07 10:58:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 243 transitions. [2019-09-07 10:58:06,269 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 243 transitions. Word has length 120 [2019-09-07 10:58:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:06,270 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 243 transitions. [2019-09-07 10:58:06,270 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:58:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 243 transitions. [2019-09-07 10:58:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-07 10:58:06,271 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:06,272 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:06,272 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash -566295492, now seen corresponding path program 22 times [2019-09-07 10:58:06,272 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:06,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:06,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:06,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:06,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:06,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:06,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:58:06,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:18,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:58:18,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:18,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:58:18,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:58:18,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:18,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:58:18,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:58:18,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:58:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:58:18,805 INFO L87 Difference]: Start difference. First operand 174 states and 243 transitions. Second operand 26 states. [2019-09-07 10:58:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:19,108 INFO L93 Difference]: Finished difference Result 338 states and 485 transitions. [2019-09-07 10:58:19,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:58:19,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2019-09-07 10:58:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:19,111 INFO L225 Difference]: With dead ends: 338 [2019-09-07 10:58:19,111 INFO L226 Difference]: Without dead ends: 325 [2019-09-07 10:58:19,112 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:58:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-09-07 10:58:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 181. [2019-09-07 10:58:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 10:58:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2019-09-07 10:58:19,119 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 125 [2019-09-07 10:58:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:19,119 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2019-09-07 10:58:19,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:58:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2019-09-07 10:58:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 10:58:19,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:19,122 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:19,122 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2046185700, now seen corresponding path program 23 times [2019-09-07 10:58:19,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:19,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:19,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:19,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:19,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:19,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:19,527 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 10:58:19,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:00:01,432 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-07 11:00:01,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:00:01,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:00:01,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:00:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:00:01,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:00:01,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 11:00:01,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:00:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:00:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:00:01,519 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand 27 states. [2019-09-07 11:00:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:00:02,064 INFO L93 Difference]: Finished difference Result 351 states and 504 transitions. [2019-09-07 11:00:02,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:00:02,065 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-09-07 11:00:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:00:02,067 INFO L225 Difference]: With dead ends: 351 [2019-09-07 11:00:02,067 INFO L226 Difference]: Without dead ends: 338 [2019-09-07 11:00:02,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:00:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-07 11:00:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 188. [2019-09-07 11:00:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-07 11:00:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 263 transitions. [2019-09-07 11:00:02,074 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 263 transitions. Word has length 130 [2019-09-07 11:00:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:00:02,075 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 263 transitions. [2019-09-07 11:00:02,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:00:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 263 transitions. [2019-09-07 11:00:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-07 11:00:02,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:00:02,077 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:00:02,077 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:00:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:00:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1738321212, now seen corresponding path program 24 times [2019-09-07 11:00:02,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:00:02,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:00:02,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:00:02,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:00:02,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:00:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:00:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:00:02,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:00:02,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:00:02,510 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:02:27,886 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-07 11:02:27,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:02:27,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 11:02:27,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:02:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:27,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:02:27,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 11:02:27,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:02:27,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:02:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:02:27,990 INFO L87 Difference]: Start difference. First operand 188 states and 263 transitions. Second operand 28 states. [2019-09-07 11:02:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:02:28,358 INFO L93 Difference]: Finished difference Result 364 states and 523 transitions. [2019-09-07 11:02:28,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 11:02:28,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 135 [2019-09-07 11:02:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:02:28,363 INFO L225 Difference]: With dead ends: 364 [2019-09-07 11:02:28,363 INFO L226 Difference]: Without dead ends: 351 [2019-09-07 11:02:28,365 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:02:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-09-07 11:02:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 195. [2019-09-07 11:02:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-09-07 11:02:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 273 transitions. [2019-09-07 11:02:28,375 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 273 transitions. Word has length 135 [2019-09-07 11:02:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:02:28,376 INFO L475 AbstractCegarLoop]: Abstraction has 195 states and 273 transitions. [2019-09-07 11:02:28,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:02:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 273 transitions. [2019-09-07 11:02:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-07 11:02:28,378 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:02:28,378 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:02:28,378 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:02:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:02:28,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1514518556, now seen corresponding path program 25 times [2019-09-07 11:02:28,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:02:28,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:02:28,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:28,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:02:28,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:28,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:02:28,816 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 11:02:28,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:02:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:28,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 11:02:28,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:02:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:28,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:02:28,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 11:02:29,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 11:02:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 11:02:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 11:02:29,015 INFO L87 Difference]: Start difference. First operand 195 states and 273 transitions. Second operand 29 states. [2019-09-07 11:02:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:02:29,431 INFO L93 Difference]: Finished difference Result 377 states and 542 transitions. [2019-09-07 11:02:29,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:02:29,431 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 140 [2019-09-07 11:02:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:02:29,433 INFO L225 Difference]: With dead ends: 377 [2019-09-07 11:02:29,433 INFO L226 Difference]: Without dead ends: 364 [2019-09-07 11:02:29,434 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 11:02:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-09-07 11:02:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 202. [2019-09-07 11:02:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-09-07 11:02:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 283 transitions. [2019-09-07 11:02:29,439 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 283 transitions. Word has length 140 [2019-09-07 11:02:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:02:29,440 INFO L475 AbstractCegarLoop]: Abstraction has 202 states and 283 transitions. [2019-09-07 11:02:29,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 11:02:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 283 transitions. [2019-09-07 11:02:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-07 11:02:29,441 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:02:29,442 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:02:29,442 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:02:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:02:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1699015108, now seen corresponding path program 26 times [2019-09-07 11:02:29,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:02:29,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:02:29,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:29,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:02:29,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:29,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:02:29,819 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 11:02:29,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:02:29,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:02:29,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:02:29,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 11:02:29,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:02:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:29,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:02:29,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 11:02:29,954 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 11:02:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 11:02:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:02:29,955 INFO L87 Difference]: Start difference. First operand 202 states and 283 transitions. Second operand 30 states. [2019-09-07 11:02:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:02:30,481 INFO L93 Difference]: Finished difference Result 390 states and 561 transitions. [2019-09-07 11:02:30,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 11:02:30,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 145 [2019-09-07 11:02:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:02:30,484 INFO L225 Difference]: With dead ends: 390 [2019-09-07 11:02:30,484 INFO L226 Difference]: Without dead ends: 377 [2019-09-07 11:02:30,486 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:02:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-09-07 11:02:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 209. [2019-09-07 11:02:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-09-07 11:02:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 293 transitions. [2019-09-07 11:02:30,492 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 293 transitions. Word has length 145 [2019-09-07 11:02:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:02:30,493 INFO L475 AbstractCegarLoop]: Abstraction has 209 states and 293 transitions. [2019-09-07 11:02:30,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 11:02:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 293 transitions. [2019-09-07 11:02:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 11:02:30,494 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:02:30,495 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:02:30,495 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:02:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:02:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash -499810588, now seen corresponding path program 27 times [2019-09-07 11:02:30,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:02:30,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:02:30,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:30,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:02:30,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:31,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:02:31,025 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 11:02:31,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:04:43,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-07 11:04:43,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:04:43,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 11:04:43,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:04:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:04:43,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:04:43,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-07 11:04:43,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:04:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:04:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:04:43,720 INFO L87 Difference]: Start difference. First operand 209 states and 293 transitions. Second operand 31 states. [2019-09-07 11:04:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:04:44,174 INFO L93 Difference]: Finished difference Result 403 states and 580 transitions. [2019-09-07 11:04:44,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 11:04:44,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 150 [2019-09-07 11:04:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:04:44,179 INFO L225 Difference]: With dead ends: 403 [2019-09-07 11:04:44,179 INFO L226 Difference]: Without dead ends: 390 [2019-09-07 11:04:44,180 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:04:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-09-07 11:04:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 216. [2019-09-07 11:04:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-07 11:04:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 303 transitions. [2019-09-07 11:04:44,187 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 303 transitions. Word has length 150 [2019-09-07 11:04:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:04:44,187 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 303 transitions. [2019-09-07 11:04:44,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:04:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 303 transitions. [2019-09-07 11:04:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-07 11:04:44,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:04:44,189 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:04:44,189 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:04:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:04:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash -844480708, now seen corresponding path program 28 times [2019-09-07 11:04:44,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:04:44,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:04:44,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:04:44,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:04:44,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:04:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:04:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:04:44,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:04:44,771 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:04:44,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:04:56,942 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:04:56,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:04:56,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 11:04:56,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:04:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (29)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:04:56,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:04:56,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 11:04:56,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 11:04:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 11:04:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:04:56,999 INFO L87 Difference]: Start difference. First operand 216 states and 303 transitions. Second operand 32 states. [2019-09-07 11:04:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:04:57,357 INFO L93 Difference]: Finished difference Result 416 states and 599 transitions. [2019-09-07 11:04:57,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:04:57,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 155 [2019-09-07 11:04:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:04:57,360 INFO L225 Difference]: With dead ends: 416 [2019-09-07 11:04:57,360 INFO L226 Difference]: Without dead ends: 403 [2019-09-07 11:04:57,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:04:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-09-07 11:04:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 223. [2019-09-07 11:04:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 11:04:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 313 transitions. [2019-09-07 11:04:57,368 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 313 transitions. Word has length 155 [2019-09-07 11:04:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:04:57,368 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 313 transitions. [2019-09-07 11:04:57,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 11:04:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 313 transitions. [2019-09-07 11:04:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-07 11:04:57,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:04:57,370 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:04:57,370 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:04:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:04:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash 592967140, now seen corresponding path program 29 times [2019-09-07 11:04:57,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:04:57,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:04:57,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:04:57,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:04:57,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:04:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:04:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:04:57,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:04:57,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:04:57,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:07:42,461 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-07 11:07:42,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:07:42,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 11:07:42,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:07:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:07:42,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:07:42,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 11:07:42,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 11:07:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 11:07:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:07:42,560 INFO L87 Difference]: Start difference. First operand 223 states and 313 transitions. Second operand 33 states. [2019-09-07 11:07:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:07:43,092 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2019-09-07 11:07:43,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 11:07:43,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2019-09-07 11:07:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:07:43,095 INFO L225 Difference]: With dead ends: 429 [2019-09-07 11:07:43,095 INFO L226 Difference]: Without dead ends: 416 [2019-09-07 11:07:43,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:07:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2019-09-07 11:07:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 230. [2019-09-07 11:07:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-09-07 11:07:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 323 transitions. [2019-09-07 11:07:43,104 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 323 transitions. Word has length 160 [2019-09-07 11:07:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:07:43,105 INFO L475 AbstractCegarLoop]: Abstraction has 230 states and 323 transitions. [2019-09-07 11:07:43,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 11:07:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 323 transitions. [2019-09-07 11:07:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-07 11:07:43,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:07:43,107 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:07:43,107 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:07:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:07:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash 41560124, now seen corresponding path program 30 times [2019-09-07 11:07:43,107 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:07:43,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:07:43,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:07:43,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:07:43,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:07:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:07:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:07:43,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:07:43,567 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:07:43,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE